bluuebunny/crossref_metadata_2025 huggingface dataset:
The man-made mineral wastes in production of construction materials of various functional purposes
Authors: Dergunov S A , Garcavy M S , Satyukov A B , Serikov S V , Odincova D S
Published: July 2022

The article presents the results of research on the combined use of mineral waste of metallurgical complex enterprises owned by OOO «Akkermann Cement». The production of construction materials for various functional purposes is considered. Promising directions of slag utilization in production of cement products directly at the enterprise are given. Possibility of obtaining energy-efficient composite cement based on different researches is determined. Prospects of creation of belite binder, concrete and building mortars based on it are considered. Compositions of high-strength dry building mixtures for the production of small architectural forms and surface repair have been developed. Optimal compositions of dry building mixtures and their main technical characteristics are shown.
Variant-scenario approach to the substantiation of instruments for Technosphere Safety of the advanced development territory
Authors: Filimonova L A , Matys E G , Uze E N
Published: July 2022

One of the directions of Technosphere Safety is to find ways of rational management of energy resources during the operational stage of the project. The studies of domestic and foreign sources show that the achievements in the field of resource conversation are the priorities of state and business under modern economic conditions. A special attention should be given to energy saving technologies that allow to solve a wide range of issues concerning the Russian economy and related to poor energy efficiency of many businesses. In the article content of the terms «energy efficiency» and «energy saving» is analyzed; the energy component of the modern economy is evaluated; the key issues of Technosphere Safety on the level of development of modern building technologies are identified; the importance of the transition to energy-efficient technologies in the building design phase in accordance with the principles of the international standard ISO 26000 «Guidance on social responsibility» by the development of project documentation of the investment project that is positioned on the status of public importance for the priority development areas; the variants of the energy efficiency activities are presented.
The influence of medicine plant extracts on viability of yeast cells of Saccharomyces cerevisiae and Saccharomyces carlsbergensis under the action of ionizing radiation
Authors: Oo Phyo Myint , Panfilov V I , Kuznetsov A E , Antropova I G , Kalenov S V
Published: July 2022

As noted in the literature review, the effect of H2O2 on a living cell as an oxidative stress agent is in many ways similar to the effect of X-ray radiation. In living cells, both H2O2 and X-ray irradiation cause oxidative stress and induce the same system of antioxidant anti-stress response. In addition, small doses of radiation can carry certain signaling functions in relation to the activity of microorganisms. In this regard, at this stage of research, it was interesting to find out whether exposure at a dose of 400 Gy and 800 Gy of X-ray radiation could be favourable for the growth of microorganisms with the introduction of extracts of medicinal plants and under which conditions.
Environmental Problems of Pipeline Leakages and Their Earlier Diagnosis
Authors: Brzhanov R T , Sadueva G Kh
Published: July 2022

The main environmental consequences of breakage on trunk pipelines are considered. Methods for early diagnosis and detection of damage to oil pipelines are considered. Methods for early diagnosis and detection of damage to oil pipelines have both positive and negative sides. From the analysis of methods for early diagnosis and detection of damage to oil pipelines, a differential method for diagnosing oil leaks is considered in detail. The features of the flow phenomena with incomplete filling of the pipeline section are described in relation to the problem of diagnosing oil leaks from an oil pipeline. In this article, the mathematical apparatus of the differential method for diagnosing leaks is considered in detail based on a comparison of the same parameters at different points of the route.
Investigation of the structural reliability of technological solutions of suspended ceilings
Authors: Baiburin A Kh , Vorobev S A , Baiburin D A
Published: July 2022

The object of research is fasteners for suspended ceiling systems. The purpose of the study was to test the strength of non-standard solutions for fixing suspended ceilings. The relevance of this study is confirmed by the large number of accidents involving the collapse of suspended ceilings. Non-standard fasteners for creating a suspended ceiling frame were studied and tested. Technical solutions from KNAUF catalogues were chosen as standard fasteners. The actual strength characteristics of the applied products for fasteners were determined. The measured characteristics were compared with official data from the manufacturers. The destructive loads and conditions of application of non-standard methods of fixing suspended ceilings and the possibility of their safe operation were evaluated. The costs of installing ceilings with non-standard fasteners were estimated. Recommendations were developed on eliminating defects in fasteners and on the use of non-standard fasteners for suspended ceilings.
The Role of Cultivation Methods and Lowlands Growing Environment on the Growth of Shallot (Allium ascalonicum L.) Varieties
Authors: Hasanah Y , Mawarni L , Hanum H , Irmansyah T , Manurung K R
Published: July 2022

The success of the shallots’ growth and production is strongly affected by the cultivation method, the variety selection, and the growing environment (location-specific cultivation). This study aims to evaluate the shallot’s growth using true shallot seed to cultivation methods in a lowland growing environment. The research is conducted in Pasar 1 Tanjung Sari-Medan community land located at an altitude of 32 meters, during June to September 2021. This study applies a factorial randomized block design, the first factor is the shallots variety using TSS (Lokananta and Sanren F1). The second factor is the difference in plant cultivation methods (seed supplier recommendation, modification of seed supplier recommendation, multiple production recommendation, modification of multiple productions). The results show that in the lowlands, plant height, number of leaves, and total of leaf area of Lokananta are higher than Sanren F1. The use of cultivation methods seed supplier recommendation increased in plant height and total leaf area. The combination of Lokananta treatment and seed supplier recommendation method results in the best plant growth indicated by an increase in plant height and total leaf area.
The effect of organic manure on the growth of dwarf banana (Musa paradisiaca L. ) under the natural shade
Authors: Muhidin  , Nuraida W , Florista D A , Nurmas A , Yusuf D N , Alam S , Samai S
Published: July 2022

