Comparison of the Yield Response of Groundnuts to Single and Triple Superphosphate in Uganda

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Date
1972
Authors
Foster, H. L.
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Abstract
Since 1963 more than a thousand fertilizer trials on small private farms in Uganda have been carried out to test the effect of single super phosphate on groundnuts. Many significant yield responses have been recorded [I, 2] and recommendations for the application of single super phosphate to ground nuts have been made for specific areas in Uganda [3]. It was generally assumed that the yield response was almost entirely due to the phosphate content of the fertilizer. However, analysis of soils from responsive trials in Ankole district revealed that some contained a high level of extractable phosphate, suggesting that yield response in these trials may in fact have been due to the calcium or sulphur content of the fertilizer.
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East African Agricultural And Forestry Journal, 38, p. 103-113
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