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 includes the amount of water that a groundwater distant horizon in natural storage can withhold against gravity at suction voltages of pF 1,8-4.2 after sufficient saturation. The calculation is first for each horizon. The results are added and classified to 100 cm depth or the rootable soil space (dB). The method represents the representative nFK of the respective depth level.