bluuebunny/crossref_metadata_2025 huggingface dataset:
Comparison of the effect of Azospirillum baldaniorum sp245 and exogenous indolyl-3-acetic acid on the growth of ten varieties of potato microclones in in vitro culture
Authors: Grigoryan M A , Starchikov A A , Tkachenko O V , Burygin G L , Kurasova L G
Published: April 2022

The article presents the results of a comparison of the effect of rhizospheric growth-stimulating bacteria of the Azospirillum baldaniorum Sp245 strain and exogenous indolyl-3-acetic acid on the growth of microclones of potato varieties Nevsky, Condor, Red Scarlett, Rosara, Avrora, Zhukovsky early, Ilyinsky, Vasilek, Fioletovy, Darenka at micropropagation in in vitro culture. The A. baldaniorum Sp245 strain is capable of synthesizing indolyl-3-acetic acid upon plant inoculation. Exogenous indolyl-3-acetic acid was introduced into the nutrient medium in three concentrations. The physiological and morphological parameters of the shoots and roots of potato plants were assessed on the 20th day of cultivation. A significant influence of the plant genotype and cultivation conditions was established. According to the nature of reactions to exogenous indolyl-3-acetic acid, all varieties are divided into three groups. The maximum effect of inoculation with bacteria was noted for varieties of the first group: Avrora, Ilyinsky, Red Scarlett.
Monitoring of the weed component of the flora of fallow lands of the southern part of the Volga Upland within the administrative boundaries of the Saratov region
Authors: Sergeeva I V , Ponomaryeva A L , Shevchenko E N , Gulina E V , Sadovnikova E V
Published: April 2022

The article presents the analysis of the weed flora of the fallow lands of the southern part of the Volga Upland area within the administrative borders of the Saratov region. The characteristics of different-age deposits are given: minor (1-2 and 3-4-5-year-olds), medium-age (6-10-year-olds) and old-age (12-15-year-olds) weeds. The authors point out common species of weeds for each age group of fallow lands. The leading families are described. Weed flora was analyzed by the life forms (according to I.G. Serebryakov), the way of seeds and fruits distribution, according to the response to soil moistening. Geographical analysis of the flora is given, adventitious species being indicated.
The expediency of crop production in conditions of risky farming
Authors: Sharikova I V , Kondak V V
Published: April 2022

The article presents a comprehensive author’s study of the problem of the feasibility of cultivating crops in the zone of risky farming, which includes ¾ of our country, when the impact of weather disasters and anomalies is associated with the risk of obtaining a crop and, accordingly, sources of financing for further activities. With the help of the formed system of indicators, an assessment is made of the dynamics and variations in the level and efficiency of the intensification of grain and oilseed production. In this regard, of particular interest is the criterion of expediency, which, in our opinion, in the conditions of constantly impending financial crises, should ensure the very possibility of the continued existence and functioning of an agricultural enterprise. The analysis was carried out and the trend in the yield of grain and oilseeds in the Saratov region was revealed, the degree of influence of weather and anthropogenic factors on its dynamics was determined. Considered production and economic indicators for microzones and administrative districts of the region; the grouping and classification of municipalities according to the effectiveness of the analyzed types of activities was carried out; the actual values of performance indicators were compared with the normative ones, which makes it possible to judge the degree of tension in the use of enterprise resources. A stochastic model is proposed and an assessment is made of the degree of influence of the main production factors on the variation in the value of the chosen criterion of expediency. The need for research on the regulation of labor and its tariffing in agricultural production is noted. The problematic aspects of grain and oilseed production in the context of individual territories have been identified, a number of aspects have been identified that can influence the adoption of an objective decision on the feasibility of production activities.
Determination of the dependence of the level of food use of wheat gluten on the degree of its peeling
Authors: Anisimov A V
Published: April 2022

The article analyzes the level of food use of grain components during varietal grinding, in particular gluten, and the effect of peeling before grinding on it. A criterion indicator of the level of food use of gluten is proposed, taking into account its losses with bran. The dependence of the criterion index on the degree of peeling (% of the shutter opening at the outlet of the peeling machine δz) was experimentally obtained and its optimal value was determined ηcl = 77.3% at δz = 70%, taking into account the technological feasibility of the peeling process.
Efficiency of using a bioconversion substrate of champignons for propagation of ornamental shrubs
Authors: Logacheva E A , Larina YU V , Azizov I R
Published: April 2022

The article discusses the issue of the possibility of using vermicultivated humus as a nutrient component of a soil mixture for rooting cuttings obtained as a result of bioconversion of mushroom compost. The optimal ratio of organomineral components for the creation of artificial substrates has also been studied.
The Detection of Microbial Contamination on Goat Meat from Traditional Market in Bandar Lampung City
Authors: Riffiandi N , Maradon G G , Pertiwi V R
Published: April 2022

