Which soil particles are present in loamy soils?

In which one of the following areas in India , the problem of soil erosion is critical?

Which one of the following crop enriches the Nitrogen content in soil?

Karewas soils, which are useful for the cultivation of Zafran (a local variety of saffron), are found in:

Which one of the following is found in appreciable amount in Laterite soil in India?

The largest geographical area of India is covered by which one of the following types of soils?