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Comparative response of groundnut and wheat to phosphorus in a groundnut–wheat rotation

Published online by Cambridge University Press:  27 March 2009

N. S. Pasricha
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, India
M. S. Aulakh
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, India
N. S. Sahota
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, India
H. S. Baddesha
Affiliation:
Department of Soils, Punjab Agricultural University, Ludhiana, India

Summary

Pod yield of groundnut and grain yield of wheat grown in that sequence was compared as affected by date of sowing and response to direct, residual and cumulative P application over 3 years in a field experiment. Total yield of groundnut and wheat was higher when groundnut was sown on 22 June and the following wheat on 1 November than when groundnut was sown on 6 July, followed by wheat sown on 16 November. Limited P requirement of groundnut was indicated by the small and inconsistent response to applied P on soil low in available P. Wheat responded to the second increment of P and direct application to wheat proved more effective than residual effects of previous application. Differential response of wheat to direct and residual P application in the groundnut-wheat cropping sequence indicates that P applications are more effective for wheat than groundnut, and groundnut can grow well on the residual P that remained in the soil.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1980

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