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Definition of Wilting point

Wilting point Definition from Science & Technology Dictionaries & Glossaries
Soil Glossary - Mani
The percentage by weight of water remaining in the soil when the plant wilts permanently.
Agricultural Glossary/yigini2004
The percentage by weight of water remaining in the soil when the plant wilts permanently.
—Point at which the rate of moisture loss from the leaf surface is greater than the uptake from plant roots. The wilting point differs in various soil types according to texture.
Wilting point Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
Permanent wilting point (PWP) or wilting point (WP) is defined as the minimal point of soil moisture the plant requires not to wilt. If moisture decreases to this or any lower point a plant wilts and can no longer recover its turgidity when placed in a saturated atmosphere for 12 hours. The physical definition of the wilting point (symbolically expressed as θpwp or θwp) is defined as the water content at −1500 J/kg of suction pressure, or negative hydraulic head.

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Wilting point Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
The minimum quantity of water in a given soil necessary to maintain plant growth. When the quantity of moisture falls below this point, the leaves begin to droop and shrivel up. In any given soil the minimum quantity is practically constant for all plants, but it increases with a decrease in the size of soil particles.