Response of Rice Yields to Phosphorus Fertilizer Rates and Polymer Coating

Abstract

A polymer coating of phosphate fertilizer was evaluated for rice yield response. Three rates of phosphate fertilizer, including polymer coated and non coated, were compared to an untreated check. Net returns were calculated based on crop price and input costs. At the 25‐lb‐acre P 2 O 5 rate the polymer coated treatments produced greater yields than equivalent non coated treatments. At higher P 2 O 5 rates both polymer coated and non coated treatments produced equivalent yields. The 25‐lb P 2 O 5 coated TSP treatment produced the greatest returns to producers.