Abstract
Despite various fertilizer recommendations, maize (Zea mays L.) yields in tropical forest and savanna zones are very low. These low yields could be attributed in part to the exclusion of some secondary and all micro nutrients in fertilizer recommendations for maize, a condition which often leads to nutrient imbalance. The inclusion of some secondary and micro nutrients in fertilizer recommendation for successful maize cultivation in this zone has been suggested [2, 16] but no one has proposed a balanced nutrient program for this purpose. Field trials were therefore conducted to investigate the potential for improving maize yields by fertilizing soils of different parent materials with both macro and micro nutrients in three ecological zones of maize production in south western Nigeria.
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