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Changes in Yields and Fertilizer Responses with Continuous Cropping in Uganda

Published online by Cambridge University Press:  03 October 2008

D. Stephens
D. Stephens
Affiliation:
Department of Agricultural Chemistry, Makerere University College, Kampala, Uganda
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Summary

In sixteen factorial field trials with N, P, K, Mg, trace element and farmyard manure treatments, yields declined during the first four years of cropping following a resting period under grass, responses to K and farmyard manure increased, and other treatments showed no significant changes. After a few years of continuous cropping potassium deficiency may seriously limit yields, especially of sweet potatoes. N, P and K fertilizers maintained yields as well as the farmyard manure treatment.

Type
Research Article
Information
Experimental Agriculture , Volume 5 , Issue 4 , October 1969 , pp. 263 - 269
Copyright
Copyright © Cambridge University Press 1969

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References

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