passwella.
Menu

GCE Agricultural Science 1989 Question 15

Question 15

Soil Fertility and Plant Nutrition

Rhizobium supplies nitrogen to leguminous plants by

  1. A.changing some mineral salts to sulphate of ammonia
  2. B.incorporating urea into its body
  3. C.fixing atmospheric nitrogen
  4. D.decomposing plant remains
  5. E.Increasing the pH value of the soil.
Show the answer and explanation

Answer: C (fixing atmospheric nitrogen)

Explanation

Rhizobium in root nodules fixes nitrogen gas from the air into compounds the legume can use.