Studies on the utilization of organic waste materials for soil improvement: 1. Efficiency of filter cake as phosphorus fertilizer for upland crop grown in an acid sulfate soil
1988
Jongruk Chanchareonsook | Supamard Panichsakpatana | Pattama Sangborisut (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Soils)
Studies on the efficiency of filter cake, the waste material from sugar mill factory, as phosphorus fertilizer for upland crop grown in an acid sulfate soil (Rangsit soil) were carried out in pot experiment either with urea on (NH4)2SO4 as source of nitrogen. Filter cake, triple superphosphate and rock phosphate were applied in the rate of 0.57 g P/2 kg soil/pot. Corn was used as indicator crop; it was harvested at tasseling stage. Filter cake significantly increased growth, yield (dry matter) and total phosphorus uptake of corn grown in acid sulfate soil. With urea as source of nitrogen, the effectiveness of filter cake in increasing yield (dry matter) and total phosphorus uptake of corn was relatively the some as those of triple superphosphate and rock phosphate. With (NH4)2SO4 as source of nitrogen, the effectiveness of filter cake in increasing yield (dry matter) and total phosphorus uptake of corn was higher than those of triple superphosphate and rock phosphate. Filter cake could be effectively used as phosphate source for upland crops in acid sulfate soil.
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