GK
ECOLOGY BIODIVERSITY CONSERVATION ENVIRONMENTAL ISSUES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Wilting coefficient of a loam represents
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The minimum water content of the soil at which plants can no longer obtain water
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Water holding capacity
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Field capacity
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Capillary water
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Explanation:
Detailed explanation-1: -The soil is considered to be at permanent wilting point when the water potential in the soil is at or below-1.5 MPa, so the permanent wilting point is the water content of the soil at-1.5 MPa water potential.
Detailed explanation-2: -The volumetric soil moisture content remaining at field capacity is about 15 to 25% for sandy soils, 35 to 45% for loam soils, and 45 to 55% for clay soils.
Detailed explanation-3: -The permanent wilting point is the water content at which plants start to wilt during daytime – indicating that they are no longer able to extract water from the soil. The suction at this point is very high, about 1470 kPa.
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