The research aims to evaluate the microbial contamination of goat meat sold from the traditional market in Bandar Lampung. The survey method was used in this research, and the data were analyzed descriptively. 250 gr goat meat sample was taken from 5 traditional market in Bandar Lampung (Koga Market, Bambu Kuning Market, Way Kandis Market, Tamin Market and Tugu Market). Samples were taken at 07.00 PM. The research was conducted in the Disease Investigation Center of Lampung. The parameter of this research was Total Plate Count (TPC), coliform dan Escherichia coli. Total Plate Count (TPC) analysis in goat meat samples showed the highest contamination was from Tugu Market at 2.90 × 105 cfu/gr. Followed by Tamin Market at 1.30 × 105 cfu/gr and the lowest was from Koga Market, Bambu Kuning Market and Way Kandis Market at 1.00 × 101 cfu/gr respectively. Meanwhile, the highest coliform contamination was found from the goat meat sample from Tugu Market and Tamin Market at 11.00 × 102 cfu/gr. Followed by Way Kandis Market at 2.4 × 102 mpn/gr, and the lowest coliform contamination was found in goat meat sample from Koga Market and Bambu Kuning Market at 9.30 × 101 cfu/gr and 0.36 × 101 cfu/gr respectively. Furthermore, the content of Escherichia coli contamination from all traditional markets was below <101.
Priority Analysis of Regional Rehabilitation Activities Irrigation Way Apu System by using Simple Additive Weighting (SAW) Method
Authors: Virgianti L , Setiawan A , Tugiyono  , Bakri S
Published: April 2022

Currently, the facilities and infrastructure of the Way Apu System Irrigation Area have degraded in function, thus disrupting the level of agricultural productivity in Buru Regency. Therefore, to restore the function of irrigation infrastructure, it is necessary to carry out rehabilitation activities. Ideally, rehabilitation activities should be carried out comprehensively and simultaneously, but it is necessary to select priority activities due to budget constraints. Various methods can select activity priorities, but in this study, the simple additive weighting method is used, namely the method by finding the weighted summation of the performance ratings of each alternative on all attributes. This study showed that the activity that became the priority with a score of 0.707 was the rehabilitation of the Way Pamali weir. Meanwhile, other activities can be carried out according to the available budget.
Test of Newness Uniformity and Uniqueity 11 Polinela Hybrid Corn Lines
Authors: Kartahadimaja J. , Syuriani E. E.
Published: April 2022

Apart from being a staple food, corn has become more important because it is a staple for the animal feed industry. The need for seeds from year to year continues to increase. Eleven promising hybrid maize lines as candidates for new high yielding varieties assembled by Polinela need further testing, including the NUSU test (new, unique, stable, and uniform). The research objective was to test the novelty, uniqueness, uniformity, and stability of the 11 new hybrid maize lines. The treatments were 11 hybrid maize lines, namely lines A, B, C, D, G, H, L, M, P, Q. The treatments were arranged in a Randomized Completely Block Design (RCBD). The variables observed were plant height, harvest age, number of cobs per plant, length of ear, the diameter of ear, number of rows of seeds per ear, weight of 100 seeds, yield of seeds per plant, yield of seeds per hectare. The qualitative character observed was the color of the base of the stem, the color of the pistil (silk) and the color of the male flower (tassel). Uniformity was analyzed by calculating the coefficient of diversity (KK). The results showed that the appearance of the phenotypic characters in each line was very homogeneous with the uniformity level reaching 99.9%.
Premium Green Beans Selection from Dry Processing
Authors: Humaidi Edy
Published: April 2022

The purpose of this study was to analyze consumer preferences for the attributes of dry processed green coffee beans. This research was conducted by survey method and direct observation. The sampling method in this study will be carried out by the purposive sampling method. The analysis technique used is descriptive and quantitative analysis. The results of the analysis show that the attributes of size, color, taste, quality defects, shelf life, price, and ease of obtaining the natural process coffee beans are better than naturally processed coffee beans, while the roasting speed attribute of processed honey coffee beans is faster than the natural process., based on the average score for each of these attributes shows that coffee shop owners prefer coffee with natural processing because it is easy to obtain and has a strong body taste. And based on the correlation analysis of the attributes of naturally processed coffee beans to the level of consumer preference, it shows that the attributes of the size and color of the coffee beans show a close relationship with consumer preferences with a significance value of 0.003 for the size of the coffee beans and 0.027 for the color of the coffee beans.
Application of Carbon and Nitrogen Ratio in The Sangkuriang Catfish Culture Clarias gariepinus var in Tarpaulin Tanks
Authors: Aziz R , Oktaviana A
Published: April 2022

Sangkuriang catfish (Clarias gariepinus var) is a freshwater commodity fish that has the potential to be developed. Sangkuriang catfish farming activities still often experience problems in their implementation, especially water quality problems in the form of a buildup of organic matter that does not decompose and causes poison to catfish. The determining factor of success in growing heterotrophic bacteria in aquaculture waters is the ratio of C/N in the tank of sangkuring catfish. This study aims to determine the C/N ratio, growth rate, and survival of catfish. The results showed that the addition of a C/N ratio of 10:1 has an effect on the growth, survival rate of catfish and can reduce the ammonia content in catfish culture media.
The Effectiveness of Some Essential Oils as Botanical Fungicides Against Inhibition of the Growth Cocoa Fruit Rot Phytopthora Palmivora
Authors: Erfandari O , Sudirman A , Sari S
Published: April 2022

