Decline in Fertility Status of a Tropical Forest Ochrosol Under Continuous Cropping
- 1 January 1973
- journal article
- research article
- Published by Cambridge University Press (CUP) in Experimental Agriculture
- Vol. 9 (1) , 15-22
- https://doi.org/10.1017/s0014479700023620
Abstract
SUMMARY: Crop yield on continuously cultivated tropical forest soil was maintained at a fairly high level by the application of mineral fertilizer. Although the low rate of nitrogen applied as ammonium sulphate did not increase yield, there was a significant effect on pH of the soil resulting in a reduction of the divalent cations on the exchange complex. The effect of mulch was mainly chemical through the release of nutrients.Keywords
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