FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Subsoil
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Substratum
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Topsoil
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All of the above
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Detailed explanation-1: -Soil fertility decline occurs when the quantities of nutrients removed from the soil in harvested products exceed the quantities of nutrients being applied. In this situation, the nutrient requirements of the crop are met from soil reserves until these reserves cannot meet crop demands.
Detailed explanation-2: -The Laterite soils are not fertile and are not suitable for agriculture. They are coarse in texture and poor in nitrogen, phosphoric acid, potash, and urea.
Detailed explanation-3: -Soil fertility is the ability of a soil to sustain plant growth by providing essential plant nutrients and favorable chemical, physical, and biological characteristics as a habitat for plant growth. Plant nutrients include the macronutrients nitrogen, phosphorus and potassium, sulfur, calcium and magnesium.