The main disease in cocoa pods is fruit rot caused by the fungi Phytophthora palmivora. The loss caused by P. palmivora is almost 90%. Currently, the control is still using synthetic fungicides which are harmful to humans and the environment. Therefore, the use of essential oils as fungicides is a safe control for the environment. This study aims to obtain a combination of nutmeg, cloves, and citronella that are effective as a botanical fungicide to control cocoa pod rot disease. The study was conducted at the Lampung State Polytechnic Plant Laboratory using a completely randomized design with 8 treatments which were repeated 5 times. The treatments tested were (1) negative control (water), (2) positive control (synthetic fungicide), (3) nutmeg oil, (4) clove oil, (5) citronella oil, (6) nutmeg + clove oil, (7) nutmeg oil + citronella, and (8) Clove and citronella oil. Essential oil testing on the growth of P. palmivora was carried out in vitro by inoculating agar pieces containing fungal culture on the surface of PDA containing essential oils. The results showed that all essential oil combination treatments were able to suppress the growth of the P. palmivora on PDA media. The combination of nutmeg oil and clove oil can suppress fungal growth by 77%, while the combination of nutmeg oil and citronella oil reaches 56.5% and the combination of clove oil and citronella oil reaches 27%. However, the single treatment that best suppressed the growth of P. palmivora was citronella oil, which was 32.8%.
Adaptability of Robusta Coffee (Coffea Canephora) At Lowland Climate
Authors: Hartono JSS , Utoyo B , Widiyani DP
Published: April 2022

Coffee is one of the important commodities in Indonesia. The coffee commodity has strategic potential in the development of the community’s economy. Over time, coffee production in Indonesia has decreased, the average productivity of coffee in Indonesia is only around 600 kg/ha, while the potential for coffee production per hectare can reach 1000 kg/ha. This research was conducted in the Lampung State Polytechnic Coffee crops Experimental Garden, located in Rajabasa Village, Rajabasa District, Bandar Lampung City, in May-October 2021. the tools and materials used in this study were stationery, camera, raffia, meter, thermometer, hygrometer, lux meter, alti meter, coffee clone BP 936, BP 358, and BP 534. This study used a simple 1-factor randomized block design with treatment of 3 superior coffee clones: P1: BP clone 936, P2: clone BP 358, P3: clone BP 534 which was repeated 6 times so that 18 experimental units were obtained. Observational data that has been obtained will be analyzed using analysis of variance (F test) at the 5% level. If there is a significant difference (F count > F table 5%), it will be continued with the Least Significant Difference (LSD) follow-up test with a level of 5%. Based on the results and discussions that have been obtained, it can be concluded that the lowland conditions produce a different climate with the characteristics of the robusta coffee plant, including relatively high temperature, high humidity and high light intensity, while the most adaptive coffee clones in lowland climates are: clone BP 358.
Optimization of Addition of Garlic Powder (Allium sativum) in Ration to Broiler Performance
Authors: Sukaryana Y , Syahpura S K , Susanti
Published: April 2022

This study aims to determine the performance of broilers given Garlic Powder (Allium sativum) in the ration. This study used Garlic Powder (Allium Sativum) in the ration given in the morning to broilers aged 2 weeks for 7 each days. The study design used a completely randomized design (CRD) with 4 doses of Garlic Powder (Allium Sativum) treatment, namely T0 (0%), Tl (1%), T2 (2%), T3 (3%) in drinking water (v/v). Each treatment was repeated 5 times and each replication consisted of 10 broiler, which were placed randomly. The results showed that the treatment dose of Garlic Powder (Allium sativum) in the ration was significantly different (P<0.05) on body weight, body weight growth, and feed consumption of rations, and was not significantly different on broiler ration consumption.
Development Strategy of Organic Rice in Lampung Selatan Regency
Authors: Handayani Sri , Noer Irmayani , Desfaryani Rini
Published: April 2022

Abstract As one of the commodities supporting food security is underdeveloped due to marketing problems. Fluctuating supply and prices of organic rice, weak market information, high transportation costs, organic product certification, and limited capital become the basis for the need for analysis strategy for developing an organic rice market. The purpose of this study are: (1) identify the internal and external environmental factors, (2) formulate the best alternative strategy for the development of the organic rice market in South Lampung Regency. The research was carried out in Candipuro sub-district, based on being a center for organic rice production in South Lampung Regency. The data were analyzed qualitative and quantitative using descriptive analysis, identification of Strengths, Weaknesses, Opportunities, and Threats using IFE and EFE matrices, to obtain alternative strategies using the IE matrix and SWOT matrix. The results of the analysis show that the main weakness of the organic rice farmer group is the low performance of human resources and the limited number and types of organic products that cause a lack of market share for organic rice. The result of the IE matrix shows that the Mitra Organic Farmer Group is in the position Diversification. This policy needs to be implemented in preparation for broad diversification into various types of business activities that provide opportunities for improving the role of an institution or institution (conglomerate diversification strategy). Alternative strategies formulated based on the SWOT matrix are (1) increasing the number and types of organic products produced/product diversification, and (2) increasing institutional capacity to become cooperatives to optimize the government’s role in market accessibility and funding.
Strategy to Increase the Effectiveness of Subsidized Fertilizer Distribution: A Case Study in Indramayu Regency, West Java
Authors: Hatta Muhammad , Mujahidin Fahmid Imam , Salman Darmawan , Kurniaty
Published: April 2022

