Compost, vermicompost, and green manure are all organic soil amendments commonly used in India to improve soil fertility and structure.

Gypsum is primarily used to reduce soil acidity and improve soil structure by replacing sodium ions with calcium ions.

Organic matter, such as compost or manure, helps to improve the water-holding capacity of sandy soils by increasing the soil's ability to absorb and retain water.

Elemental sulfur is primarily used to reduce soil pH, making it more acidic. This is beneficial for certain crops that prefer acidic soils.

Rock phosphate, urea, and potassium chloride are all inorganic soil amendments commonly used in India to provide essential nutrients to crops.

Lime is primarily used to increase the pH of acidic soils, making them more alkaline. This is beneficial for certain crops that prefer alkaline soils.

Perlite, vermiculite, and sand are all commonly used to improve soil aeration and drainage by increasing the pore space in the soil.

Nitrogen-fixing bacteria are primarily used to provide essential nitrogen nutrients to plants by converting atmospheric nitrogen into a form that plants can absorb.

Mulch, cover crops, and contour plowing are all commonly used to control soil erosion and improve soil structure by protecting the soil from wind and water erosion.

Organic matter provides essential nutrients to plants, enhances soil structure, and increases soil water-holding capacity, leading to improved soil fertility.

Rock phosphate, superphosphate, and triple superphosphate are all commonly used to provide essential phosphorus to plants.

Potassium plays a crucial role in improving crop quality, enhancing water use efficiency, and increasing resistance to pests and diseases.

Dolomite is primarily used to provide essential calcium and magnesium to plants, improving soil fertility and plant growth.

Micronutrients are essential for plant growth and development. Adding micronutrients to soil prevents nutrient deficiencies in plants, improves crop quality, and enhances soil fertility.

Gypsum is primarily used to control soil salinity and improve soil structure by replacing sodium ions with calcium ions.