What role do soil microorganisms play in agriculture?

• A. Decompose organic matter
• B. Fix nitrogen in plants
• C. Both a and b
• D. None of the above

Answer: (C)

Soil microorganisms play a crucial role in agriculture by engaging in processes that significantly benefit plant growth and soil health. One of their primary functions is the decomposition of organic matter. This process breaks down complex organic materials like plant residues and animal remains into simpler forms, releasing essential nutrients back into the soil. These nutrients are vital for plant uptake, fostering healthy crop development.

Additionally, certain soil microorganisms, particularly specific bacteria, have the ability to fix atmospheric nitrogen, converting it into a form that plants can absorb and utilize. Nitrogen is a critical nutrient for plants, as it is a key component of amino acids and nucleic acids, making it necessary for overall growth and development.

By performing both decomposition and nitrogen fixation, soil microorganisms significantly enhance soil fertility and promote sustainable agricultural practices, making them integral to productive farming systems. Thus, the selected answer accurately encapsulates the vital roles played by soil microorganisms in agriculture.