Yield measurement of the soil estimate — arable or grassland number according to soil area data Hessen 1:5000 for agricultural land (BFD5L) — The natural yield conditions are classified in the soil estimate by the level of soil number in the class sign in a range of 7 to 100.Based on the number of soils, the yield capacity of a soil is determined taking into account the effects of climate and relief (management difficulties, etc.) through increases and reductions in soil numbers and reported as a crop, grassland number or yield measure.