Journal of Applied Agricultural Science and Technology最新文献_第6页

Better Cotton: An Approach to Sustainable Agriculture 优质棉花:可持续农业的途径

Journal of Applied Agricultural Science and Technology Pub Date : 2022-02-28 DOI: 10.55043/jaast.v6i1.35

Noor Nabi Bhutto, Absar Mithal Jiskani, Ghulam Mustafa Nizamani

引用次数: 1

Effect of Different Coagulants and Various Concentrations on Quality of Jack Bean Tofu 不同混凝剂及浓度对豆腐乳品质的影响

Journal of Applied Agricultural Science and Technology Pub Date : 2021-09-27 DOI: 10.32530/jaast.v6i1.23

R. Yanti, W. Setyaningsih, P. Triwitono, Richa Yuniansyah, Ermi Saraswati Maha Admi

引用次数: 2

Potential of Intercropping of Oil Palm (E. guineensis Jacq.) and Liberica Coffee (C. liberica L.): A Case Study in Smallholder Plantation 油棕(E. guineensis Jacq.)与利比里亚咖啡(C. Liberica L.)间作在小农种植园的潜力研究

Journal of Applied Agricultural Science and Technology Pub Date : 2021-08-31 DOI: 10.32530/jaast.v5i2.22

E. Firmansyah, A. Umami

{"title":"Potential of Intercropping of Oil Palm (E. guineensis Jacq.) and Liberica Coffee (C. liberica L.): A Case Study in Smallholder Plantation","authors":"E. Firmansyah, A. Umami","doi":"10.32530/jaast.v5i2.22","DOIUrl":"https://doi.org/10.32530/jaast.v5i2.22","url":null,"abstract":"Oil palm (Elaeis guineensis Jacq.) has become the main plantation commodity in Indonesia. Climate change phenomena and competitiveness fluctuation of palm oil commodities have led to increased need for optimized land productivity while maintaining sustainability. This research aimed to study the potential of oil palm intercropping with liberica coffee (Coffea liberica L.) in several smallholder oil palm plantations in Riau Province, Sumatera Island, Indonesia. Measurements in the middle of the non-harvesting path of oil palm showed the age of oil palm is directly proportional to the difference between air and soil temperature and relative humidity under canopy. Oil palm roots were dominantly distributed vertically in solum 0 - 30 cm and always dominant compared to coffee at all horizontal distances observed. While the dominant root coffee distribution was in solum 31 - 60 cm. Analysis results show the tap roots extend no further than 30-45 cm below the soil surface. It was known that oil palm roots are dominantly distributed at a distance of 2-3 m from the trunk while the coffee roots are dominantly distributed at a distance of 1-2 m from the trunk. Analysis of oil palm yields in the intercropping system showed no significant decrease compared to monocropping systems with relatively the same age and production input. Coffee production per tree has decreased by 25-30% compared to the average production in monocropping systems. ","PeriodicalId":33922,"journal":{"name":"Journal of Applied Agricultural Science and Technology","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79670522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metal Oxides as Soluble Nano Catalyst on Biodiesel: A Review 金属氧化物作为可溶性纳米催化剂用于生物柴油的研究进展

Journal of Applied Agricultural Science and Technology Pub Date : 2021-08-31 DOI: 10.32530/jaast.v5i2.27

S. Pambudi, A. Triono, M. Asrofi, Iid Mufaidah, Y. Variyana, R. A. Ilyas

{"title":"Metal Oxides as Soluble Nano Catalyst on Biodiesel: A Review","authors":"S. Pambudi, A. Triono, M. Asrofi, Iid Mufaidah, Y. Variyana, R. A. Ilyas","doi":"10.32530/jaast.v5i2.27","DOIUrl":"https://doi.org/10.32530/jaast.v5i2.27","url":null,"abstract":"Nano particles of metal oxide developed as soluble nano additive in liquid fuels to improve fuel quality. One application of nano metal oxide particles is an additive to biodiesel. Biodiesel is an alternative fuel that can reduce dependence on fossil fuels. Pure biodiesel has a relatively lower calorific value compared to fossil fuels. Low calorific value results in increased brake specific fuel consumption. Moreover, biodiesel has a higher density and viscosity compared to fossil fuel. The content of carbon monoxide (CO), unburned hydrocarbons (HC) and nitrogen oxide (NOx) in exhaust gases with biodiesel is higher than fossil fuels. Metal oxide nanoparticles are added to biodiesel between 6 to 80 nm with concentrations about 50 to 500 ppm. Addition of metal oxide nanoparticles to biodiesel can improve brake thermal efficiency, reduce brake specific fuel consumption, carbon monoxide (CO), unburned hydrocarbons (HC), nitrogen oxide (NOx) and improve carbon dioxide (CO2) emission due to the catalytic effect of metal oxide nanoparticles. Metal oxide acts as an oxidation catalyst thereby reduce the carbon combustion activation temperature and thus enhances hydrocarbon oxidation, promoting complete combustion. Nanoparticles that are often used in various studies are nickel (II) oxide (NiO), cerium (IV) oxide (CeO2), titanium oxide (TiO2), zinc oxide (ZnO), aluminum oxide (Al2O3), and silicon dioxide (SiO2). This review paper describes the progress and development of nano metal oxide applications as additives for biodiesel, and the discussion in this paper is divided into 3 main topics, including the effects of nanoparticles on the properties of biodiesel, engine performance, and emission characteristics.","PeriodicalId":33922,"journal":{"name":"Journal of Applied Agricultural Science and Technology","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78194991","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Effect of Tofu Liquid Waste and Organic Mulch on the Growth of Cocoa (Theobroma Cacao L.) Nursery Plants in a Polybag 豆腐废液与有机地膜对可可生长的影响苗圃植物在一个塑料袋

