INSPIRE
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available water capacity

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available water capacity
Definition:
Amount of water that a soil can store that is usable by plants, based on the potential root depth.
Description:
the amount of water that a soil can store that is available for use by plants. It is the water held between field capacity and the wilting point adjusted downward for rock fragments and for salts in solution. DEFINITION Field capacity: maximum water content expressed in percent (mass fraction or volume fraction), that an unsaturated soil can retain against gravity under undisturbed soil conditions (conventionally stated as the water content 2 to 3 days after full saturation with water). DEFINITION Wilting point: water content of the soil below which the plants are not able to uptake water with their root system. SOURCE ISO 11074 NOTE The water available capacity is a parameter to be taken into account for meeting the (i) Directive 2009/28/EC of the European Parliament and of the Council (energy from renewable resources)
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