Question

A scientist tests a soil sample from an uncultivated field and concludes that the soil is highly basic in nature. She suggests that adding organic matter in the soil could improve the quality of the soil. How does organic matter improve the quality of the soil?

Answer 1

Answer:

▪︎Organic matter includes any plant or animal material that returns to the soil and goes through the decomposition process. In addition to providing nutrients and habitat to organisms living in the soil, organic matter also binds soil particles into aggregates and improves the water holding capacity of soil.

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Answer 2

As organic matter decreases the pH of the soil, this will help to improve the quality of soil.

• Organic matter consists of the residues of living organisms such as plants and animals. Leaves, algae, leather and wood are some examples of organic matter.
• When organic matter decays, it produces hydrogen ions. These hydrogen ions on coming in contact with moisture or water turn into carbonic acid.
• Carbonic acid is a weak acid. Hence, it will help in improving the fertility of the soil by maintaining its pH.