Journal of Applied Agricultural Science and Technology Pub Date : 2021-08-31 DOI: 10.55043/jaast.v6i2.56

Ifan Aulia Candra, Eri Samah

{"title":"The Effect of Tofu Liquid Waste and Organic Mulch on the Growth of Cocoa (Theobroma Cacao L.) Nursery Plants in a Polybag","authors":"Ifan Aulia Candra, Eri Samah","doi":"10.55043/jaast.v6i2.56","DOIUrl":"https://doi.org/10.55043/jaast.v6i2.56","url":null,"abstract":"This study aims to examine the influence of the concentration level of organic tofu liquid waste and rice straw mulch on the growth of cacao (Theobroma cacao L) seedlings. It was carried out using three variables, namely the concentration of tofu liquid waste and four treatment levels. These include treatments without tofu liquid waste 0 ml/kg/plant (T0), and with 60 ml/kg/plant (T1), 80 ml/kg/plant (T2), and 100 ml/kg/plant (T3), respectively. Furthermore, rice straw organic mulch factor with three levels, namely 15 gr/plant (15 tons/ha) (M1), 20 gr/plant (20 tons/ha) (M2), and 25 gr/plant (25 tons/ha) (M3) was also used. The results indicated that the concentration of liquid organic fertilizer derived from tofu liquid waste significantly affected plant height at the age of 3 months. The tallest plant measured 64.78 cm in height, with 21.33 leaves, stem diameter of 0.72, and leaf area of 17.58 cm2. Organic rice straw mulch did not have a significant effect on all plant factors. This showed that the application of liquid organic fertilizer tofu waste influences plant height, leaf number, and stem diameter, and there is no effect on the leaf surface, while rice straw mulch did not alter all plant variables.","PeriodicalId":33922,"journal":{"name":"Journal of Applied Agricultural Science and Technology","volume":" 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72381041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Growth and Yield of Soybean on Various Types and Concentrations of Liquid Organic Fertilizer in Ultisols 不同类型和浓度的有机液体肥料对大豆生长和产量的影响

Journal of Applied Agricultural Science and Technology Pub Date : 2021-08-31 DOI: 10.32530/jaast.v5i2.28

H. Pujiwati, N. Setyowati, Desi Dwi Wahyuni, Z. Muktamar

引用次数: 1

Phenotypic Variability of The F2 Populations Derived from Crosses Between Local and Introduced Okra Cultivars 地方秋葵品种与引种秋葵杂交F2群体的表型变异

Journal of Applied Agricultural Science and Technology Pub Date : 2021-08-31 DOI: 10.32530/jaast.v5i2.30

P. Hayati, Mairati Mandwi Yld, S. Sutoyo, M. Zaitialia

{"title":"Phenotypic Variability of The F2 Populations Derived from Crosses Between Local and Introduced Okra Cultivars","authors":"P. Hayati, Mairati Mandwi Yld, S. Sutoyo, M. Zaitialia","doi":"10.32530/jaast.v5i2.30","DOIUrl":"https://doi.org/10.32530/jaast.v5i2.30","url":null,"abstract":"Okra (Abelmoschus esculenthus) is a vegetable plant consumed in immature and tender texture fruits. Crosses of local okra with introduced varieties are carried out to improve the character of the local cultivars. This study aimed to assess the variability of agronomic characters, both quantitative and qualitative characters of various families of the F2 populations and select superior families that can be used to produce new cultivars. The F2 population was derived from inbreeding and selection of the crosses between local okra cultivars with B291 and Ve022 as introduced cultivars. The study used an experimental method with an individual observation. Qualitative characters were described based on the descriptor by IBPGR, while quantitative characters were analyzed using descriptive statistics. Results showed variation in each F2 family in plant height, the number of flowers per plant and the number of fruits per plant, except for SOMB291-16. FOHVE022-8, FOHB291-15, FOHVE022-17, SOMB291-23 and SOMB291-24 families could be selected due to the extended picking time were in line with the increase of fruit quality. A broad variability of quantitative characters was found for all characters, indicating a high opportunity to obtain valuable traits and desirable segregants in F2 populations. Variations in qualitative characters were found in stem color, leaf shape, fruit color and fruit shape. The selection of plants with specific characters could be maintained with inbreeding or self-pollinated desirable segregants.","PeriodicalId":33922,"journal":{"name":"Journal of Applied Agricultural Science and Technology","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81784898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Reciprocal Effect Between Soil Water Content and The Soil Bulk Density on The Growth and Yield Of Onion (Allium cepa L.) 土壤含水量和土壤容重对洋葱生长和产量的互反效应