The effectiveness of the distribution of subsidized fertilizers in Indramayu Regency is still experiencing problems at the beginning of the rice planting season. This study aims to analyze: timely and targeted aspects in distributing subsidized fertilizers, implementation of the Farmer’s Card, and strategies to increase the effectiveness of subsidized fertilizer distribution. The study was conducted in Indramayu Regency, 2020. Primary data were collected from respondents: 25 lowland rice farmers, 1 fertilizer stall and 1 fertilizer distributor. In addition, secondary data was also collected. Data analysis was carried out quantitatively and qualitatively. The results showed: (1) Approximately 85% of farmer respondents stated that subsidized fertilizers were available at the stall when needed, and the rest stated that there were still delays; (2) Farmer’s Cards are one of the efforts to increase the effectiveness of subsidized fertilizer distribution, (3) Farmer’s Cards in Indramayu have been printed as many as 12, 771 farmer groups, and about 89.25% have been distributed. Strategies to increase the effectiveness of subsidized fertilizer distribution are: facilitation of subsidized fertilizer stall capital, especially those owned by farmer groups, increasing the implementation of Farmer’s Cards for subsidized fertilizer distribution and gradual improvement of the Electronic Data for the Definitive Plan for Group Needs.
Probiotic Supplementation in Feed on Nutritional Quality, Feed Efficiency, and the Growth of Vannamei Shrimp (Litopenaeus Vannamei)
Authors: Indariyanti N , Aprilia T
Published: April 2022

The increased demand for artificial feed has come from the intensification of vannamei shrimp cultivation. Feed efficiency is low since not all of the feed ingested by shrimp can be digested adequately. Supplementing probiotics in the feed to ensure that the meal is properly absorbed by vannamei shrimp, resulting in optimal shrimp development, is one of the attempts to enhance digestibility and feed efficiency. The objective of this research is to discover how adding probiotics to the nutritional content of commercial feed affects the growth and the survival of vannamei shrimp. The experimental technique and Completely Randomized Design (CRD) analysis were employed in this research, with four treatments and three repetitions: feed without probiotics (control), feed with commercial probiotic A, feed with commercial probiotic B, and feed with commercial probiotic C. Composition in commercial probiotics A (Lactobacillus casei, yeast, Saccharomyces cerevisiae), probiotics B (Bacillus subtilis, Bacillus pumilus, Bacillus amyloquefaciens, Bacillus licheniformis) and probiotics C (Lactobacillus fermentum, Lactobacillus plantarum, Bacillus coagulans, Lactobacillus lactis, Bacillus sSubtilis). The findings revealed that adding probiotics to commercial feed had an impact on the nutritional content (protein). The average survival rate of vannamei shrimp is around 94%. Treatment C produced the greatest absolute growth and FCR values. When compared to controls, the experiment of adding probiotics to the feed (all treatments) The water quality during the study’s maintenance medium was in the optimum range, with temperatures ranging from 26.5 to 30°C dissolved oxygen levels of 5.5-6.3 mg/L, and pH levels of 7.5-7.8. Treatment C produced the greatest SGR and FCR values. When compared to controls, the experiment of adding probiotics to the feed (all treatments). The conclusion of this study is that the commercial probiotic C (Lactobacillus fermentum, Lactobacillus plantarum, Bacillus coagulans, Lactobacillus lactis, Bacillus subtilis) resulted in the best shrimp growth and survival rate (SR)
Profitability of Tempeh Household Industries at Soybean Processing in Bandar Lampung
Authors: Marga Saty Fadila , Apriyani M , Fitri Annisa
Published: April 2022

Tempeh household industries is one of the food processing industries that have the potential to continue to be developing because the product is widely consumed by the community. This study aims to analyze the profitability of the tempeh household industries. The data analysis method used is the analysis of total costs, revenues, profitability, and added value by dividing them into business scales. The classification of business scale used is based on the number of daily production capacities, namely with a daily production capacity of < 50 kg, a daily production capacity of 50 - 100 kg, a daily production capacity scale of > 100 kg. The results obtained are soybean processing agro-industry with a scale of < 50 kg produces the highest profitability and added value, and is the most resistant tempeh business in the face of rising soybean prices. Tempeh household industries in Bandar Lampung within this year’s profitability value in soybean processing is on average above 18, 7%.
Entomopathogenic Fungus from Rice Rhizosphere Soil in Politeknik Negeri Lampung Land
Authors: Budiarti L , Nuryanti N S P
Published: April 2022

