bluuebunny/crossref_metadata_2025_split huggingface dataset:
Barrier role of Cystoseira phytocenosis in the phosphorus detrophication in waters of the specially protected natural area “Cape Martyan” (Crimea, Black Sea)
Authors: Egorov V N , Bobko N I , Marchenko Yu G , Sadogurskiy S Ye 
Published: July 2022

Abstract
The goal of this study was to assess the role of Cystoseira phytocenosis as a biochemical barrier to the phosphorus detrophication through the phytoplankton primary production in waters of the specially protected natural area (SPNA) “Cape Martyan” on the southern coast of Crimea. We present data on the mineral phosphorus concentration in seawater and in the brown algae Cystoseira (Cystoseira s.l.) phytocenosis in 2021 and the phytoplankton primary production in 2017 – 2019. In the SPNA sublittoral zone, wet weight of the Cystoseira phytocenosis was estimated at 1425.6 tons, the production 3136.3 tons year–1, and the phosphorus accumulation factor 20,900 – 54,500. The phosphorus pool in the Cystoseira biotope ranged from 69.6 to 78.99% of that in the sublittoral zone and decreased with the phosphate concentration increase. The primary production in the SPNA sublittoral zone was mainly phosphate-limited. With the phosphate concentration increase, the primary production can reach hypereutrophication levels (100 mg Corg m–3 day–1). The phosphorus accumulation in the Cystoseira biotope reduced the phosphorus availability for the primary production to 10.4 – 30.4%. By the example of the SPNA “Cape Martyan”, we show that Cystoseira phytocenosis is a highly efficient barrier to the phosphorus detrophication in coastal waters.
Development of a comprehensive system for assessing the reliability of thermal power equipment
Authors: Borovkova A M , Medvedev V T , Pavlova G I , Burdiukov D A , Bayeva P N 
Published: July 2022

Abstract
The article reveals the necessity of monitoring the reliability of the electric power system as a complex technical system. Based on the consideration of the main regulatory documents, governing the assessment of the reliability of thermal power equipment and electrical networks, the article indicates the imperfections of the available methods of reliability assessment. A proposed comprehensive reliability assessment system allows a detailed assessment of the reliability of a complex system. The reliability of the power unit of the thermal power plant (TPP) was estimated by the logical-probabilistic method using the domestic software package. The existing problems of forecasting reliability indicators at various technical impacts are considered to obtain reliable calculation results.
Fiber acoustic control system for assisting jettison bladder type fuel cell of MI-8 helicopter in emergency conditions
Authors: Vinogradov V Yu , Muravyeva E V , Shakirova A I 
Published: July 2022

Abstract
To date, there is a problem with the safe operation of aircraft, namely with the safe evacuation of people in flight mode and during their landing from aircraft. The article discusses aspects of the use of fiber-optic and aeroacoustic technologies built into the general concept of a fiber-acoustic control system for assistance in safely jettison or dropping a bladder type fuel cell from a helicopter fuselage in an aviation emergency. The ability to control the parameters of speed, temperature, acoustic and optical noise, in case of deviation of the geometry of their bladder type fuel cell shapes, with an increase in speed, or critical pitch, shifting the level at which it is possible to drop filled bladder type fuel cell to enable a hard landing of an aircraft in an emergency.
Increased soil pH due to the application of sulfate-reducing bacteria, rhizobia and amendments to acid sulfate soils planted with soybeans
Authors: Hanafiah A S , Haniv Y , Sarifuddin  , Hidayat B 
Published: July 2022

Abstract
This study aims to determine the effect of the combination of Sulfate Reducing Bacteria, Rhizobia, and amendment matters on the soil pH acid sulfate soil planted with soybeans, carried out at the Greenhouse, Soil Biology Laboratory, Research Laboratory, Faculty of Agriculture, Universitas Sumatera Utara, from March to September 2021. This study used a factorial randomized block design with 2 factors and 3 replications. Each factor consists of 4 levels. The first factor were H0 (Control); H1 (Sulfate Reducing Bacteria); H2 (Rhizobia bacteria); H3 (Sulfate Reducing Bacteria + Rhizobia Bacteria), and the second factor was B0 (Control); B1 (EFB organic matters doses 15 tons/ha); B2 (EFB organic matters doses 30 tons/ha); B3 (Lime of CaCO3 doses 7.5 tons/ha). The research showed that Sulfate Reducing Bacteria, and Rhizobia were able to increase soil pH significantly. Application of EFB organic matters doses 30 tons/ha, and Lime of CaCO3 doses 7.5 tons/ha can increased soil pH.
Diversity of medicinal plants in the campus Universitas Sumatera Utara
Authors: Manurung H 
Published: July 2022

