Which of the following adds/add nitrogen to the soil? 1. Excretion of urea by animals 2. Burning of coal by man 3. Death of vegetation Select the correct answer using the codes given below :

Which of the following statements with reference to saline soil in India is/are correct? 1. They are rich in nitrogen. 2. They occur in arid and semi-arid regions, and in waterlogged and swampy areas…

Which of the following statements is correct about laterite soil? (1) This soil is developed in areas with high temperature and heavy rainfall. (2) It is poor in iron oxide and aluminium. Select the…

Which of the following statements with reference to Humus is/are correct ? 1. It is a dark coloured amorphous substance. 2. Being colloidal in nature, it serves as a reservoir of nutrients. Select th…

Which of the following statements regarding Regur soil is/are correct ? 1. It is a light coloured, clayey and fertile soil. 2. It is developed on Deccan basaltic lava under hot and humid conditions.…

Which of the following statements about the Black Soils of India is/are correct? 1. Black Soils cover most of the Deccan Plateau. 2. Also known as 'Regur', they are generally clayey, deep and imperme…