This study aims to determine the effect of organic fertilizer application on dwarf banana Cavendish (Musa paradisiaca L.) in natural shade and determine the dose of fertilizer that gives the best effect on the growth of banana. The research conducted at Field Garden, Department of Agrotechnology, Faculty of Agriculture, Halu Oleo University. This study used a randomized block design (RBD) with organic fertilizer treatment consisting of control (P0/control), 87.5 g per polybag (P1), 170 g per polybag (P2), 262.5 g per polybag (P3), 350 g per polybag (P4), 437.5 g per polybag (P5) and 525 g per polybag (P6). Every treatment repeated three times. The variables observed were plant height, leaf number and leaf area. The results showed that organic fertilizer affected the growth of plant height, leaf number and leaf area. The treatment of organic fertilizer of goat manure at a dose of 170 g per polybag was a good dose of fertilizer in stimulating the growth of banana plants.
Early selection of drought stress tolerance in potato genotypes using polyethylene glycol (PEG) in the in-vitro condition
Authors: Sahat J P , Amien S , Qosim W A , Kusmana  , Handayani T
Published: July 2022

Drought stress threatens potato production by reducing tuber yield. To maintain the supply of potatoes, potato cultivars that are able to adapt and tolerate to water deficit conditions are needed. The aim of this study was to obtain potato genotypes with high tolerance in the early in-vitro selection by Polyethylene Glycol (PEG) treatment. Fifty-one potato genotypes were used in this in-vitro evaluation, cultured in the MS medium which treated by four level of PEG 6000 to induce the drought stress, namely 0, 30, and 60 g.L-1. The study revealed that in-vitro plants respond to PEG-induced drought stress by reducing their growth and vigour. The decreasing of plantlet vigour and leaves size also observed. At the end of observation, five genotypes performed good vigour at the 60 g.L-1 of PEG 6000, namely CIP 394613.139 × 5.13:1.1, ATL × 3.11:1.7, 2.13 × ATL:1.12.10.3, ATL × 3.11:3.6, and ATL × 3.11:8.14. Those genotypes were indicated tolerant to drought stress and need to be followed up with further evaluation in the green house environment to see the ability of tuberization under controlled water deficit condition.
Utilization of rice straw waste compost to increase growth and production of local sweet potatoes
Authors: Rahmawati N , Basqoro I
Published: July 2022

Sweet potato is a functional food that has potential to be cultivated in paddy fields after rice harvesting. Rice straw has the potential to become waste that can pollute the environment. Efforts that can be made to overcome these problems are to use rice straw as a raw material for making compost and apply it to sweet potatoes. This study aims to determine the effect of growth and production of local sweet potato genotypes with rice straw compost. The design used in this study was a Randomized Block Design with two factors, namely local genotypes (Cengkeh Turi yellow tubers, Cengkeh Turi orange tubers, and Tanah Seribu orange tubers) and dose of rice straw compost (0, 5, 10, 15 tons/ha). The results of this study showed that the local genotypes were significantly different in vine length, tuber length and average tuber weight. The application of straw compost at various doses significantly affected the increase in vine length, tuber length and average tuber weight. The interaction of local sweet potato genotypes and rice straw compost increased tuber length. The best growth and production was obtained from the local sweet potato genotype Tanah Seribu orange tubers with 10 tons/ha of rice straw compost.
Rice production in North Aceh Regency based on N, P, K and C-organic studies
Authors: Nazaruddin M , Rauf A , Rahmawaty  , Elfiati D
Published: July 2022

Rice is the staple food for most of Indonesia’s population. Efforts to increase rice production and productivity are really carried out with agricultural intensification and extensification. However, rice production and productivity did not increase significantly. This research was conducted to find out the nutrient content of N, P, K and C-organic in some irrigation area in North Aceh. The study was conducted in four irrigation areas in North Aceh, namely Krueng Sawang irrigation, Krueng Pase Irrigation and Krueng Langkahan Irrigation. The method used in this research survey method. Determination of respondents is using purposive sampling method. Observations made on observed soil chemical properties include N-Total, P-available, K-exchangeable, and C-organic soils. The farm business data is only the yield per harvest. The results showed that the soil C-organic content ranged from 1.61 to 5.18%, with low to very high criteria. N-total levels ranged from 0.17 to 0.55% with low to high criteria. P-available levels ranged from 1.87 to 6.85 ppm with very low to low criteria, Then, K-exchangeable content ranged from 0.29 – 0.96 ppm with low to high criteria. The yield per harvest ranges from 4.45 to 6.00 t/ha.
The role of auxin and giberalin in the growth of black cumin (Nigella sativa L.) by in vitro
Authors: Damanik R I , Sinuraya M , Setiado H
Published: July 2022

