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field capacity

The vital for plants water seeps away rainfall (Rain, hail, sleet, snow) in the ground. A small proportion is also derived from the condensation formed by condensation (dew, frost), which is directly through the just below the surface Tauwurzeln is recorded. The non-solid soil substance consists of different sized pores, which are filled with air and / or water. The pores can make up 30 to 60% of the total volume. Depending on the pore volume, the porosity results - the ratio of the cavity volume to the total volume. In dry soil all pores are filled with air.

Water Storage Fortune - graphic with soil structure and terms

The infiltrating water displaces the air first in the fine pores, until finally, when the soil is moist, only air remains in the coarse pores. Adhesive or capillary water is the water held against gravity, which remains in pores less than 10 μm due to the surface tension of the water (meniscus = concavely curved water surface). The amount of hold water that the soil with its pores can hold against gravity is called water capacity (WK) or field capacity (FK). She is...

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