FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Weaker the soil’s capacity to hold onto water and nutrients
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Stronger the soil’s capacity to hold onto water and nutrients
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Greater the risk of nutrient leaching
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Greater the porespace
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Detailed explanation-1: -Because a higher CEC usually indicates more clay and organic matter is present in the soil, high CEC soils generally have greater water holding capacity than low CEC soils.
Detailed explanation-2: -Soils with a high CEC have a much lower percentage of cations in the soil water, so are far less susceptible to nutrient loss by leaching.
Detailed explanation-3: -Soils with high CEC have high ability to hold water (e.g clay soils) while soils with low CEC have low ability to hold water (e.g sandy soils).
Detailed explanation-4: -CEC is defined by measurement of the amount of positively-charged ions (cations) which can be bound by a given weight of soil. Cations bound on the soil surface can exchange places with cations in the soil solution, making them available to the plants and subjecting them to leaching.