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Which of the following horizons of soil support
plant growth?
Horizon A
Horizon B
Horizon C
Horizon R

Asked by Sunil 20th June 2016, 10:11 AM
Answered by Expert

Horizon A of the soil supports plant growth because it is rich in organic matter. This layer is penetrated by roots of plants. Soil organisms such as earthworms,  arthropods, nematodes, fungi, and many species of bacteria are concentrated in this region, often in close association with the roots of plants.

Once soil has developed, it is composed of horizontal layers with differing physical or chemical characteristics and varying thickness and color. These layers are called horizons. Each layer represent a distinct soil that has built up over a long time period. The layers together form the soil profile.

Answered by Expert 20th June 2016, 11:52 AM
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