AbstractThe Universitas Sumatra Utara campus is included in a green campus. Identification of medicinal plants in a campus environment that has a large enough green open area is important to know the types that exist. The identification results can be used as a reference in the future to enrich medicinal plants around the campus and open up the knowledge of the community around the campus the importance of medicinal plants to be cultivated. This study aims to make an inventory of medicinal plants in the University of North Sumatra campus environment and the benefits of medicinal plants found. The method of collecting medicinal plant species was carried out by exploring the campus of the Universitas Sumatra Utara. There are 21 types of medicinal plants found on the campus of the University of North Sumatra. Medicinal plants, which are often used by the Indonesian people as spices or flavouring mixtures in cooking, include tamarind (Tamarindus IndicaL), balanced (Solanum torvumSw), coconut (Cocos nuciferaL.), pandanus (Pandanus amaryllifolius) and lemongrass (C.citratus).
Induction of mutation with colchicine in Olimpus potato by in vitro culture
Authors: Siregar M , Siregar L A M , Hanum C 
Published: July 2022

Abstract
Plant breeding of Olimpus potato is carried out to develop potato varieties which resistant to abiotic stress (high temperature) and to develop potato varieties in the lowland of the tropic. The uses of colchicine is expected to induce genetic diversity as a source for plant breeding. This research aimed to determine the effect of colchicine on the Olimpus potato in vitro and to generates genetic diversity to be developed into new varieties as material lines for selection. This study was conducted using a RBD with two factors, are concentration of colchicine with 5 level are 0%, 0.02%, 0.04%, 0.06%, 0.08% and immersion time duration of 12 h, 24 h and 48 h. The results showed colchicine treatment signifficantlyaffect on vegetative growth variables. Colchicine concentration of treatment with 0.04% and 24 hours immersion showed better growth of shoot than the control at variable leaf number and concentration 0.04% with 48 hours immersion at variable shoot height. Treatment with 0.08% colchicine and 48 hours immersion resulted highest number of internode than the control. The highest number of root present in concentration of colchicine with 0.02% and 12 hours immersion. Colchicine treatment resulted on variations of Olimpus potato shoot differently from control.
Vermicompost application to increase sweet potato local genotype yield to support sustainable agriculture
Authors: Rahmawati N , Sitepu F E T , Pasaribu M Y 
Published: July 2022

Abstract
Increased sweet potato yields can be pursued by using superior varieties and local superior genotypes. Each genotype or variety has a different response to the technical culture of fertilization or the use of organic materials. Vermicompost is an organic material that has advantages over other organic materials because it contains many nutrients needed by plants. The purpose of this study was to analyze the effect of vermicompost application on increasing the production of local sweet potato genotypes. The research was conducted in June – October 2020 in Medan Selayang District. The treatments studied in this study were sweet potato genotype (Tanah Seribu orange tubers, Tanah Seribu yellow tubers, Cengkeh Turi orange tubers) as the first factor and dose of vermicompost (0 tons ha-1, 10 tons ha-1, 20 tons ha-1, 30 tons ha-1) as the second factor using a Randomized Block Design. The three genotypes were significantly different in the parameters of tuber weight per plant, number of tubers per plant and harvest index, while the application of vermicompost and interaction of sweet potato genotypes and vermicompost increased tuber weight per plant, harvest index, and grade A fresh tubers.
Relationship analysis related to acid stress of some cornlines used in soil using SSR markings
Authors: Lubis K , Putriani T , Kardhinata E H 
Published: July 2022

