An analysis of some pilot fertilizer experiments on paddy.

Abstract

Data from 25 experiments in Burma in 1954-55 are discussed. The soils contain 5-15% clay, 10-30% silt and 0.5-1.5% organic matter and pH (dry samples) ranges from 5.0 to 7.5. Yields increase only 11.7 kg per kg of N applied. Placement in rows below the aerobic mud layer would probably double N recovery at rates of 20 kg/ha N. The estimated response to P placement (5.4 kg per kg applied P) is uneconomic. With applications of 22.4 kg/ha N, but not with 44.8 kg/ha, N uptake was increased by applying P. (Abstract retrieved from CAB Abstracts by CABI’s permission)