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Efficiency of Mussoorie rock phosphate as a source of fertilizer phosphorus to guar (Cyamopsis tetragonaloba) and groundnut (Arachis hypogaea)

Published online by Cambridge University Press:  27 March 2009

H. S. Hundal  and
G. S. Sekhon
H. S. Hundal
Affiliation:
Department ofSoils Punjab Agricultural University, Ludhiana (India)
G. S. Sekhon
Affiliation:
Department ofSoils Punjab Agricultural University, Ludhiana (India)
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Summary

In two field experiments, Mussoorie rock phosphate with or without pyrite, farmyard manure or straw was compared with concentrated superphosphate when applied to guar and groundnut. The treatments included rates of 10, 20 and 30 kg P/ha and were located on a soil low in available phosphorus.

Mussoorie rock phosphate was 44–52% as efficient as concentrated superphosphate. The incorporation of Amjhore pyrite, farmyard manure or straw in the soil with rock phosphate increased the effectiveness of Mussoorie rock phosphate.

Extractability coefficient ratios obtained upon laboratory incubation of soil with concentrated superphosphate and rock phosphate correlated fairly well with the availability coefficient ratios obtained from measurements with plants in the field experiments.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 87 , Issue 3 , December 1976 , pp. 665 - 669
Copyright
Copyright © Cambridge University Press 1976

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