Open AccessA Decision Support System for Rice Cultivation on Acid Sulfate Soils in Malaysia
Author(s) -
Totok Suswanto,
J. Shamshuddin,
S.R. Syed Omar,
C.B.S. The,
Peli Mat
Publication year - 2005
Publication title -
jurnal ilmu tanah dan lingkungan
Language(s) - English
Resource type - Journals
eISSN - 2549-2853
pISSN - 1410-7333
DOI - 10.29244/jitl.7.1.1-5
Subject(s) - lime , sulfate , fertilizer , profit (economics) , mathematics , soil water , agricultural engineering , soil ph , agronomy , environmental science , environmental engineering , chemistry , soil science , engineering , economics , biology , paleontology , organic chemistry , microeconomics
Ameliorative steps to put acid sulfate soils into productive use can be organized by a decision support system. Themodel uses microeconomic analysis to get an optimal rate of lime and fertilizer in maximizing profit. A glasshouse experiment was conducted on an acid sulfate soil in Malaysia to get the potential yield. A field trial was conducted for validationpurposes. The recommended rate offertilizer application of 150-200 kg ha-J N. 20-30 kg ha-J P and 150-200 kg ha-J K were applied during the critical stage of the rice growth. Field Adjusting Factor (FAF) ofOAQ has been found and this was used /0 analyze the production function. Using TableCurve 3D software. an equation for production function was established.Validation using experimental data showed that the equation has a good capability. shown by the value of p>0.2 (t-test) andMEE of 2%. The model. named as RiCASS(Rice Cultivation on Acid Sulfate Soil}. was developed and successfully simulatedthe maximal profit under 4 different scenarios. The recommended rate of lime (GML) was 6.5 t ha-J for maximal profit and 2.5- 3.0 t ha-J for the farmers . practice .
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