Question

Which layer of soil determines how fertile the soil is?

Answer 1

Answer:

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Which layer of soil determines how fertile the soil is?

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TOPSOIL

The A horizon of a soil; most fertile layer of soil where humus, plant roots, and living organisms are found.

Explanation:

Answer 2

Top soil layer determines the fertility of the soil.

Explanation:

Soil is very essential for agriculture. Plants and crops are cultivated by obtaining nutrients from soil. So, fertility of soil should be in checked time to time and it should be ensured that fertility is optimum.

• A fertile soil contains all plant nutrients like potassium, nitrogen, phosphorus, calcium, magnesium, sulfur, iron, zinc, copper, boron, molybdenum, nickel.

• The pH value for soil must be in the range 6-7.

• Topsoil is the upper layer of soil, usually between 2 to 8 inches in depth. It contains most of the ground’s nutrients and fertility.

• Formation of topsoil is a very slow process, it takes 1000 of years for each inch to form as a result of weathering of rocks and decaying of organic matter.

• The topsoil layer is a mixture of sand,  silt, clay and broken down organic matter, called humus. Humus is rich, highly  decomposed organic matter mostly made  from dead plants, crunched-up leaves,  dead insects and twigs.