The following crops will enrich the soil with nitrates except

Assessment: WAEC SSCE - Agricultural Science - 2011 (Objective) Subject: Agricultural Science

Question 1 Report

The following crops will enrich the soil with nitrates except
Answer Details
The correct answer is Exoriepus. This is because calopogonium, pueraria, and centrosema are all leguminous crops that can fix atmospheric nitrogen in their root nodules with the help of symbiotic bacteria. The nitrogen fixed by the bacteria is converted to nitrates in the soil, thus enriching the soil with nitrates. However, Exoriepus is not a leguminous crop and does not have the ability to fix atmospheric nitrogen. Therefore, it cannot enrich the soil with nitrates.

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