Abstract

Field experiment conducted at Coimbatore with maize in a typic ustropept soil revealed that application of phosphatic fertilizers irrespective of source, level and effects increased the available P. Among the sources, DAP and SSP were superior over RP and its combinations. The various sources and levels and the effects did not produce any significance in the P content of grain and stalk of maize. Significant difference among the sources for P uptake in grain was observed under cumulative effect whereas it was the direct effect for stalk uptake. The DAP and SSP proved significantly superior over RP and its combinations in the grain yield under direct and cumulative effects. However, the same trend was observed for residual and direct effects in the stalk yield.

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