Number of fields
The field number (AZ), also field value number or land points (BP), is an index in Germany that measures the quality of an arable area . It is based on the number of soils by surcharges and deductions due to factors such as climate or selected landscape features such. B. Slope inclination and forest shade are determined insofar as these deviate from the standard values (including 8 ° C mean annual temperature, 600 mm mean annual precipitation, no or very little slope). The number of arable land can be seen as a correction of the number of soils while evaluating the natural conditions of the individual site.
The scale of possible values ranges from 1 (very bad) to 120 (very good). One set of maps showing the arable value is the DGK 5 Bo , which was drawn up in the course of the Reich soil assessment in 1934.
- Ulrich Ratzke, Hans-Joachim Mohr: Soils in Mecklenburg-Western Pomerania, outline of their origin, distribution and use. 2nd Edition. Contributions to soil protection in Mecklenburg-Western Pomerania. State Office for the Environment, Nature Conservation and Geology Mecklenburg-Western Pomerania, Güstrow 2005 ( PDF 4.8 MB), p. 28.
- Hans-Peter Blume et al .: Scheffer / Schachtschabel. Textbook of soil science. 16th edition, Spektrum Akademischer Verlag, Heidelberg / Berlin 2010, ISBN 978-3-8274-1444-1 , p. 526 f.