Journal of Applied Agricultural Science and Technology

Journal Information
ISSN / EISSN : 26214709 / 26212528
Current Publisher: Politeknik Pertanian Negeri Payakumbuh (10.32530)
Total articles ≅ 56
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Verry Yarda Ningsih, Nenny Wahyuni, Nila Suryati, Noviyanto Noviyanto, Heriyanto Heriyanto
Journal of Applied Agricultural Science and Technology, Volume 4, pp 26-35; doi:10.32530/jaast.v4i1.147

Abstract:
Palm oil is an edible vegetable oil derived from the mesocarp (reddish pulp) of the fruit of the oil palm, primarily the African oil palm Elaeis guineensis. Oil palm is one of agriculture comodity that can increase farmers income, provide raw material on manufacture industry which can create added value. The expansion of oil palm farming in Indonesia has shifted the use of mineral land to suboptimal land which is currently available in many place in Indonesia. Generally the aim of this research is to anylize the competitiveness sensitivity of oil palm farming. Specifically this research wants to anylize the sensitivity on input-output changing, and to anylize the impact of government policy on input-output when facing fluctuation price. In order to reach the goal of this research we used Policy Anlayisis Matrix (PAM). The result of this research shows that partially the declining of price, declining of output volume and increasing input price PCR value and DRCR < 1, which means that the oil palm farming on suboptimal land has competitivenes, and the absence of government policy on determaining input price nor output price on oil palm farming in at suboptimal land. While simultanously shows that the fluctuation of input and output price causes value of PCR dan DRCR > 1 with PCR value 1,12 and DRCR value 1,04, means that oil palm farming on suboptimal land at Musi Rawas Regency not feasible and has no competitiveness. It means that government policy needed to protect input price in oil palm farming on suboptimal land. Therefore government support and guidence in oil palm farming technology on suboptimal land also needed to increase the production of oil palm farming on suboptimal land.
Renny Eka Putri, Rizka Fadhilah, Dinah Cherie, Azkiya Wahyu Novianda
Journal of Applied Agricultural Science and Technology, Volume 4, pp 12-25; doi:10.32530/jaast.v4i1.152

Abstract:
Energy Consumption in the agricultural sector consists of diesel, gasoline, and kerosene for fuel of agricultural machinery (rice transplanter, tractor, rice milling unit, motor sprayer, and water pump) in the sector. The objectives of this study are to determine the total energy consumption of rice planting and to analyse the performance of rice transplanter during rice planting in West Sumatra, Indonesia. This research was conducted on farmer's rice fields in west Sumatera Indonesia. The results obtained from the performance of a rice transplanter machine include working speed of 0.633 m/s, a theoretical work capacity of 0.274 ha/hour, effective work capacity of 0.222 ha/hour and work efficiency of 80.967%. The detail of energy consumption using a rice transplanter are human energy (9.225 MJ/ha), seed energy (255.413 MJ/ha), fuel energy (93.463 MJ/ha) and engine energy (0.821 MJ/ha), so that the total energy consumption is 358.952 MJ/ha.
I K Budaraga, Dian Pramana Putra, Wellyalina Wellyalina
Journal of Applied Agricultural Science and Technology, Volume 4, pp 56-63; doi:10.32530/jaast.v4i1.130

Abstract:
The layer cake is one of the traditional cakes that are very popular with the community. The addition of Moringa leafs is expected to extend the period of storage and the components of the nutrition can be increased. Moringa leaves indicate to contain an antibacterial compound that is the result of secondary metabolites. This compound consists of alkaloids, tannins, flavonoids, terpenoids, saponins, and others. The purpose of this study was to determine the antibacterial properties of Moringa leaves added to layer cake against pathogenic bacteria S. aureus and E. coli. Research has been implemented on April - May 2019. The testing of antibacterial activity by using well method. The results showed that the layer cake with the addition of 4% Moringa leaves indicated the high inhibition zone on the bacteria E. coli by 10.7 mm and S. aureus by 9.7 mm when compared with the addition of 1%, 2%, and 3 % Moringa leaves. The result of bacterial pathogens that were tested in Moringa leaves showed that the bacteria E. Coli had resistance to more robust compared with S. Aureus. This is indicated by the inhibition zone of E. coli that is greater than S. aureus bacteria.
Indra Laksmana, Hendra Hendra, Sri Aulia Novita, Fithra Herdian, Mohamad Riza Nurtam, Perdana Putera, Rosda Syelly
Journal of Applied Agricultural Science and Technology, Volume 4, pp 64-75; doi:10.32530/jaast.v4i1.156

Abstract:
Difference and variation of leaves shape is usually used as primary identifier of the plant species. But some plants may have a similar leaf shape and thus require another more accurate identifier. This study applied principal component analysis (PCA) methods for identifying tropical plant species from the shape of the leaves. This method simplified the observed variables by reducing the dimensions of the information that is stored as much as 75%, so it did not eliminate important information and can save the data processing time. There were 100 images of leaves taken from several sides of the leaf in JPEG format with which the shape of leaves were look similar, like citrus (Citrus aurantifolia), durian (Durio zibethinus), guava (Psidium guajava), mango (Mangifera indica), jackfruit (Artocarpus heterophyllus), avocado (Persea americana), rambutan (Nephelium lappaceum), sapodilla (Manilkara zapota), red betel (Piper crocatum) and soursop (Annona muricata). Identification of those 10 kind plant leaves produced 97% accuracy rate. Measurement systems were designed using the K-fold Cross Validation with k = 10, the results of experiments shown omission error occurs on the leaves of guava, jackfruit and red betel while twice commission error were found on the leaves sapodilla and once on citrus leaves.
Raghu M J, Govardhan Goud
Journal of Applied Agricultural Science and Technology, Volume 4, pp 3-11; doi:10.32530/jaast.v4i1.137

