Crop production depends heavily on having nutrients readily available for plant uptake. Management of all nutrient sources, including commercial fertilizer, compost and manure, within the constraints of farm production systems and operational goals are prerequisite for both profitable crop production and environmental sustainability.
Inappropriate management of these sources can lead to a reduced economic return and environmental degradation of both, surface and ground water. It is imperative that nutrient management planning activities are recognized and carried out.
• Soil fertility reflects the physical, chemical and biological state of soil.
• Soil fertility can be defined in relation to the plants that grow naturally or are introduced into soil.
• Knowledge of the origin of soil helps to predict the level of soil fertility prior to land management.
• Soil disturbance alters the physical, chemical and biological components of soil fertility either directly or indirectly.
• Assessing the biological fertility of soil is not simple and this book provides an overview of why this is so.
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