As an herbal plant, black cumin (Nigella sativa L.) has been widely used. The seeds are able to overcome various types of diseases including viruses, able to relieve pain (analgesic), anti-swelling (anti-inflammatory), antiallergic (antihistamines), antioxidant, antidiabetic mellitus, antitumor, and anticancer. Propagation of black cumin by in vitro or known as micropropagation is one of the artificial vegetative propagation that can meet the sustainability production for cumin plants in Indonesia. In vitro propagation of black cumin is able to produce large numbers of seeds in a relatively short time, has the same properties as the parent, with a seedling process that is not seasonally dependent. Currently, the study have started using MS media, and modification of the type of tissue culture media by adding 2,4 D of 10 mg/l combination with GA3 of 1 mg/l can increased the percentage of callus growth. The combination of these two types of growth regulators, also influenced the number of shoots, plant height and number of roots.
Growth Response and Biomass Production of Pegagan (Centella asiatica L(Urb)) from Medan Accession with Phosphorus Application
Authors: Sihombing F , Vinolina N S , Sinuraya M
Published: July 2022

Pegagan includes one of the wild plants that has a myriad of benefits. Today, Pegagan is primarily consumed as a vegetable salad or used as a spice. Besides, Pegagan is safe and effective that it also becomes a dietary supplement in certain countries. Pegagan medicinal plant as potential biomass is harvested from nature and cultivated to obtain uniform quality. This study aims to obtain the optimal dose of phosphorus for the growth of Pegagan production. The research was conducted in Pasar 1 Village, Medan Sunggal District, Medan City Regency, located at the height of ± 30 meters above sea level, from September to February 2021. The study used a non-factorial Randomized Block Design (RAK) with one factor, namely Phosphorus Fertilizer. with six levels, namely: 0 kg/ha, 15 kg/ha, 30 kg/ha, 45 kg/ha, 60 kg/ha, 75 kg/ha. Based on the research, the phosphorus fertilizer application significantly affects the parameters of leaf number, the weight of fresh leaves per plot, and the weight of fresh root plot.
The effect of drip irrigation on the growth of two varieties of sweet corn (Zea mays L.)
Authors: Muslimah Y , Lizmah S F , Harahap E J , Jasmi  , Alfatah M
Published: July 2022

This study aims to determine the effect of drip irrigation on the growth of two varieties of sweet corn (Zea mays L.). This research was conducted in the experimental garden of the Faculty of Agriculture, Teuku Umar University, Meulaboh, West Aceh. The time of the study was carried out on February 19 to May 22, 2021. This study used a separate randomized design (split plot) with the main plot (main plot) of drip irrigation treatment with 2 treatment levels, namely T0: without drip irrigation and T1: drip irrigation. Sub plots are sweet corn varieties which consist of 2 treatment levels, namely V1: bonanza variety and V2: paragon variety. Parameters observed were plant height, stem diameter, leaf length, number of leaves, leaf width, and leaf color. The results of the F test on the analysis of variance showed that the drip irrigation treatment had no significant effect on all observation parameters except leaf width at 15DAP in the drip irrigation treatment (T1). The sweet corn variety used had no significant effect on the observed parameters except for plant height at 15DAP on the bonanza variety (V1) and stem diameter at 45DAP on the Paragon variety (V2).
Growth and leaf anatomy of rubber clones (Hevea brasiliensis Muell. Arg.) IRR 400 series toward drought stress
Authors: Pasaribu S A , Basyuni M , Purba E , Tistama R
Published: July 2022

The growth and leaf anatomy of plants in general time will changes when cultivated in drought area. An adaptation plant process that can be assessed from morphological characters. The research was conducted in a greenhouse and physiology laboratory at Sungei Putih Research Center, Indonesian Rubber Research Institute from June to September 2020. The study design is factorial randomized block design (RBD), the first factor is rubber clones (IRR 425, IRR 428, IRR 429, IRR 434, IRR 440, RRIC 100, BPM 24), the second factor is water content based on capasity field (CF) (30%, 60%, 90%) with repeated three times. The data is analyzed by MINITAB 6 software. If the analysis showed a significant difference, it would be continued by Tukey 5% test. The observed characters were plant height (cm), girth (mm), cuticle thickness (μm), stomata density and leaf relative water content (%). The results showed plant height and girth a decrease when the water content 30% CF, while cuticle thickness, stomata density and leaf relative moisture content appeared to be relatively same between among water content. IRR 434 clone is selected as clone with highest of plant height and stem diameter in drought stress.
Price formation of red chili in producer level to maintain the sustainability of chili farmer’s farming business
Authors: Surbakti T , Supriana T , Iskandarini
Published: July 2022

Red chili is a commodity contributes to inflation. The high price fluctuations of red chili resulted in large marketing margins and low prices received by farmers. Low prices make farmers switch to growing profitable crops. This condition is closely related to an inefficient market because price information and its formation occur in a non-transparent manner. This research objective to analyse components that impact the prices arrangement of red chili producers. The data used is secondary data on farmers level of red chili prices, wholesalers, consumers, Cayenne prices and fuel prices for 2016-2020. The analysis utilized is Error Correction Model (ECM) to see the factors that influence the formation of red chili prices in long and short time. Results showed that the factors that influence the price formation in producer level of red chili in the short time are wholesale prices, consumer prices, prices of cayenne and fuel prices. Within the long time it will be influenced by the price of cayenne and producer prices from the previous month.
Determination of classification of red chili production area in North Sumatra Province
Authors: Novita D , Supriana T , Sirozujilam  , Lubis S N
Published: July 2022