The killing of non-target insects such as predators, natural enemies, and pest resistance to pesticides are negative impacts of pesticide application. Entomopathogenic fungi may be environmentally friendly biological controllers. This study aimed to conduct entomopathogenic fungi from rice plants in the Politeknik Negeri Lampung field using the insect bait method. Sampling was done by taking the rhizosphere soil of rice plants using the diagonal sampling method. Isolation and characterization of the morphology macroscopic and microscopic of entomopathogenic fungi were carried out at the Plant Laboratory of the Food Crops Production Study Program, Politeknik Negeri Lampung. The study started from June to November 2021. The stages of rearing T. molitor bait insects, fishing for entomopathogenic fungi, isolation and purification and propagation of entomopathogenic fungi, observing macroscopic and microscopic morphology. The research results from the exploration of entomopathogenic fungi in the rhizosphere of rice plants obtained that the fungus that infects the insect bait T. molitor with white, green, black hyphae and then microscopically observed the shape of the conidia and hyphae. Macroscopic and microscopic results showed that the entomopathogens obtained from insect bait using T. molitor larvae from the rhizosphere soil of rice plants were Aspergillus flavus, A. niger and Fusarium sp. Aspergillus spp. macroscopic, the mycelium of the fungus was green-white and black-white colours as for the mycelium Fusarium sp. white colour. The history of land use against insecticide applications can affect entomopathogens in rhizosphere soils.
Decreasing of Crude Fibre in Indigofera Leaves Flour Hydrolysed with Cellulase Enzyme as a Source of Feed Protein
Authors: Rakhmawati R , Sofiana A , Indariyanti N , Bokau R J M
Published: April 2022

The problem of fish feed in Indonesia is currently dominated by import dependence on feed raw materials, especially fish meal and soybean meal. One alternative that currently can be chosen is indigofera leaves (Indigofera zollingeriana).The indigofera leaves used are indigofera leaves that have been cultivated by farmers in Kemiling District, Bandar Lampung City. Harvest is done at the age of 12 months. After harvesting, indigofera leaves are dried in the sun and the flouring process is carried out. Furthermore, indigofera and indigofera leaves were tested proximately and compared with commercial indigofera flour. In addition, the resulting indigofera leaf flour was hydrolyzed with cellulose enzyme at a dose of 10 g/kg for 5 days and a proximate test was carried out afterwards. The results showed leaf protein content of 19.95%, protein content of treated indigofera leaves flour 29.74% while protein content of commercial indigofera flour was 21.95% (dry weight). Meanwhile, the protein content of indigofera leaves flour which had been hydrolyzed with cellulose enzyme at a dose of 10 g/kg for 5 days increased to 31.30% and crude fiber decreased from 28.75% to 1.98%. The conclusion of this study is that the resulting indigofera leaves flour has the lowest crude fiber content and higher protein than indigofera leaves flour without hydrolysis of cellulose enzymes and commercial indigofera flour. Indigofera leaves flour hydrolyzed with cellulose enzymes resulted in a decrease in crude fiber and an increase in protein.
Isolation of Glucoamylase from Aspergillus Niger to Produce Liquid Sugar from Tapioca Flour
Authors: Rina Oktaf , Agustien Anthoni
Published: April 2022

This study aims to isolate the glucoamylase enzyme from Aspergillus niger to produce liquid sugar from tapioca flour. Enzymes are produced in a batch system laboratory-scale bioreactor. The fermentation substrate in an agar medium modified with the addition of starch. Fermentation was carried out for 168 hours at room temperature with an agitation speed of 120 rpm. The manufacture of liquid sugar is done by adding an enzyme as much as 0.3; 0.4; and 0.5 ml while the substrate concentration was varied by 20%; 30%; and 40%. The results showed that A. niger produce extracellular enzymes such as amylase and glucoamylase, particulary at exponential phase and the initial stationary phase. Enzymatic hydrolysis of starch consists of two stages, namely liquification and saccharification. In the liquification process, the enzyme α-amylase is used to break down starch containing amylose and amylopectin into dextrins. Next in the second stage is the saccharification process, where dextrin is hydrolyzed into glucose with the help of the glucoamylase enzyme. Optimal liquid sugar production can be done by adding 0.5 mL of crude enzyme extract at 30% (w/v) tapioca concentration. Further research is recommended to carry out enzyme purification to produce liquid sugar products with higher sugar purity.
Enhancement of Soybean Growth using Biological Agents Seed Treatment and Fertilization
Authors: Wahyuni A , Putri R , Hakim N A , Septiana
Published: April 2022

The provision of quality soybean seeds in Indonesia is currently still experiencing problems, especially the deterioration of soybean seeds during storage, especially when they are at the seed storage. Presently, soybean seeds that are circulating in the community are seeds that have experienced a decrease in quality. So that the soybean seeds can still be used, a special treatment is needed, specifically utilized biological agents. This technique was carried out by integrating inoculants of biological agents from the bacterial group for seed treatment before planting. In addition, to get maximum results, there needs to be a breakthrough in the cultivation system, specifically by combining chemical fertilizers and organic fertilizers. This research was carried out in the Seed Analysis Laboratory and Experimental Farm of The Seed Study Program, Politeknik Negeri Lampung on August to November 2021. This experiment was arranged using a factorial completely randomized design (CRD). The first factor was application of biological agents seed treatment which consisted of three levels, especially control/no biological agents (A0), husk charcoal powder + Trichoderma inoculant (A1), and husk charcoal powder + Pseudomonas inoculant (A2). The second factor is fertilization which consists of five levels, especially control (no fertilization (B0), 100% inorganic fertilizer dosage (B2), 100% organic fertilizer dosage + 100% inorganic fertilizer dosage (B3), 100% organic fertilizer dosage + 50% inorganic fertilizer dosage (B4) and 100% organic fertilizer dosage + 25% inorganic fertilizer dosage (B5). This research resulted application of biological agents Trichoderma asperellum and Pseudomonas aeruginosa to soybean seed treatment before planting can reduce the use of inorganic fertilizers on soybean plants. The combination of 100% organic fertilizer, 25% and or 50% inorganic fertilizer, can increased the growth of soybean plants based on the variables of plant height, leaf number and leaf width.
Pollination Compatibility of Dendrobium Polinela Lampung, and The Effect of Media Composition with Coconut Water on Seed Germination In Vitro
Authors: Maulida D , Pradana OCP , Erfa L
Published: April 2022

