Soil organic matter is derived from various sources in Indian agriculture, including crop residues, animal manure, green manure, and other organic materials added to the soil.

Black soil, also known as Regur soil, is renowned for its high organic matter content and is widely found in the Deccan Plateau region of India.

Soil organic matter plays a crucial role in improving soil structure, enhancing water retention, providing nutrients for plants, and supporting beneficial soil organisms.

Crop rotation, residue management, and green manuring are effective practices employed in Indian agriculture to enhance soil organic matter content and improve soil health.

Soil organic matter contributes to crop productivity by enhancing nutrient availability, promoting root development, improving soil moisture retention, and supporting beneficial soil organisms.

Humus, a stable form of soil organic matter, contains nitrogen-fixing bacteria that play a vital role in nitrogen fixation in legumes.

Soil organic matter plays a crucial role in sustainable farming practices by reducing the need for chemical fertilizers, improving soil resilience to climate change, enhancing biodiversity, and promoting overall soil health.

No-till farming, contour farming, and terracing are effective soil management practices that help minimize soil erosion and conserve soil organic matter.

The effect of soil organic matter on soil pH depends on the type of organic matter. Some organic materials, like crop residues, can increase soil pH, while others, like sawdust, can decrease soil pH.

Lignin is a complex organic compound that is resistant to decomposition and contributes to the formation of stable soil organic matter.

Soil organic matter plays a significant role in carbon sequestration by storing carbon in the soil, reducing greenhouse gas emissions, and improving soil fertility.

Melanin, a dark-colored pigment, is responsible for the characteristic dark color of black soil.

The effect of soil organic matter on soil temperature depends on the type of organic matter. Some organic materials, like straw, can increase soil temperature, while others, like peat moss, can decrease soil temperature.

Lignin, cellulose, and hemicellulose are major sources of energy for soil microorganisms involved in the decomposition of organic matter.

Soil organic matter plays a crucial role in nutrient cycling by storing nutrients in the soil, releasing nutrients into the soil, and improving nutrient availability to plants.