One of the agricultural subsectors that has the smallest growth is the horticultural. The horticultural subsector is dominated by vegetables and mainly comes from red chili. North Sumatra is one of the biggest red chili productions in Indonesia, so it has a strategic role. However, the amount of red chili production tends to decrease every year. This study aims to determine various classifications for red chili production areas in North Sumatra Province. The determination of the classification for this area is carried out using secondary data of 23 commodities at the provincial and district levels. This study uses 3 stages of analysis. Stage 1 uses SLQ method to determine the base area. Then, stage 2, DLQ method to determine growth centres. Finally, in stage 3, based on the SLQ and DLQ values, the criteria for district-based areas are determined to be superior, prospective, mainstay, and underdevelop areas. The results showed that 5 districts are the superior areas in the development of red chili in North Sumatra. The districts include Batubara, Dairi, Simalungun, Mandailing Natal and Langkat. This condition means that the red chili in these 5 districts has a comparative advantage now and in the future compared to other agricultural commodities.
Mapping agricultural superior commodities area in North Sumatra Province
Authors: Novita D , Rinanda T , Riyadh M I , Rajiah N , Fitri A
Published: July 2022

The development of superior commodity areas is a step in creating the economic growth’s region. This study aims to mapping the agricultural commodity areas that are feasible to be developed in 33 districts in North Sumatra. The mapping will be analysed using Static Location Quotient (SLQ) and Dynamic Location Quotient (DLQ) methods to determine superior, mainstay, prospective and underdeveloped criteria. The data used is secondary data including production data of 51 agricultural commodities at the provincial and district level in North Sumatra. The data analysis period is 2019-2020. The results showed that there were eight agricultural commodities became the superior commodities. These commodities are red chili, cabbage, tomatoes, eggplant, durian, salak, rubber, and marine fisheries. Areas that make red chili a superior commodity are Simalungun and Batubara districts. Cabbage and tomato commodities are featured in Karo district. Durian is the superior commodity in Dairi, Mandailing Natal, Karo, Langkat, and western phakpak. The commodity of salak is the superior commodity in South Tapanuli and Padangsidempuan district. Rubber commodity is the Superior commodity in 7 districts, namely Nias, Mandailing Natal, Tapanuli Tengah, Padanglawas Utara, Labuhanbatu Selatan, Labuhanbatu Utara, and Padangsidempuan. Marine fisheries are featured in Central Tapanuli, Asahan, Serdang Bedagai and Batubara.
Sustainable cocoa farming to face environmental changes
Authors: Widayati W , Abdullah W G , Romantiaulia W I , Mihrad E S
Published: July 2022

This study aims to identify the problems of cocoa farmers in cacao farming, describe changes in cocoa farming patterns, and analyse the potential for sustainable cocoa farming development. The research was qualitative research. The informants of this study were members of the Tunas Mekar farmer group in Tumbu Dadio Village, Tirawuta sub-District, East Kolaka District. Data collection techniques were interviews, in-depth-interviews and focus group on discussion (FGD). Qualitative analysis was used in this research. The results of this study indicated that several problems of cocoa farmers were identified, including cocoa plants that were > 20 years old so, the failure of the cocoa plant rejuvenation project, unpredictable weather conditions, environmental changes, the phenomenon of commodity transfer from cocoa to other commodities (patchouli, oil palm, and lowland rice), income and financial uncertainty of cocoa farmers. The results of this study also indicated that the cultivation pattern changes and the management of several problems in cocoa farming could be a potential for the sustainable of cocoa farming development to face environmental changes. It could be further enhanced with the support of a strategic administrative location, unique environmental conditions, community character, and support from local governments and universities.
Finding the optimal crop portfolio for sustainability farming
Authors: Pebriyani D , Ayu S F , Arafah S N
Published: July 2022

Activities in the agricultural sector are always faced with risk and uncertainty. The problem of uncertainty is also experienced by vegetable farmers in Marelan District. Generally, farmers in Marelan cultivate long beans, spinach, and mustard. One alternative that can be done by farmers to minimize the impact of risk is by doing diversification. Moreover, diversification also supports the sustainability of agriculture. Diversification farming can be done by combining two or more crops in one area of cultivated land. This combination is also referred to as a crop farming portfolio. The optimal portfolio selection will be affected by the return and risk of the portfolio and farmers’ risk preferences. The result showed that the optimal portfolio in neutral preference is the portfolio II, spinach farming in monoculture. When risk preference changes from risk averse to very risk averse, the optimal portfolio is portfolio VI, the combination of spinach and mustard. The results of this research can be used by farmers as a reference in selecting the best portfolio and a reference for the government in making policies related to vegetable farming so that vegetable farming in the Marelan district could become sustainable farming and have a good impact to the environment.
Development of a single-row push type plot seeder with mechatronic seed feeding device for corn (Zea mays L.) field breeding experiment
Authors: Tabal R E , Amongo R M C , Quilloy E P , Peralta E K
Published: July 2022