Efforts to increase the quality of Dendrobium orchids can be made by increasing the genetic quality through crosses while increasing the quantity can be done by propagation through in vitro culture. Information about the compatibility of an orchid species is very important to maximize the acquisition of seeds as propagation material. The seeds from the cross were propagated by in vitro culture technique. The purpose of this study was to obtain a compatible crossing method between crossing and selfing D.Polinela Lampung orchids with selected parents and to determine the effect of giving a combination of media with coconut water concentration in inducing germination and growth of orchid seeds. This study consisted of two experiments, namely (1) the compatibility test of D.Polinela Lampung orchids with three types of Indonesian orchids (D.discolour, D.leporinum, D.lasientera), and (2) the effect of basic media (MS, VW, Growmore, Gandasil) and water concentration CW (0, 50, 150, and 250 ml/1) on seedling growth of D.Polinela Lampung x D.lasientera orchids. In conclusion, among the sixteen crosses of Dendrobium orchids, ten compatibility crosses were found (pollination that produces fruit). The addition of 15 and 25% CW in the growmore medium (91.37% and 98.03%), MS (90.97% and 96.00 %), and Gandasil (90.67% and 92.67%) gave the highest percentage results. Seed germination and protocorm formation. The protocorm that forms the first leaves produced on Growmore media added with 50-150 ml/1 coconut water gave the most results compared to other treatments. The results of the research are expected as basic information in orchid propagation, especially the study of compatibility and germination of orchid seeds.
Genetic Variation and Genetic Advance of Three Elite Cassava (Manihot Esculenta Crantz) Clones Under Wet Dry Climate of Lampung
Authors: Setiawan K , Paresta R , Hadi MS , Utomo SD , Karyanto A , Najib MF
Published: April 2022

Waxy cassava having high amylopectin content could contribute and increase genetic background. Unfortunately, the genetic parameter information of three elite cassava clones as Waxy, UJ-5, and BW-1 is still limited. Consequently, the objective of this study was to evaluate the genetic variation and genetic advance of three cassava clones. This study was conducted on the Integrated Field Lab of Lampung from December 2019 to October 2020. Treatment was arranged by a single factor in RCBD with two replications. There were three cassava genotype clones, as Waxy, UJ-5 (originally Kasetsart), and BW-1 (originally Huay Bong-60). Genetics parameters were analyzed by using Minitab programs (Version 17). Variables observed were plant height, leaf number, attached leaf number, internode number, root number, tuber number, tuber fresh weight, tuber dry weight, stem dry weight, attached leaf dry weight, petiole dry weight, starch content, starch weight, and harvest index. The results showed that most variables had high genetic variation and heritability value except for starch content. Starch content showed a medium heritability value as 50%. Moreover, the genetic advance of starch content and weight were 14 and 18%, respectively. It could be concluded that an environmental factor influenced starch content.
Feed Intake and Feed Conversion Ratio of Broiler Supplemented with Herb Extract
Authors: Irwani N , Zairiful  , Habsari I K
Published: April 2022

Traditional ingredients from herbal plants can be used as antioxidants because they contain curcumin compounds that can affect the metabolic processes of the livestock body. Herbal are obtained from several rhizomes such as turmeric, ginger, lemongrass, and Curcuma. This study investigated the effects of herbal ingredients added to drinking waters. The variables observed in this study were Feed Intake, increase in body weight, and Feed Conversion Ratio. One hundred DOC of two strains were randomly assigned to four treatment groups with five replicates of 10 birds each: control (0 addition of herb ingredients), Treatment 1 (100 mg/kg BW doses of addition), Treatment 2 (200 mg/kg BW doses of addition), and Treatment 3 (300 mg/kg BW doses of addition). The data obtained were analyzed using ANOVA and Duncan’s multiple distance test. The results showed that combining the three herbs applied in drinking water improved feed intake and feed conversion ratio in broiler strains CP 707 and MB 202. However, the 5% Duncan test did not find the best interaction. Based on the results, it can be concluded that the addition of herbal ingredients (turmeric, ginger, and temulawak) affects increasing broiler productivity in different strains, both in the value of feed intake, body weight gain, and feed conversion ratio. However, the best interaction between the two broiler strains has not been obtained.
Morphological Responses of Edamame Soybean and Sweet Corn Planted in Intercropping with Combinations of Plant Populations on Three Varieties of Sweet Corn
Authors: Saputra H , Mutaqin Z
Published: April 2022

