Farmers in northern India used to grow legumes as fodder in one season and wheat in the next season. This helped in the replenishment of the soil with ______.
Show answer & explanation
Correct answer: C
Explanation
Correct Answer:
Option 3: Nitrogen
Explanation:
*Rhizobium* bacteria are found in the roots of legumes (such as lentils), where they fix atmospheric nitrogen, making it available in the soil. When farmers grow legumes in one season and wheat in another, this practice is known as Crop Rotation. This helps maintain soil fertility and replenishes nitrogen levels. It serves as a significant example of sustainable agriculture and reduces the need for chemical fertilizers.
Additional Facts:
Option 1: Sodium is not an essential nutrient.
Option 2: Oxygen is not applicable in this context.
Option 3: Correct answer.
Option 4: This is not a function of Hydrogen.
Potential Questions for Upcoming Exams:
Question: What does *Rhizobium* do?
Answer: Nitrogen fixation
Question: What is Crop Rotation?
Answer: Growing different crops in succession
Question: What does 'N' stand for in NPK?
Answer: Nitrogen
Question: What is fertility?
Answer: Soil productivity