The absence of an appropriate mechanization technology for lower stages of field breeding experiment is a common problem in seed research industry. This study was focused on the development of a corn plot seeder to be used in planting corn seeds for lower stages of field breeding experiments. The machine was equipped with mechatronic seed feeding device to provide an efficient way of sowing for every plot. Field testing and cost analysis between the Corn plot seeder and two other seeders were conducted to determine the performance and economic viability. Results showed that the Corn plot seeder can sow seeds at 0.49 ha/day with a field efficiency of 42.46 %. Its row/hill spacing was also at the optimum values of 70 ± 3 cm and 21 ± 4 cm respectively. It was able to sow 1 ± 1 seeds per hill and generated a 93% planting efficiency with a 7% missed hill. The Corn plot seeder had the highest capital investment of Php 27,380.00 but had the cheapest annual operating cost of Php 27,963.36. The push type corn plot seeder with mechatronic seed feeding device was the most efficient and economical machine for lower stage corn field breeding experiment.
The characteristics of oil from plastic cups using various rice husk mass as fuel on integration prototype device of organic-inorganic waste
Authors: Sigalingging R , Susanto E , Hutasoit E D
Published: July 2022

Energy recovery through waste-to-energy processes can provide an effective means of organic and inorganic treatment, sustainable energy generation, and resource recovery using integration pyrolysis equipment. The study objective was to analyses the characteristics of oil cups by using various masses of rice husk. The integration pyrolysis of an organic-inorganic waste device equipped with a temperature measuring device directly connected to a computer and the rice husk (8, 9, and 10 kg per batch with moisture content (% w.b) 7.94±0.86 from North Sumatera, Indonesia), and plastic cups (3 kg per batch) to be used. The results shows that the highest oil density of cups of mineral water plastic was using 10 kg of rice husk (M3), 0.7998 gr/ml, and the lowest density is in 8 kg rice husk (M1), 0.7507 gr ml-1. While the highest oil viscosity was 1.0988 cP in 10 kg of rice husk mass (M3), and the lowest was 0.9447 cP in 8 kg of rice husk (M1).
NIR spectroscopy as an environmentally friendly method to determine the lipid and carbohydrate concentration in Lintong Arabica coffee bean
Authors: Rindang A , Ayu P C , Sahfitri
Published: July 2022

Proximate concentration of green bean coffee is known as an important quality which influence the final flavour of coffee beverage. Lipid and carbohydrate are two of the proximate concentration, so that determination of those concentration in green coffee bean is needed. Commonly, determination of lipid and carbohydrate concentration was conducted using chemical method. This method spend time and destructive, so it is not suitable for industries which need a fast, nondestructive and environmentally friendly measurement. This study aimed to calibrate the NIR and chemical data of lipid and carbohydrate concentration using PLS method to build a real time prediction of coffee bean concentration. This study used a NIR wave of 1000-2500 nm, followed by determination of lipid and carbohydrate concentration by proximate analysis, first and second derivative, multiple scatter correction and standard normal variate as NIR data pretreatment. Result showed that lipid and carbohydrate concentration of Lintong arabica coffee bean could be well predicted using FT-NIRS.
Virtual Screening of Alpha Glucosidase Inhibition Using Common-Urban Herbs in Indonesia
Authors: Rahmasuha S , Lukitasari M , Fauziyah  , Jadid N , Ramadhan R , Hidayati D
Published: July 2022

Indonesia as a mega-biodiversity country have rich potential of herbal medicine that can growth easily at rural and urban area. Recently, Indonesian urban people are encouraged to have their own family herb plants namely tanaman obat keluarga or TOGA, which can increasing the health quality as well as economically. The urban herbs that are commonly planted may have esthetical and medical purposes. However the common urban herbs for medical purposes have not been proved yet scientifically. The objective of this study was to screening virtually the antidiabetic potential of bioactive compounds in common-urban herbs including Catharanthus roseus, Peperomia pellucida, Areta catechu, Physalis angulata, Apium graveolens, Imperata cylindrica, and Cassia siamea. Based on the references we selected the candidate of bioactives that contained in those common urban herbs such as Lochnerine, Cylindrene, Dihydroquercetin, Limonene, Vindolidine, Withangulatin-A, and Yohimbine. The selected bioactives were performed as ligands which their 3D structure were searched from the database of Pubchem prior to molecular docking analysis toward alpha glucosidase using PyRx method. Among the selected bioactives from common urban herbs, we found that withangulatin-A from Physalis angulata has the highest potential of antidiabetic medicine herbal via alpha glucosidase inhibition.
Morphometric characteristics of the Alas-Singkil drainage basins
Authors: Muhtadi A , Aldiano R , Khairunnisa  , Leidonald R
Published: July 2022

