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Effect of different green manures on responses of potatoes to K and its availability in the soil

Published online by Cambridge University Press:  27 March 2009

R. C. Sharma ,
P. M. Govindakrishnan  and
R. P. Singh
R. C. Sharma
Affiliation:
Central Potato Research Institute, Shimla, 171 001, India
P. M. Govindakrishnan
Affiliation:
Central Potato Research Institute, Shimla, 171 001, India
R. P. Singh
Affiliation:
Central Potato Research Institute, Shimla, 171 001, India
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Summary

In a field experiment conducted from 1981 to 1984 on alluvial soil (Ustochrept) of Jalandhar, green manure (GM) of dhaincha, sannhemp, pearl millet and moong did not affect tuber yield in the 1st year but increased it in the 2nd and 3rd years. GM of dhaincha and sannhemp were more effective than the moong in reducing responses of potatoes to K. GM of pearl millet was as effective as the dhaincha or sannhemp in 1981–2 and 1982–3 when buried 55 days after sowing but was inferior in 1983–4 when buried 85 days after sowing and resulted in reduced concentrations of N and P in potato plants. GM of dhaincha, sannhemp and pearl millet increased concentration of K in potato plants and available K in soil. GM of dhaincha and sannhemp, in particular, increased soil available K by decreasing non-exchangeable K whereas GM of pearl millet increased soil available K without affecting non-exchangeable K.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 110 , Issue 3 , June 1988 , pp. 521 - 525
Copyright
Copyright © Cambridge University Press 1988

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References

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