Introduction to Nutrient Cycling

Q. What are the different types of nutrient cycles found in nature ?

1. Gaseous
2. Sedimentary
3. Water
4. Oxygen cycle

Q.

If by radiation all nitrogenase enzymes are inactivated, then there will be no

1. fixation of atmospheric nitrogen

2. conversion from nitrate to nitrite in legumes

3. conversion from ammonium to nitrate in soil

4. fixation of nitrogen in legumes