Summary:
Developing accurate variable-rate technology (VRT) fertilizer application maps is critical in implementing precision farming management. Intensive grid soil sampling has traditionally been used to develop application maps. Research at the University of Nebraska found that in many cases where the spatial distribution is rather complex, much finer grid densities than those currently used commercially are required to produce accurate maps of nutrient levels for fertilizer applications (Gotway et al., 1996). However, the cost and labor intensity associated with intensive grid sampling suggests other approaches may be more feasible. Management zone technology may provide a more economical method of developing VRT application maps.
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