Abstract
This research aims to characterize, identify and determine the kinship patterns and bands of genetic diversity in maize lines developed in acid soils from SSRmarkers. This research was carried out at the Molecular Genetics Laboratory, Faculty of Agriculture, Universitas Sumatera Utara, Medan, from March to July 2021. This study used 3 lines and 2 of F1 in corn. To determine band size with the UVITEC Cambridge Fire Reader and to calculate genetic similarity and formation, the group used the Multivariate Statistical Package (MVSP Ver. 3.2). The Research method is the molecular marker method with 3 SSR primers (Cams 358, Tms 7 and Tms 9) the results showed that 3 primers received bands with sizes in the range of 255582 bp. Based on PCOA analysis, there is one sample that dispensed, which equates to 102 713 × NEI 9008. Based on research, CLA 84 × NEI 9008, CLA 106, CLA 84, and NEI9008 are sensitive genotypes and 102 713 × NEI 9008 represent genotypes. tolerant toacid stress.
Response of wheatgrass and ricegrass growth on various types of planting media
Authors: Ritonga S , Vinolina N S , Charloq  
Published: July 2022

Abstract
Wheat and rice are plants that contain many health benefits, such as chlorophyll, protein and phenolic compounds, which are very suitable for consumption during the current COVID-19 pandemic. This study aims to observe the growth response of wheat and rice with various types of growing media. The use of the right planting media is expected to provide good content for wheat and rice plants so that they can be used as health drinks that are good for consumption. This study used a factorial completely randomized design using two factors, where : factor I = plant species with T1 (wheat) and T2 (rice) and factor II = type of growing media with P0 (top soil), P1 (top soil: husk charcoal). ) (1:1), P2 (top soil:cocopeat) (1:1), P3 (top soil:sawdust) (1:1) and P4 (top soil:husk charcoal:cocopeat:sawdust) (1:1:1:1). The results of this study indicate that the highest plant height data was obtained from rice plants with an average top soil planting medium of 18.13 cm. The highest protein content was found in wheat with top soil growing media: sawdust with a yield of 2.20 L/g. So it can be said that wheat can be used as a health drink because it contains high protein.
Survey and distribution of Pineapple Wilt Mealybug Wilt associated Virus (PMWaV) on pineapple plants in North Tapanuli, Indonesia
Authors: Hutahayan A J , Tantawi A R , Tobing M C , Lisnawita  
Published: July 2022

Abstract
The authors conducted a survey of Pineapple Mealybug Wilt-associated Virus (PMWaV) on pineapple plants in four pineapple-producing sub-districts in North Tapanuli, namely Sipahutar, Pangaribuan, Siborongborong, and Tarutung. This survey aims to detect the presence and distribution of PMWaV in North Tapanuli. The survey found PMWaV in pineapple plants in all survey locations with varying symptoms such as wilting to a yellow-red colour and curling leaf tips, curling and drying leaves and leaf tips, and showing symptoms of wilting to a redand yellow colour. The results showed an incidence rate between 15.6 to 80%. Sampang ni Huta V, Sipahutar, showed the lowest incidence rate (15.6%), while Lobu Siregar, Siborongborong, showed the highest (80.0%). Meanwhile, the severity rate was between 14.0 and 65.0%. Pancur Natolu, Pangaribuan, showed the highest severity rate (65.0%, severe), while Siabal-abal II, Sipahutar, showed the lowest (14.0%, moderate).
Effect of chicken manure and pruning on kyuri cucumber plant
Authors: Mawarni L , Siahaan M D A 
Published: July 2022

Abstract
Japanese or kyuri cucumber was more longer, softer and suitable for salads than local cucumber. Cultivation techniques for increasing the production of cucumbers can be done by manipulating growth by the pruning and application of manure especially chicken manure which is more complete than other manures. The study was conducted at Deli Serdang regency in polybag from January until April 2021. The result showed that the application of chicken manure has a significant on fruit weight per plant and root weight at a dose of 600 g/polybag. Pruning the main stem shoots has a real effect on the weight of the fruit. There is an interaction between chicken manure and pruning on fruit weight per plant. The best interaction was in combination of treatment with pruning and manure 600 g/polybag. So, cultivation of cucumbers in polybags is recommended using chicken manure 600 g/polybag and pruning on the main stem shoots.
Effectiveness of a single and a mixture treatments of rhizobacteria in increasing the growth and yield of hot pepper (Capsicum annuum L.)
Authors: Sutariati G A K , Rakian T C , Madiki A , Rahni N M , Wibawa G N A , Mudi L 
Published: July 2022

