Abstract
Abstract To evaluate soil fertility and to calculate fertilizer recommendations for different soil types and crop rotations, two expert systems were developed and are being used in Belgium and the Northern part of France. The BEMEX expert system (BEMEX, coming from BEMEstingsEXpertsysteem, Dutch for fertilization expert system) calculates field specific fertilizer recommendations for macronutrients and liming recommendations for crop rotations with arable crops and vegetable crops and for grasslands. The N‐INDEX method is a field specific advice‐system for N‐fertilizer recommendation for most arable and vegetable crops. The knowledge base of BEMEX as well as of N‐INDEX contains empirical and theoretical knowledge. The required information to run the expert systems consists of measurements of the chemical soil fertility on soil samples on the one hand and of information concerning the parcel and the crop on the other hand. The final output of the expert system is a two‐to‐five page bulletin, with the resul...
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