Abstract:
Nitrogen management plays a key role in cotton production. It is the nutrient required in greatest quantity by the crop and it is the nutrient most often deficient. Despite a large investment in fertilizer N in cotton cropping systems, the efficiency with which it is used by the crop can often be very low. This efficiency can vary greatly from season to season, between different forms of management and between cotton cropping systems. Much of this variation can be attributed to variations in the amount of N lost from the cotton cropping system.