Abstract
Concern for the safety and public health of the environmental impact of the use of chemical pesticides has prompted more consideration of the use of environmentally friendly plant cultivation technologies as a natural approach to improve plant health. This study aimed to evaluate the effectiveness of seed treatment with rhizobacteria Bacillus sp.CKD061, Pseudomonas sp. SWRIIB04 and Pseudomonas fluorescens PG01 alone or in mixture on the growth and yield of hot pepper plants. The study was arranged using a randomized block design consisting of 8 rhizobacteria treatments, namely control, Bacillus sp.CKD061 (C), Pseudomonas sp. SWRIIB04 (S), P. fluorescens PG01 (P), mixture of Bacillus sp.CKD061 and Pseudomonas sp. SWRIIB04 (C+S), mixture of Bacillus sp.CKD061 and P. fluorescens PG01 (C+P), mixture of Pseudomonas sp. SWRIIB04 and P. fluorescens PG01 (S+P), mixture of Bacillus sp.CKD061, Pseudomonas sp. SWRIIB04 and P. fluorescens PG01 (C+S+P). The data obtained were analyzed using analysis of variance, followed by Duncan’s Multiple Range Test. The results showed that the seed treatment using a mixture of rhizobacteria Bacillus sp.CKD061 and Pseudomonas sp. SWRIIB04 was the most effective treatment in increasing the growth and yield of hot pepper plants. The increase in hot pepper production reached 90% compared to the control.
Consumers’ preferences for North Sumatera specialty coffees
Authors: Pane T C , Khaliqi M 
Published: July 2022

Abstract
The distinctive and special taste of Indonesian coffees has been renowned in the world coffee market. In the coffee’s production system at the farm level, the term specialty coffee typically refers to sustainable coffee. To keep up and maintain the uniqueness of specialty coffees’ tastes, the Ministry of Law and Human Rights (Kemenkumham) of Indonesia has issued the Geographical Indication certification on coffees. Understanding consumers’ preferences are very important to be able to identify the market, enabling producers and businesses to promote their products in a better way. This study revealed the consumers’ preferences for North Sumatera specialty coffees and investigate the problems in marketing them. The conclusions are: the coffee’s taste is the most important factor for consumers in deciding the coffee shop to buy specialty coffees; the medium acidity level (sour taste) is the most important factor for consumers in choosing specialty coffees to buy; and consumers prefer Sidikalang Robusta coffee the most, followed by Sumatera Mandheling and Sumatera Simalungun Arabica coffee.
Analysis of spinach and mustard farming portfolio in Marelan District
Authors: Tampubolon S M , Pebriyani D , Wibowo R P 
Published: July 2022

Abstract
Marelan District is one of the vegetable supplier areas for market needs in Medan City. Mostly the farmers in Marelan District cultivate spinach and mustard. In vegetable farming, farmers are faced the risk of price that can be seen from fluctuations in the price of spinach and mustard. Therefore, alternative that vegetable farmers can do to minimize the impact of risk is by doing diversification. In this research diversification is to combine spinach and mustard crop in farmer’s cultivation area. This combination is referred to as a crop farming portfolio. The results showed that diversification can reduce the risks of farming spinach and mustard. In addition, the portfolio that can be chosen by farmers is the third portfolio which is the portfolio with the lowest risk value compared to other portfolios.
Production and demand forecasting analysis of rice in North Sumatra in 2030
Authors: Lubis M M , Bakti D , Ginting R , Ayu S F 
Published: July 2022

Abstract
This study aims to determine a sustainable North Sumatera rice supply system in terms of rice production. The specification of the most suitable method for forecasting rice production and demand in North Sumatra in 2030 uses linear, quadratic and exponential trend analysis. The results show that the quadratic trend analysis best corresponds to the positive trend of the production and demand forecasts. In conclusion, the increase in production is dueto the continuous increase in demand for rice.
Performance of Automatic Ring Irrigation with Solar Panel Energy (ARISGY) to Pakcoy (Brassica Rapa L) Growth
Authors: Nasution D L S , Julianti  , Ichwan N 
Published: July 2022

Abstract
One of the attempt in improving and maintaining the stability of land productivity is maintaining the water avaibility in dry season. It is necessary to study about the performance of the development ring irrigation technology innovation with the utilization of solar energy panels and soil moisture sensor as an automatization so the water flows in accordance with plant water needs. The aim of this study was to analyze the growth of pakcoy by the utilization of automatic ring irrigation with solar panel energy with several type of emitter. Parameters of this study were plants growth (weight, height, and amount of leaves), emission uniform (Eu), effisiency of water saving (Es), and effisiency of application (Ea). The result shown a good performance based on irrigation efficiency but it was not performed the optimal plants productivity. Besides the availability of water, environment condition was another indicator that has important role in growing plants.
Water Consumption, Growth, Yield and Water Productivity for Pepper Plant
Authors: Ichwan N , Meliala F S , Ezra M F , Nainggolan M B , Nasution D L S , Daulay S B 
Published: July 2022

