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Sorghum-Legume Intercropping and the Effects of Nitrogen Fertilization. I. Yield and Nitrogen Uptake by Crops

Published online by Cambridge University Press:  03 October 2008

A. B. Waghmaref  and
S. P. Singh
A. B. Waghmaref
Affiliation:
Division of Agronomy, Indian Agricultural Research Institute, New Delhi 110 012, India
S. P. Singh
Affiliation:
Division of Agronomy, Indian Agricultural Research Institute, New Delhi 110 012, India
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Summary

Six intercropping systems and four levels of nitrogen were compared at the Indian Agricultural Research Institute, New Delhi, in the summer rainy seasons (July-October) of 1978 and 1979. The maximum increase in sorghum yield was obtained when it was associated with fodder cowpea, followed by association with grain cowpea and greengram. The application of 40, 80 and 120 kg N ha−1 increased sorghum yield by 8.6, 16.1 and 18.2% in 1978 and by 2.9, 8.1 and 14.1% in 1979, respectively, compared with unfertilized sorghum. The nitrogen uptake by sorghum, and by the total system, was greater in sorghum-legume intercropping systems than in sole sorghum. Nitrogen application also increased the nitrogen uptake by sorghum and by the whole system.

Type
Research Article
Information
Experimental Agriculture , Volume 20 , Issue 3 , July 1984 , pp. 251 - 259
Copyright
Copyright © Cambridge University Press 1984

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References

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