HORTICULTURE SCIENCE
GENERAL AGRICULTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The upper layer of soils that contains organic material, rocks, water, and air.
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surface layer
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topsoil
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bottom soil
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topdirt
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Explanation:
Detailed explanation-1: -This layer is rich in organic material and is known as the humus layer. This layer consists of both organic matter and other decomposed materials. The topsoil is soft and porous to hold enough air and water.
Detailed explanation-2: -Humus is the organic matter present in top layer of the soil which is created by the decomposition of the dead matter.
Detailed explanation-3: -The uppermost horizon is called the “organic” horizon or “O” horizon. It consists of detritus, leaf litter and other organic material lying on the surface of the soil. This layer is dark because of the decomposition that is occurring. The organic materials in this layer decompose into nutrients that enrich the soils.
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