The intercropping pattern is a plant cultivation system that is very suitable for increasing productivity on marginal dry land with relatively low fertility levels. The regulation of plant population density and the selection of appropriate varieties can minimize the negative influence of competition between sweet corn and edamame soybeans to optimize the growth of both plants. The purpose of this study was to (1) determine the best plant population density in the intercropping pattern of sweet corn and edamame soybean (2) determine the best varieties in the intercropping pattern of sweet corn and edamame soybean and (3) determine the combination of plant population density and the best crop varieties in the intercropping pattern. The treatments were arranged in a factorial consisting of 2 factors. The first factor was the population density of edamame soybeans which consisted of three levels: 1 row of edamame soybeans between rows of sweet corn (B1), 2 rows of edamame soybeans between rows of sweet corn (B2), and 3 rows of edamame soybeans between rows of sweet corn (B3). The second factor is three sweet corn varieties, namely the Secada variety (V1), the Exotic variety (V2), and the Golden Sweet variety so that there are nine treatment combinations. The results showed that (1) the plant population density model of 2 rows of edamame between rows of sweet corn and sweet corn varieties Secada can produce the best sweet corn growth by increasing the wet weight of sweet corn, (2) sweet corn varieties that have the most suitable for intercropping in this research model is the Secada variety, based on plant height, the number of leaves, stem diameter, and plant wet weight, (3) edamame soybean produces relatively the same morphological growth in all population density models and sweet corn varieties used.
Minapadi Media Design for Fish and Rice Cultivation Systems in Dry Land
Authors: Nursandi J , Verdian A H
Published: April 2022

The area of agricultural and fishery land will decrease in the future. One of the potential efforts to be developed in increasing the area of agricultural and fishery land is the conversion of dry land into rice fields which is also a medium for aquaculture (minapadi). This study aims to obtain an applicable Minapadi design applied in dry land so that it can increase land productivity, expand agricultural land and efforts to increase food in the form of plants and fish. The stages of the research carried out consist of: (a). designing and building the Minapadi system (b). Minapadi system performance test (c) fish and rice cultivation (d). Conclude and provide system recommendations for fish and rice cultivation. The minapadi system starts from designing the minapadi media for dry land made by scribbling the soil, covering the pond with plastic tarpaulin, inserting the rice planting media into the pond, and arranging the air space as a place for fish to live. The performance test of the Minapadi system on dry land that has been made shows good results, namely being able to change dry management into rice fields that work as a place to grow rice while raising fish. The rate of evaporation of air in this dry land mining system is 0 - 90 liters/day, the design of the system measuring 3 m x 3 m x 0.5 m can be used as a medium for cultivating catfish, tilapia and betta with densities of 55, 22 and 11 fish, respectively/m2. The growth of rice planted on the media is quite good with the advantage that the planting media can be moved to adjust the space for fish to move. The final recommendation given is that this system has the advantage of being able to become a medium for cultivating various types of fish and possibly for growing various plants, worthy of being the choice of an integrated system model to be applied to Indonesian society in the future.
Internet of Things (IoT) Device Management in Rural Areas to Support Precision Agriculture
Authors: Mulyana Agus , Wahjuni Sri , Djatna Taufik , Sukoco Heru , Rahmawan Hendra , Nidya Neyman Shelvie
Published: April 2022

Internet of Things (IoT) devices have an important role in supporting precision agriculture systems, namely acting as the first layer consisting of several nodes in a limited network group as a producer of land, environmental and plant parameter data that will be processed at the next level. This node is an embedded system consisting of sensors, microcontrollers, power supplies and wireless communication media. The challenge that arises is when the number of new nodes that will be connected to the concentrator in a limited network group is quite large and is still done manually by the user, so that it has the potential to cause complexity and errors in configuration. The purpose of this research is to design a self-registration scheme from each new node to the concentrator in a restricted network group automatically. The method used by new nodes for self-registration is to read the RSSI (Received Signal Strength Indicator) value from the concentrator, then exchange metadata according to the OCF (Open Connectivity Foundation) standard. The concentrator will refer to the maximum number of nodes allowed to join the group and check the metadata of the new node. If the registration process is successful, the new node will gain access rights to communicate with the concentrator and its closest neighbours in the network group. This mechanism will help farmers in rural areas to be able to configure Internet of Things (IoT) devices easily and provide benefits in supporting precision agriculture.
Staple Food Price Information System in Bandar Lampung City Using JSON (Javascript Object Notation)
Authors: Sahlinal D , Maulini R
Published: April 2022

The price information system for Staple Food Prices is very helpful to the public by providing information on raw food prices for the Bandar Lampung markets. This information system allows the public to determine the price of food raw materials according to grouping: by product, by market and prices at a specific time. Investigation of information systems using data matrices and objects as alternative databases using JSON (JavaScript Object Notation), one of which applies information technology in the use of information systems with matrices and objects as others alternative databases. The results obtained are the monitoring of prices for the basic needs of the population to support the information system on the prices of basic foods. In general terms, how to monitor the price of community staples in support of the basic food price information system to capture the prices of basic community needs in each market. It is possible to use a database system with JSON in addition to an existing database, for example a relational database.
An Application of Coast Effect Correction to Magnetotelluric Data from Jailolo Geothermal Prospect Area, on the Island of Halmahera
Authors: Fahmi Fikri , Daud Yunus , Aswo Nuqramadha Wambra
Published: April 2022