Abstract
Irrigation is a costly activity, where the amount of water should be given as much as required. Pepper plant is a horticulture plant that literally needs water, and one of methods could be used the field capacity (FC) water content method as set point to watering pepper plant. The study aimed to determine peppers’ water consumption, to describe pepper growth and yield, and lastly to determine pepper’ water productivity. The result of the study showed that the pepper water consumption rate for FC, 75% FC, and 50% FC were 151 ml/day; 117 ml/day, and 93.4 ml/day, respectively. Secondly, plant height in FC was higher than the others treatment, the average of yield were 52.49 g, 42.35 g, and 29.23 g, respectively. Lastly, water productivity were 0.054 g/ml, 0.042 g/ml, and 0.008 g/ml, respectively. The conclusion of the study were pepper water consumption for FC higher than the others, however water productivity for FC and 75%FC were closely, furthermore, 50%FC not recommended to be implemented for pepper cultivation.
Sensory attributes and in vitro digestibility of dessert (cendol) made from potato and banana starch with addition of carrageenan as texture builder
Authors: Khumaira N , Ginting S , Yusraini E 
Published: July 2022

AbstractIndonesians need rice as a staple food and its demand increases every year. Diversification of other ingredients to replace or substitute rice as raw material for non-staple foods such as cakes or desserts is urgent to be applied. This study aimed to producecendol,one of the most well-known desserts usually made using rice flour and tapioca.Cendolwas formulated using banana starch and potato starch with carrageenan as a texture builder. Then, the acceptability ofcendolamong consumers was assessed, as well as other functional aspects of the product. The results concluded thatcendoltreated with 90% potato starch: 10% banana starch and added carrageenan as much as 1.2% was acceptable to the panelists and it had a similar sensory response as well as commercialcendolfrom rice flour and tapioca for colour, aroma, taste and texture. The best-treatedcendolalso had a low digestibility, which was around two-thirds lower compared to native potato starch as a standard.
Physical characteristics of ginger tuber based on harvesting age and varieties
Authors: Utami D A , Yusraini E , Ridwansyah  , Lubis Z 
Published: July 2022

Abstract
This research was aimed to determine the physical characteristics of ginger tubers based on harvesting age and different varieties of ginger. The ginger used in this study got the age eight months, nine months, ten months, and 11 months. The varieties used are Elephant ginger, Emprit ginger, and Red ginger. This study used a randomized block design consisting of 2 factors (harvesting age and varieties). Based on the results of the research, it was found that the higher of ginger harvesting age, the smaller the size of ginger. This phenomenon happened because when ginger had high harvesting age, the chemical content of the ginger would increase, and it would be more solidify.
The analysis of technical and pro-analyst glycerine (C3H8O3) using in enzymatic glycerolises reaction of refined bleached deodorized palm oil (RBDPO)
Authors: Zakwan Z , Lubis Z , Julianti E 
Published: July 2022

Abstract
The emulsion products have been known widely in the world. This has attracted the attention of various industries and researchers to produce emulsifiers in an environmentally friendly manner. The enzymatic glycerolises catalysed by lipase was one way to produce monoglycerides from triglycerides and glycerine as reactants. The use of technical types of glycerine, that obtained from palm oil was more cost efficient and environment friendly than pro-analyst glycerine. However, it was not much known about how they differ in producing monoglycerides. The point of this study was to analyse the differences of glycerine type in enzymatic glycerolises reaction. This study used an experimental method using two treatment groups, namely technical and pro-analyst glycerine, each consisting of four samples. Enzymatic glycerolises reaction using lipase enzyme Thermomyces lanuginose Immobilized (TLIM) 5% w/w. The reactants were RBDPO, as triglyceride and glycerine with a mole/mole ratio. The reaction was performed at temperature 55°C within 8 hours using a water bath shaker with an agitation speed of 200 rpm. Monoglyceride levels were analysed using Gas Chromatography (GC) method. The results of the different test (t-test) showed that the p- value was > alpha 0.05, this means that H0 accepted.