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Rachma Wikandari
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Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia
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agriTECH
Published by Universitas Gadjah Mada
ISSN : 02160455     EISSN : 25273825     DOI : 10.22146/agritech
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Agritech with registered number ISSN 0216-0455 (print) and ISSN 2527-3825 (online) is a scientific journal that publishes the results of research in the field of food and agricultural product technology, agricultural and bio-system engineering, and agroindustrial technology. This journal is published by Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta in colaboration with Indonesian Association of Food Technologies (PATPI).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 6 Documents
 1 
Search results for , issue "Vol 18, No 4 (1998)" : 6 Documents clear
Perubahan Lingkungan Fisik Tanah Sawah Dengan Penambahan Bahan Organik Pada Berbagai Cara Pemberian Air Harsono Harsono
agriTECH Vol 18, No 4 (1998)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2333.321 KB) | DOI: 10.22146/agritech.19351

Abstract

The problem faced by the flooded rice field are the deficiency of nitrogen, phosphorus and potassium, the toxic of Fe, Mn, Al, and Bo to plant. When the puddled soil are dried the structure of soil becomes massive. Hard consistency caused the roots of crop do not able to penetrate the soil. To overcome those problems, the research of the addition' of organic matter into the soil under various method of irrigation was conducted. The experimental design strip split plot design was used. The treatments were the method of irrigatiOn as horizontal factor (a), duration of organic matter incorporated into the soil as vertical factor (b). The kind of organic matter as subplot factors (c). The crops to be tested were rice (IR - 36) and soybean. The field experiment was carried out in KP4 UGM experiment station, Berbah, Sleman Yogyakarta. The results of this experiment indicated that the bulk density increased with time from the plowing up to the harvest. However, the hydraulic conductivity of soil decreased. The lowest bulk density was in the plots buried by straw (0.85 gr/cm3) and the highest was buried by the leaf of gliriside (Glericidia sepium) (0.96gr/c). The addition of organic matter into the soil increased nitrogen, phosphorous and potassium. The residue effects of those treatments on soil grown by the soybean indicated that the soil aggregate of 2 mm increased by 40% in the plots buried by the straw. The highest yield of rice was on the plots buried by leaf of gliriside under the intermittent irrigation with the yield as higher as 6.53 ton/ha.
An Expert System For Comprehension of Forage Crops and Utilization on Pasture System Mongkon Ta-oun; Mohamed Daud; Mohdzohadic Mohdzohadic; Shamshudin Jusup
agriTECH Vol 18, No 4 (1998)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2666.33 KB) | DOI: 10.22146/agritech.19352

Abstract

The knowledge based of expert system for comprehension of forage crops and utilization on pasture system could be extracted from domain experts and established literatures for preparing an expert system skeleton. This system was developed by CLIPS program. The skeleton of the expert system is divided into four main parts; information, pasture management and prediction. The introduction part will help user to get general information of forage crops and the important environmental factors of many processes so that user can understand the process components in pasture establishment. The pasture management part explains the principle of managing the pasture for sustainable utility and gaining continuously and sufficiently high yield of crops and animal production. The last part is prediction part, to illustrate principle of factors and algorithms using in decision making / prediction the selection of forage crop varieties on pasture establishment; furthermore, in this part has model for predicting groundwater pollution vulnerability of the existing environment of pasture which will be established.
Optimasi Model Persediaan Produk Makanan Ternak Pada Tingkat Distributor di Propinsi Daerah Istimewa Yogyakarta Kuncoro Harto Widodo
agriTECH Vol 18, No 4 (1998)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2133.589 KB) | DOI: 10.22146/agritech.19353

Abstract

Inventory management is a general problem in manufactures, service companies, government institutions included feedmill distributor. Inventory policy in those institutions are determined by several objectives which the main are minimizing the total cost or investment inventory, the consumer satisfaction and maximizing the output efficiency. Structural problems related with feedmill inventory consists of total cost inventory, order quantity and reorder point. Economic Order Quantity (EOQ) model is one of tools in order to solve problems above, in detail this tool is used to optimize feedmill inventory in the distributor level, especially in the feedmill manufacturing product, the milled corn and the rice sifting components. The result of the research shows that by using the EOQ model, there is a total cost inventory reduction, such as the feedmill manufacturing product decrease from 8,046,778 rupiahs to 1,890,865 rupiahs, the milled corn component from 1,785,721 rupiahs to 103,310 rupiahs and total cost inventory for the rice siftings component decrease from 598,812 rupiahs to 96,686 rupiahs. Based on the final result above, it is summarized that the EOQ model instrument minimized the total cost inventory in feedmill product on the distributor level.
Pemutihan dan Pengikatan Silang Pati Sagu dan Penggunaannya Untuk Bahan Substitusi Pada Pembuatan Bihun Chatarina Lilis Suryani; Haryadi Haryadi
agriTECH Vol 18, No 4 (1998)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1181.829 KB) | DOI: 10.22146/agritech.19354