Several geothermal prospect areas are situated near coastal regions. One of them is Jailolo geothermal prospect area located on the island of Halmahera. Magnetotelluric (MT) data obtained in the vicinity of the coast may be suffered from coast effect. Boundaries between ocean and land may induce severe distortion of electrical fields due to its extremely high conductivity contrast. The effect mostly distorted MT data in low-frequency and may produce some artifacts in deep parts of resistivity inversion model. In order to get a reliable subsurface resistivity model in Jailolo, a 3-D inversion of acquired MT data was carried out by including an oceanic model, which was set as a prior model, to overcome coast effect distortion. Before that, to examine coast effect influence on acquired MT data, 3-D forward modeling of a simple synthetic model was performed using a similar 3-D inversion mesh grid. Conductive seawater around survey area was also built in the mesh grid and adjusted to bathymetry data. Furthermore, synthetic MT data were then inverted in two schemes with and without oceanic model. Based on inversion results, use of oceanic model can significantly improve inversion result and give a more comparable inversion model with a synthetic model. Meanwhile, 3-D inversion of real MT data, which was carried out with a similar approach, successfully produces a representative subsurface resistivity model to describe geothermal system in study area.
Surface Thermal Manifestation Mapping in Kamojang Geothermal Field, West Java, Indonesia
Authors: Yuda Kencana Aditya , Rina Herdianita Niniek
Published: April 2022

Kamojang Geothermal Field is located in Bandung, West Java, Indonesia. Since 1978, this field has been producing electricity with total capacity about 235 MWe. Surface thermal manifestation monitoring is a powerful tool to monitor changes of reservoir condition. The investigation aimed at mapping new thermal manifestations and ground temperatures in Kamojang crater. The method employed is field mapping using drones and tracking. Ground temperatures were acquired directly in the field by measuring at 20 cm depth. Geologically, Kamojang Crater area is dominated by volcanic rocks such as andesite lava, pyroclastic breccia, tuff, and lapilli. It has undergone moderate to very strong alteration into clay, silica, iron oxide, and anhydrite minerals. The main geological structures that play a role in Kamojang area are Kendang, Patengteung, and Citeupeus Fault systems. Surface manifestations discharged in Kamojang area consist of mud pools/vents, hot springs/pools, steaming ground, and steam vents that are controlled by Citeupeus and Pateungteung Faults with a NE-SW orientation. The area was later referred to as Kamojang Crater, which consists of Manuk, Berecek, Sakarat, Kamojang, Kereta Api, Cikahuripan, Hujan, Loutak, Baru, Saar, and Inactive Craters. Several new hot spots have not been mapped in detail by previous research, including Timur Crater, Mud Pool Complex, and Tengah Crater. Meanwhile, an Inactive Crater to the north of study area indicates activity shown by boiling and bubbling hot pool. The thermal manifestation has a high temperature of 50.4 to 94.7°C. Manifestations in the form of liquids (mud and water) have an acidic fluid, with a pH ranging between 1.30 and 5.50. Ground temperatures in Kamojang Crater area range from 17 to 95°C. High temperature areas of 80 - 95oC are associated to thermal manifestations.
Reservoir Dynamics Monitoring in A Liquid Dominated Geothermal Field Based on Surveillance Data and Tracer Flow Test
Authors: Arif Wijaya Basuki , Berian Pratama Heru , Ashat Ali , Sutopo  , Dawud Hidayaturrobi Abu
Published: April 2022

Two common characteristics changes in the liquid-dominated reservoir because of exploitation are a decrease in temperature in the liquid reservoir zone (due to injection breakthrough) and the development of a steam zone (because of lower liquid water level). Both phenomena are observed by using the tracer flow test (TFT) technique. The comprehensive analysis using enthalpy from TFT data, combined with the data of chloride in brine, NCG in steam, and subsurface temperature (from PT logging), can be used to identify the dynamics of the reservoir processes. The application of the comprehensive analysis is selected for this study by taking those various monitoring of surveillance programs from a liquid-dominated geothermal system. In the selected geothermal field, which the operation began in 1994, an injection breakthrough occurred in the western part of the field. On the other side, the development of a steam reservoir was observed in the eastern part of the field. TFT monitoring is carried out every three months in each active production well as stated in the surveillance program. Other chemical monitoring and (PT) log data are also carried out periodically. Two wells from the studied field are selected, in which one well experience with injection breakthrough and the other one is in steam cap development. Comprehensive analysis results from TFT data, geochemical monitoring data (NCG and Cl), and subsurface temperature are used to understand the dynamics in geothermal reservoirs. Injection breakthrough in production well is indicated by changes in chloride content, decrease in enthalpy and NCG in the steam. Whereas the formation of steam cap will be characterized by an increase in enthalpy and NCG. With a thorough understanding of the changing conditions in the reservoir, recommendations for appropriate surveillance strategies can be formulated to maintain an optimal and sustainable generation process.