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2. Understanding Soil and Plant Nutrition;Agbede,2009
3. Organic matter and soil fertility management in the humid tropics of Africa;Agboola,1990
4. Growth, Nutrient Uptake and Yield of Maize and Okra as Influenced by Compost and Nitrogen Fertilizer under Different Cropping Systems;Akanbi,2002
5. Evaluation of the fertility status of selected soils for crop production in five ecological zones of Nigeria;Akinrinde,2000