Abstract

Bleaching sago starch was conducted by using Ca002 and NaOCI ranging from 0.00-1.00% with continuous mixing. The use of CaOCl2 at 0.75% gave whitest starch, therefore bleaching using this method was adopted to produce starch for further treatment.The bleached starch was subjected to cross-linking using POCE3 ranging from 0.000-0.025%. Degree .of substitution of the modified starch were 0.0000-0.0018. Higher POCl3 addition resulted higher degree of substitution, with consequences of higher temperature of gelatinization, higher stability of the pastes and higher viscosity of the gels. The cross-linked starch could be used to substitute rice in rice noodle making at 20-60%. Higher degree of substitution and higher proportion of modified starch used gave higher breaking strength and stronger texture of the resulted noodle compared to that made from 100% of 1R-36 rice.
Pengaruh Jenis Pengekstrak dan Jenis Pati Terhadap Sifat Gel Cincau yang Dibuat Dengan Ekstraksi dan Pemasakan Optimal Bangun P. Nusantoro; Haryadi Haryadi; Supriyadi Supriyadi
agriTECH Vol 18, No 4 (1998)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1876.077 KB) | DOI: 10.22146/agritech.19355

Abstract

Black cincau (Mesona palustris) gel is made traditionally by boiling a mixture containing the alkaline extract of the herb and starch followed by cooling to room temperature. In this study, herb extraction time and boiling time of the mixed stuff were optimized based on the smallest degree of syneresis of the gel following cold storage. The alkaline solutions use were solution of qi (traditional alkali) ash and of NaOH at pH 11 and the starches were of tapioca, aren (Arenga pinata) and sago. Effects, of type of alkaline solutions and different starches on the characteristics of gel were also studied. The optimum extraction time using qi ash 4% was 70 min. When the extraction using NaOH at pH 11 was effected, it needed 60 min to get the extract which resulted the most stable gel. The optimum boiling time of the qi extract mixed with tapioca, aren, and sago starches were 60, 40, and 50 min, respectively. Boiling the NaOH extract mixed with tapioca, aren, and sago starches needed 70, 40, and 50 min, respectively, to get the best result. Extraction using qi 4% gave higher total solid of the extract and higher pH of the gel. The highest breaking strength of the gel was produced when the fornulae comprising qi solution and aren was adopted. The gels made from qi extract boiled along with aren and sago starches gave more acceptable gels than that along with tapioca starch. Extraction using the NaOH solution improved the acceptability of the gel made with tapioca starch.
Resistant Starch : Pembentukan, Metabolisme, dan Aspek Gizi-nya Y. Marsono
agriTECH Vol 18, No 4 (1998)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2306.969 KB) | DOI: 10.22146/agritech.19356

Abstract

"Resistant starch (=RS)" is defined as the sum of starch and products of starch degradation not absorbed in the small intestine of healthy individuals. The presence of RS can be influenced by some factors including processing, the type of starch (amylase or amylopectin), the physical state of the starch (degree of hydration, particle size) and the presence of other components (i.e. lipids and fiber). in the large intestine, RS is fermented (as dietary fiber) by anaerobic bacteria. The major end product of fermentation are Short Chain Fatty Acids (SCFAs: acetate, propionate and butyrate) and gases (CH4, CO2 and H2.). The important physiological effects of RS are due not to the RS itself but also the SCFAs. Among the physical properties of RS are increase the viscosity of the intestinal content, reduce the rate of small intestinal absorption and increase stool bulk and fecal weight. Butyrate which is one of the main end products of fermentation is believed to protect against colorectal cancer while propionate has been suggested to play a certain role in the lipid metabolism. SCFA is also known to decrease pH of the intestinal content which make the large intestine healthier.

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