Concept:Green manuring is the practice of turning green, growing plants into the soil to improve soil fertility.
Explanation:Green manure crops are ploughed into the soil just before flowering because, at this stage, the plant tissues are young, soft, and tender.
Tender plant material decomposes quickly and easily after being buried in the soil.
During decomposition, organic matter is added to the soil, and essential nutrients such as nitrogen are released.
This process enriches the soil and makes it more fertile for the next crop.
Ploughing at this stage is not primarily meant to control soil pathogens, erosion, or soil temperature.
Answer:B. enrich the soil with nutrients