The Alas-Singkil drainage basin is the broadest watershed and an essential ecosystem for maintaining hydrology and ecosystems in the northern Sumatera. This study aims to describe the morphometric and hydrological characteristics of the Singkil watershed. The data sourced from Google Earth, DEM data and the results of team expeditions at the sub-watershed locations. The data analysis is related to the characteristics of the Singkil watershed, which include watershed area, watershed shape, river network, river flow pattern, river flow density, and watershed hydrology. Analysis of hydrological characteristics by calculating the peak of the flood was also carried out. The results showed that the Singkil watershed is a broad watershed with an area of 12027.18 km2. The Alas-Singkil drainage basin consists of 7 sub-watersheds, with the length of the main river reaching 368 km. The order of Singkil watershed reaches 8 orders and consists of 7235 orders 1, 1964 orders 2, 390 orders 3, 92 orders 4, 26 orders 5, 6 orders 6, 4 orders 7. The shape of Alas-Singkil drainage basin is elongated with RC value of 0.16. The level of river branching in the Alas-Singkil watershed is 4.76. The maximum discharge in the Alas-Singkil watershed reaches 59,178 m3/sec.
Application of sentinel 2A sattelite imagery for the estimation of canopy cover spatial distribution at mangrove vegetation
Authors: Sulistiyono N , Syafitri R , Hudjimartsu S A
Published: July 2022

Mangrove canopy density is one of the important variables for monitoring the health of mangrove vegetation. The vegetation index in satellite imagery is one of the variables that can be used to estimate the distribution of mangrove forest canopy cover. This study aims to predict the distribution of canopy cover of mangrove planted in Lubuk Kertang. The method used is regression analysis by connecting the NDVI value in the Sentinel 2A satellite image with the canopy density value in the field. Measurement of canopy cover in the field using a fisheye camera. The use of GIS is used to determine the spatial distribution of canopy cover. This study indicates that the linear regression model can estimate the canopy density distribution of mangrove vegetation in Lubuk Kertang with an R square value of 53.6% (sig < 0.005).
The implementation of open space toward living harmony at Taman Burung Cemara Asri in Medan, North Sumatra
Authors: Abus A F , Lubis T , Abus N A A
Published: July 2022

Taman Burung Cemara Asri as an open space has structuring and managing the landscape used the principles of sustainable in the implementation. The objective of this study was to describe the implementation of open space toward living harmony at Taman Burung Cemara Asri in Medan, North Sumatra. This research used qualitative research with a phenomenological research approach. The data were the landscape of Taman Burung Cemara Asri that consist of hard material and soft material. The description of this study showed that Taman Burung Cemara Asri as a concept of open space has several functions, including ecological functions, social functions, aesthetic functions, and economic functions. The ecological function is shown through the concept of good reforestation and a suitable microclimate. The social function of open space development can be seen from the pattern of activities presented, namely as a means of exercise, play, and recreation. The aesthetic function is shown through a landscape that looks beautiful, natural, has its charm, and is acceptable to residents and visitors. The economic function can be seen through the existence of open space used by the community to improve the community’s economy with the presence of vendors around the Taman Burung Cemara Asri.
Inventory insects of sorghum plantation in Northern Sumatera, Indonesia
Authors: Siregar A Z , Tulus  , Yunilas  , Nisa S C A
Published: July 2022

The purpose of this research was to invent types and abundance insects in sorghum plantation in Lalang Village, Rambutan District, Tebing Tinggi from July to August 2021, with an area of 12 m × 12 m. Insects were collected using sweep traps, pit fall traps, light traps and yellow sticky traps. The collected insects were collected and then were identified. Data analysis was carried out by descriptive quantitative with Purposive Random Sampling (PRS), which identified in the Pest labouratory-USU. The results research identified was four insects Orders (Coleoptera, Diptera, Hemiptera and Lepidoptera) with 9 families (Chrysomelidae, Scarabaeidae, Cecidomyiidae, Muscidae, Aphidae, Dephiciodae, Pentatomidae, Noctuidae, Pyraliidae) and 16 species. The highest insect pest population was at the time of the sixth sampling as many as 634 individuals/plot, the predator population was 248 individuals/plot, and the parasitoid population was 118 individuals. Calculation of richness index R1yst=8.49: R1sn=7.65, eveness index (Eyst=0.59; Esn=0.48) and insects diversity Shannon-Wiener index (H’yst=2.56; H’n=2.13). Then the parameter environmental measure of temperature (30.3-36.2°C), humidity (82-90%) were carried out during the sorghum plantation period.
Distribution, characteristics and models of community roles in the utilization and preservation of environmental services in the Simarjarunjung nature tourism area, North Sumatra Province
Authors: Purwoko A , Sahputra A
Published: July 2022

Indonesia, especially in North Sumatra Province, has many tourist destinations that take advantage of its uniqueness, exotica and natural beauty. Some of these destinations are managed or at least involve the community in their management, such as the Simarjarunjung Nature Tourism Area, Dolok Pardamean District, Simalungun Regency. This study aims to identify the distribution and characteristics of natural tourism objects, examine the use of environmental services and the role of the community in preserving environmental services in the Area. The results showed that in the Simarjarunjung Nature Tourism Area from the tracking and point paths there were 5 natural tourist locations, namely Pine Hills Nature Tourism, Dolok Sipigul, Panatapan Dolok Sidoorangin, Bukit Indah Simarjarunjung and BIS Annex. The potential for environmental services utilized in the Area consists of a cool micro climate, beautiful natural scenery, camping ground areas, outbound activity areas, educational attractions and photography spots with views of Lake Toba. The majority of the management of natural tourism areas is carried out by the community together by forming a forest farmer group (KTH). The role of the community is analysed using several role indicators, namely expectations about the role, norms, forms of behavior in roles, assessment and sanctions.
Identification of the distribution of natural tourism objects along the outer ring road of Lake Toba Aek Nauli-Merek section, North Sumatra Province, Indonesia
Authors: Purwoko A , Slamet B , Pohan N Z P
Published: July 2022

