usable field capacity in 1. metre

The usable field capacity (nFK) of a soil or horizon is the part of the field capacity available for vegetation. It thus contains the amount of water that a horizon far from groundwater can retain against gravity in natural storage at suction voltages of pF 1.8-4.2 after sufficient saturation. The calculation is initially made for each horizon. The results are added up and classified to a depth of 100 cm or the rootable soil space (dB). The method reproduces the representative NFC of the respective depth level.