Soil & Fertility

Which of the following are nitrogen-fixing plants? 1. Alfalfa 2. Amaranth 3. Chickpea 4. Clover 5. Purslane (Kulfa) 6. Spinach Select the correct answer using the code given below:

What is the use biochar in farming? 1. Biochar can be used as a part of the growing medium in vertical farming 2. When Biochar is a part of the growing medium, it promotes the growth of nitrogen-fixing microorganisms. 3. When biochar is a part of the growing medium it enables the growing medium to retain water for longer time. Which of the statement given above is/are correct?

Consider the following statements : . The nation-wide ‘Soil Health Card Scheme’ aims at 1. expanding the cultivable area under irrigation. 2. enabling the banks to assess the quantum of loans to be granted to farmers on the basis of soil quality. 3. checking the overuse of fertilizers in farmlands. Which of the above statements is/are correct?

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.