Effect of P-Fertilizer and Organic Matter to Value of pH and pHo, P-avaibility, and Yeild of Mieze in Andisols from Pangalengan West Java

Abstract

One of the problems in the utilization of Andisols for agriculture is their high retention of phosphate by allophane mineral which has variable charge. Such phenomenon can be reduced by giving high phosphate fertilizer or increasing organic matters. This research aimed to understand the effect of dose of P fertilizer and types and dose of organic matter fertilizers to reduce P-Retention and soil pH0 on Andisols planted with sweet corn, so the efficiency of phosphate fertilizer utilization could be achieved. This research was conducted in glasshouse experiments using Completely Randomized Design respectively. The result showed there were no interaction effects between phosphate and organic matters on P retention, P total, P availability, P uptake, pH and pH0. Optimal dose of phosphate fertilizers for sweet corn was 45 kg/ha P2O5 for all organic matter fertilizers.