The correct answer is: B) Iron oxides.
Black soils are rich in iron oxides, which give them their characteristic dark color. Iron oxides are also responsible for the soil’s ability to retain moisture and nutrients. Black soils are well-suited for growing a variety of crops, including rice, cotton, and sorghum.
Calcium carbonate is a mineral that is found in many types of soil. It is a white, powdery substance that can be used to neutralize acidity in soil. Calcium carbonate is also a source of calcium for plants.
Nitrogen is an essential nutrient for plants. It is used in the production of proteins and other organic compounds. Nitrogen is found in the soil in organic matter, such as manure and compost. It can also be added to the soil in the form of fertilizer.
Potash is a mineral that is found in many types of soil. It is a source of potassium for plants. Potassium is essential for plant growth and development. It helps plants to regulate water uptake and to produce strong stems and leaves.
In conclusion, black soils in Telangana are rich in iron oxides. Iron oxides give the soil its characteristic dark color and help it to retain moisture and nutrients. Black soils are well-suited for growing a variety of crops.