Maize fertilizer investigations on the Atherton Tableland, Queensland

Abstract

Responses ranging from 10 to 47 bus/ac were recorded to nitrogen fertilizer application in three of six experiments conducted from 1960 to 1963 on red loam soils. Lack of nitrogen response in the remaining experiments was associated with either high fertility, incidence of tropical rust, or abnormally dry conditions. Residual effects of nitrogen were small. Responses to superphosphate varied from nil to 19 bus/ac, and residual responses were evident for up to two years on soils containing less than 70 p.p.m. available P2 05. Potash applications were of little significance.