The grassland number (GZ) (1 to 100) is a measure of the productivity of grassland in soil estimation . The GZ is determined based on the grassland assessment framework of the Reich soil assessment or the improved Rostock grassland assessment framework. The basis for determining the GZ is the basic grassland number, which indicates the percentage yield ratio of a certain grassland area to the best soil.
The basis for determining the GZ are the soil points as well as five soil types , three soil levels, three climate levels and nine water levels, with increasing wetness being characterized by + and increasing dryness by - . Furthermore, corresponding deductions for inclination or relief , loss of area through ditches and paths, etc. a. considered. If there are no factors reducing the yield, the GZ corresponds to the basic grassland number.
The productivity is based on an estimate of the yield in dt / ha with normal cultivation, converted to a good quality. Methodologically, the GZ is determined like the number of fields .
- Federal Law Gazette, issues 55–70 (2007), p. 3177
- Law for the estimation of agricultural cultivated soil (Bodenschätzungsgesetz - BodSchätzG) at gesetze-im-internet.de