Abstract:
The present work investigates the effect of water absorption on mechanical properties of calotropis procera fiber reinforced epoxy polymer composites. The calotropis procera fiber chemical and mechanical testing was done to evaluate chemical composition and strength of the fiber. The composites are fabricated by reinforcing calotropis procera fiber in epoxy matrix by varying the fiber wt. % by traditional hand layup method. The water absorption of calotropis procera reinforced epoxy polymer composites at room temperature was found to increase with increasing fiber loading. The mechanical testing results of moisture exposed composites indicated decreased strength which may be due to degraded bonding between fiber and matrix.
Rince Alfia Fadri, Kesuma Sayuti, Novizar Nazir, Irfan Suliansyah
Journal of Applied Agricultural Science and Technology, Volume 4, pp 36-55; doi:10.32530/jaast.v4i1.135

Abstract:
One of the types of coffee cultivated in Solok Regency is Arabica Coffee (Coffea Arabica L). The quality of the coffee produced can be influenced by the proper harvesting and post-harvest process so as to produce ground coffee with good quality. This research is done by the method of observation, descriptive, and hedonic test. Ground coffee produced in Solok Regency has a semi-mechanical harvesting process while the post-harvest process begins with the release of the skin and meat of the fruit, subsequent drying, and release of the skin of horns, sorting and grading, roasted, milling and packaging. This research aims to study the processing and quality of Arabica Ground Coffee in Solok Regency.
Edi Syafri, Sanjay Mavinkere Rangappa, Nasmi Herlina Sari
Journal of Applied Agricultural Science and Technology, Volume 4, pp 1-1; doi:10.32530/jaast.v4i1.159

Fri Maulina, Novri Nelly, Hidrayani Hidrayani, Hasmiandy Hamid
Journal of Applied Agricultural Science and Technology, Volume 4, pp 76-85; doi:10.32530/jaast.v4i1.150

Abstract:
The species of egg parasitoid in rice bug is necessary to know to be used as biological agent in the field. The research aimed to determine spesies of parasitoid, diversity index, parasitization level and parasitoid mortality which found in rice bug eggs in rice fields in West Sumatra. Purposive random sampling was used in this research for determining the sampling locations. Collecting eggs sampling was conducted for 1 km along transect line in sampling location. The collected eggs of 12 sampling locations then observed and identified in Laboratory of Insect Bioecology, Faculty of Agriculture, Andalas University. The result showed that the kind of egg parasitoid found in the field were Hadronotus leptocorisae and Ooencyrtus malayensis with each parasitization level were 22.3 ± 11.1 % and 4.2 ± 5.3 %, each the mortality were 57.8 ± 26.4% and 30.6 ± 37%, the diversity of egg parasitoid was low with the index 0.3858 Based on Shannon-Wienner.
Sri Aulia Novita, Hendra Hendra, Jamaluddin Jamaluddin, Muhammad Makky, Khandra Fahmi
Journal of Applied Agricultural Science and Technology, Volume 3, pp 299-308; doi:10.32530/jaast.v3i2.112

Abstract:
The quality of rubber processed materials, that is produced by the farmer is generally low and can be seen from their colour, pollutants levels, foul odour and the very cheap price. To improve the quality of the rubber should be done both in terms of its treatment and processing equipment. The main objective of this research is to enhance and improve the quality of farmer's rubber processed materials by using natural coagulant which liquid smoke to agglomerate the rubber, and designing of rubber grinding machine. The component of rubber grinding machine including hopper, regulating entry materials, three rollers, pulleys and belt, outlet, gears, engine, regulating the thickness and chassis. In this research, the thickness rubber after grinding is 3-5 mm accordance with Indonesian National Standard rubber. Processed material rubber produced is white and no pollutants. The coagulant used was liquid smoke with a concentration of 10 -20%, where this addition affects the agglomeration speed of rubber and smelled slightly of smoke. The average rate of Feed is 48.58 kg / h, a capacity of the machine is 37.40 kg/hr and cost of operation is Rp. 650 / kg.
I K Budaraga, Eva Susanti, Asnurita Asnurita, Elliza Nurdin, Ramaiyulis Ramaiyulis
Journal of Applied Agricultural Science and Technology, Volume 3, pp 226-238; doi:10.32530/jaast.v3i2.106

Abstract:
Agricultural and plantation wastes, especially cocoa plants, have not been widely used, although in some conditions they have potential as animal feed ingredients and raw materials for composting. So needs a program potential utilization of waste produced by the plant cocoa is cocoa shell waste such as being liquid smoke. Liquid smoke is a natural food preservative. One of the advantages of liquid smoke is antioxidant compounds. This study aims to know the antioxidant activity of cocoa shell liquid smoke on a variety of different water content. This research is an experimental quantitative descriptive method so that an analysis of the antioxidant activity of liquid smoke from cocoa peel is obtained. The results showed that the liquid smoke of cocoa peels at a moisture content of 25%, 20%, 15%, and 10% had strong antioxidant activity because the IC 50 values obtained were below 50 ppm.
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