Indonesia as a country that has the potential for high value natural beauty has an average ecotourism growth of 10% per year. This figure is higher than the general growth rate of 4.6% per year. North Sumatra Province has many tourism objects based on the use of natural beauty, but the development is still limited, especially those along the outer ring of Lake Toba, the Aek Nauli Merek section. This study aims to identify and map the distribution of natural tourism objects along the outer ring of Lake Toba section of the Aek Nauli Merek section, North Sumatra Province. Distribution analysis was carried out using GIS software and Google Earth for data processing. The results of the study indicate that 49 natural attractions have been identified scattered along the research location. The forms of natural tourism consist of camping ground, outbound activities, educational tours, natural scenery/landscapes of Lake Toba. The results of the identification of the distribution of natural tourism objects are plotted on a map by taking coordinates consisting of graphic data anhd attributes for each identified tourist attraction.
Ethnobotany of medicinal plants in Asam Jawa Village, South Labuhanbatu, North Sumatra, Indonesia
Authors: Rambey R , Onrizal O
Published: July 2022

Every year, the use of natural compounds for the treatment of various diseases tend to increases. Traditional medicine derived from plants has long been used by the people of Indonesia. Despite significant advancement of modern medicine, medicinal plants have become the preferred alternative option for many tribes in Indonesia. The goals of this study were to (1) identify the medicinal plant species used in Asam Jawa Village, Torgamba District, South Labuhanbatu Regency, (2) identify the purpose of using each medicinal plant, (3) identify the part of the plant used, and (4) determine how to process and use each medicinal plant. This research method employs in-depth interviews with key respondents as well as the snowball sampling method for determining respondents. The findings revealed that the villagers of Asam Jawa Village utilized 40 different species of medicinal plants. The species were classified into 26 families. The most of families are originated from the Zingiberaceae family, which consist of five species (12.5%) Based on the therapy purpose, the species used for fever, cough, stomach pain, diarrhea, gout, cholesterol, itching medicine, backache medicine, anti-inflammatory, and others.
Identification of stingrays species and exploitation rate of blue-spotted maskray (Neotrygon kuhlii) landed at TPI tanjung beringin, Serdang Bedagai Regency, North Sumatera Province
Authors: Manurung V R , Nasution S F P , Nababan M , Desrita  , Hasibuan J S
Published: July 2022

Serdang Bedagai Regency has fisheries and marine potential demersal species of stingray in TPI Tanjung Beringin. The current study used a survey and descriptive method, accompanied by sample collection and morphology identification, as well as determining the rate explotation of fish landed in TPI Tanjung Beringin. A total of five species were successfully identified:Neotrygon kuhlii, Brevitrygon heterura, Aetoplatea zonura, Maculabatis macruraand Rhynchobatus australiae. The most dominant stingray species landed in TPI Tanjung Beringin namely ofNeotrygon kuhlii,so that condition was an analysis ofNeotrygon kuhliiweight length relationship of fish and body weight is negative allometric growth is more dominant than weight gain. The growth rate Von Bertalanffy is L ∞ (infinity) value is 300.30 mm, K value is 0.42 and t0 value is -0.68, the fish growth can be influenced by internal and external factors. Mortality and exploitation rate ofNeotrygon kuhliitotal mortality (Z) value is 1.01, natural mortality (M) value is 0.59408, fishing mortality (F) value is 0.4192 and exploitation rate is 0.7105 as long as indicators high fishing mortality and decreasing natural mortality indicate a state of growth overfishing.
Biomass and carbon storage of Sargassum sp. in Poncan Gadang Island, North Sumatera Province
Authors: Hutapea E D , Susetya I E , Fadhilah A , Yusni E , Wahyuwatri I , Manik E A , Aritonang J E , Setyorini H B , Suriani M
Published: July 2022

One of the efforts made to reduce the increase in CO2is to use coastal vegetation such as macroalgae. This research was conducted in Poncan Gadang island, North Sumatera. The purpose of this research is to know the density and biomass of macroalgaeSargassumsp. and to estimate carbon storage in the macroalgaeSargassumsp. in the waters of Poncan Gadang island. The results showed that the biomass and carbon stores inSargassumsp. are quite large and varied from 2.82 kg C m-2, 4.80 kg C m-2, and 4.63 kg C m-2in every sampling point with an average of 4.08 kg C m-2. This meansSargassumsp. has the potential in mitigating climate change through carbon sequestration. Differences in the value of carbon stored in the biomass ofSargassumsp. are affected by biomass density and different carbon content at each sampling point due to environmental conditions.
Habitat characteristics of bicolor Pen Shell (Pinna bicolor) in seagrass ecosystems in Poncan Gadang Island, Sibolga City, Sumatera Utara
Authors: Susetya I E , Hutapea E D , Manik E A , Wahyuwatri I , Aritonang J E , Saridu S A
Published: July 2022

