Soil Fertility Status, Nutrient Uptake, and Maize (Zea mays L.) Yield Following Organic Matters and P Fertilizer Application on Andisol

Objective of this study were to elucidate effects of organic matters and P fertilizer application on soil fertility status, nutrient uptake and maize yield in the Andisol. This experiment consisted of two factors. The first factor comprised of four levels of organic matters input (without organic matter, manure, rice straw, and Gliricidia sepium leaves), with the application dosage 10 t.ha^-1 and the second factor comprised of three levels of P fertilizer application (without P addition (control), 50 kg P₂O₅ ha^-1, 100 kg P₂O₅ ha^-1). Results of this study showed that organic matters and P fertilizer application improved soil fertility status, especially pH, soil organic C, cation exchange capacity (CEC), available P which resulted in an increase in P uptake that improve yield of maize. The highest yield of maize (corn cob) was obtained through application Gliricida sepium (8.40 t.ha^-1), followed by manure (6.02 t.ha^-1) and rice straw (5.87 t.ha^-1). Application of 50 kg P₂O₅ Ha^-1 yield was (5.76 t.ha^-1) and application of 100 Kg P₂O₅ Ha^-1 yield was (6.12 t.ha^-1).