Fertilizer Recommendations for Cereals Crown on Soils Derived from Volcanic Rocks in Uganda

Abstract

Eighty-five fertilizer trials on whe.1t and 132 fertilizer trials on maize were carried out. Over a period of several years on small private farms situated on soils derived from the volcanic rocks of Mount Elgon in Eastern Uganda. Although soil test figures were exceptionally high, large and profitable responses to fertilizer were obtained with both crops. This unexpected result can be accounted for by either the special nature of these soils or the fact of their intense almost ;continuous cultivation, and emphasizes that the interpretation of soil analysis results depends considerably on soil type and history.