Poncan Gadang Island has a complete coastal ecosystem, one of them is the seagrass ecosystem. One of the biotas that inhabit the seagrass ecosystem on this island is the Bicolor pen shell. This shellfish has an ecological function because of its role in the food chain in seagrass beds and has economic value. This study aims to determine the abundance of bicolor pen shells and their relationship with seagrass cover, water physical-chemical parameters. The sampling was conducted at the research location in July – September 2021, which was located on Poncan Gadang Island. This activity was carried out at 3 stations. The primary data taken were the abundance of Bicolor pen shell, seagrass, physic-chemical parameters of water and substrate. Sampling was carried out three times. The results showed that the abundance of bicolor pen shells ranged from 1.8 to 2.8 ind m-2. Station 1 has the lowest abundance and the highest is at station 3. The PCA results show that the abundance of shellfish is positively related to temperature, DO, salinity and C-organic, while percent cover of seagrass, pH, water transparency, depth, and current were negatively related to the abundance of these shellfish.
Impact of distinct levels swimming crab shell powder (Portunus pelagicus) supplementation on in vitro rumen fermentation properties processed with phosphoric acid as a chitosan source
Authors: Anggraeni A S , Sofyan A , Jayanegara A , Laconi E B , Kumalasari N R , Herdian H , Darma I N G
Published: July 2022

The major goal of this study was to see how adding swimming crab shell to dietary feed affected in vitro gas production and fermentation of feed in ruminal fluid Completely Randomized Design (CRD) with five treatments and four replications was arranged on this research. The treatments are RJ0 as control negative (0% of SCS supplementation of DM), RJ1(10% SCS), RJ2 (20% SCS supplementation), RJ3 (30% SCS supplementation), and RJ4 as possitive control (1% commercial chitosan supplementation). The highest gas production given by RJ0 treatment than other treatment. Total gas production 1-48 hours, rate of gas production (c), microbial cell protein, IVDMD, IVOMD of supplementation of SCS was significantly affected by treatments (P<0.05). Gas production from total fraction (a+b), soluble fraction (a) and insoluble fraction (b), NH3 production, and ammount of protozoa indicated no significant difference (P>0.05) among treatments. In this study basal diets supplemented with 30% SCS treatment had the best result as chitosan source on rumen fermentation properties in vitro.
The comparative of activator effect and fermentation time on nutrient quality, physical quality (temperature, pH) in compost
Authors: Sadeli A , Wulandari A , Sinuraya L , Mirwandhono E , Hakim L
Published: July 2022

Activator in compost has key role to get soil nutrient more nutritious. Compost is one of organic material that help environment keep always good. This study was conducted to determine the effectiveness of Stardec and EM4 using cow feces, chicken manure, rice straw, palm fronds and palm leaves. Compost is one type of organic fertilizer derived from plant and animal waste which is very useful for improving nutrients in the soil. Most farms in Indonesia do not use waste such as animal manure to be used as compost. The research was conducted anaerobically, by analyzing N, P, K, water content, C/N ratio, pH, and temperature. The research design used was a completely randomized design (CRD) with a 7-day fermentation treatment and the provision of different activators, namely stardec and EM4. The results of this study indicate that compost using Stardec and EM4 activators showed levels of NPK, pH, Temperature met the standards for nutrient content, as well as physical quality.
Study of potential of plantation and agriculture waste as feed for support the development of cattle population in district along east coast of Sumatera Utara province
Authors: Mirwandhono E , Hasnudi  , Kardhinata E H
Published: July 2022

Development of various important industries in the region, such as livestock, agriculture and plantations (especially oil palm and rubber) led to a marked increase in regional domestic income. The increase in the economy affects the consumption pattern of the localcommunity, especially in relation to the increasing demand for foodstuffs of animal origin such as meat, eggs and milk. This study aims to determine of agricultural and plantation by product that used for feed for cattle This research was used a descriptive data. This research was conducted at North Sumatera Province drom May–August 2020. Results showed that North Sumatra Province,which in this study was represented by districts along the east coast, potential for developing beef cattle in several districts, namely Langkat Regency, Deli Serdang, Serdang Bedagai, Labuhanbatu Utara, Batubara, and Asahan are in accordance with the abundant sources of feed fromagricultural and plantation waste.
Comparative study of broiler chicken performance in closed house and conventional system in North Sumatera
Authors: Farida T E , Hanafi N D , Tafsin M
Published: July 2022

The influence of a comfortable environment provides good performance results on the quality of chicken meat for sustainability to improve the health quality of broiler chickens. This research was conducted from July 2021 to September 2021 in Deli Serdang, Serdang Bedagai and Simalungun districts. This research aims to look at the effects of maintaining closed house and conventional systems. The parameters observed are temperature, humidity, FCR, depletion, Performance Index. As primary data was conducted direct observation to the cage closed house JS population 30,000 tails and conventional cage RS population 4500 tails and interviewed as many as 104 samples (31 respondents closed house, 73 respondents conventional)with the sample method intentionally (purposive sample) and uses the formula Slovin. The appropriate temperature and humidity influence will result in a good performance of broiler chickens. Temperature and humidity detection using the HTC-2 thermohydrometer tool. Data processing results with statistical tests describe FCR results at closed house 1,516 and conventional 1,554; depletion closed house 3% and conventional 4.14% and IP on closed house389 and conventional 358. Display of t-test calculation results on FCR P (sig)<0.05; depletion P(sig)<0.05 and IP P(sig)<0.05 (real difference).