Journal of Applied Agricultural Science and Technology Pub Date : 2021-08-31 DOI: 10.32530/jaast.v5i2.26

Pou Anda

{"title":"The Reciprocal Effect Between Soil Water Content and The Soil Bulk Density on The Growth and Yield Of Onion (Allium cepa L.)","authors":"Pou Anda","doi":"10.32530/jaast.v5i2.26","DOIUrl":"https://doi.org/10.32530/jaast.v5i2.26","url":null,"abstract":"The SWC and the SBD play an important role in determining soil’s suitability for agricultural uses because they affect various physical, chemical, and biology of soil properties. This field experiment aimed to investigate the reciprocal effect of the SWC and the SBD on the growth and yield of onion (Allium cepa L.). The experiment was layout in a randomized complete block design (RCBD) with three replications. This experiment consisted of one factor, namely, water (A) with four levels, namely, (A0=0 liter, A1=4 liters, A2=8 liters, and A3=16 liters), and one variety endemic of local Tomia (V). The treatment consisted of A0V, A1V, A2V, and A3V. Parameters observed including plant height, leaf width, fresh bulb and dry bulb weight. The results showed that the different water levels treatment had a highly significant (p<0.01) affected the SWC and SBD. Also, simultaneously the SWC and the SBD had a high significance (p<0.01) reciprocally influenced the plant height, leaf width, fresh and dry weight of onion. When the SWC increase, the growth and the yield of onion increase, and when (SBD) decreases, the growing and the yield parameters increases. The best result occurred at the pair of SWC and SBD values of (28.52 %, 1.2 g.m3) with 33.07 cm plant height, 1.3 cm leaf width, 51.67 g fresh weight, and 44.33 g dry weight, followed by other pair of values of SWC and SBD. Through graphs, the analysis showed that SWC has a positive effect and SBD has a negative influence on the growth and yield of onion except at an appropriate value.","PeriodicalId":33922,"journal":{"name":"Journal of Applied Agricultural Science and Technology","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77829239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Prospect of Knowledge Growing System (KGS) for Plant Disease Early Detection System 知识生长系统(KGS)在植物病害早期检测系统中的应用前景

Journal of Applied Agricultural Science and Technology Pub Date : 2021-03-10 DOI: 10.32530/JAAST.V5I1.19

I. Syamsiana

引用次数: 0

Identification of Local Rice Genotypes from Deli Serdang, North Sumatera, Indonesia to Drought Stress Condition 印尼北苏门答腊Deli Serdang地区水稻基因型对干旱胁迫的鉴定

Journal of Applied Agricultural Science and Technology Pub Date : 2021-03-10 DOI: 10.32530/JAAST.V5I1.4

I. Chaniago, Noverina Chaniago, I. Suliansyah, N. Rozen

{"title":"Identification of Local Rice Genotypes from Deli Serdang, North Sumatera, Indonesia to Drought Stress Condition","authors":"I. Chaniago, Noverina Chaniago, I. Suliansyah, N. Rozen","doi":"10.32530/JAAST.V5I1.4","DOIUrl":"https://doi.org/10.32530/JAAST.V5I1.4","url":null,"abstract":"Regency of Deli Serdang in the Province of Sumatera Utara has high diversity of landrace rice that has adapted to various climatic and edaphic condition including drought. Studies on various local rice genotypes tolerant to drought is of important to be carried out. This will help plant breeders with germplasms for future breeding program. Polyethylene glycol (PEG) is a water-soluble compound with high osmotic pressure and unlikely to have specific interaction with biological chemicals. With these properties, PEG is often be used in studies of plant response to drought stress. The experiment reported here was aimed at determining rice genotypes, local to Regency of Deli Serdang, tolerant to drought. The experiment was carried out at Laboratory of Physiology and Glass House of Faculty of Agriculture, Universitas Islam Sumatera Utara, Medan from February to April 2020. A two-way factorial experiment was assigned in a completely randomized design (CRD) with 3 replicates. The first factor was 23 local rice genotypes plus 4 genotypes tolerant to drought and the second factor was the concentration of PEG 6000 i. e 0 and 20% (w/v). Observations included percent of germination, plant height, length and number of roots protruding from paraffin-wax layer, leaf chlorophyll content, seedling fresh and dry weight, index of tolerance, probability of resistance, and proline content. Data were analyzed with analysis of variance and mean separation of DNMRT at 5%. Results demonstrated that 6 local rice genotypes, Gemuruh, Ramos Merah, Arias, Sialus, Silayur, and Sirabut were resistant to drought stress under the experimental condition.","PeriodicalId":33922,"journal":{"name":"Journal of Applied Agricultural Science and Technology","volume":"295 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86448628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0