Application of linear programming to find out the ingredients of compost from rice straw with the lowest cost

Abstract

The application of linear programming is to find the ingredients of compost from rice straw with the lowest cost. The analysis with linear programming found that the reasonable production plan making compost from rice straw for 1 kg for organic fertilizer group of Nonthonglang village, Nanongtum Tumbon, Chumpae district, KhonKaen Province should use the amount of 0.6245 g of rice straw, 0.0534 g. with soybean, 0.0940 g. manure and 0.2280 g. bat manure in order to receive the nutrients as follows: Nitrogen 1.73%, Phosphorus 3.656% and Potassium 1.25% under organic standards. It will pay the lowest costs of production equal to 4.63 baht per kilogram. Thus, if farmers are planning to produce in accordance with the above analysis, it will decrease the production cost with increase profits for the group and is able to produce compost under organic standards as well.