Question

In crop rotation practices, cereal crops are rotated with legumes.
How does this help the farmer? Give any two valid points.

Answer 1

Crop rotation is the practice of growing a series of different types of crops in the same area across a sequence of growing seasons. It reduces reliance on one set of nutrients, pest and weed pressure, and the probability of developing resistant pest and weeds.

Growing the same crop in the same place for many years in a row, known as monocropping, gradually depletes the soil of certain nutrients and selects for a highly competitive pest and weed community. Without balancing nutrient use and diversifying pest and weed communities, the productivity of monocultures is highly dependent on external inputs. Conversely, a well-designed crop rotation can reduce the need for synthetic fertilizers and herbicides by better using ecosystem services from a diverse set of crops. Additionally, crop rotations can improve soil structure and organic matter, which reduces erosion and increases farm system resilience.

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Answer 2

Answer:

The reasons why leguminous plants are planted after cereal crops in crop rotation are as follows-

1.Leguminous plants help in nitrogen fixation with the help of rhizobium bacteria present in their root nodules.

2. It increases the soil fertility as nitrogen is an important element required for plant growth.

Explanation:

Continuous growing of cereal crops reduces the strength and fertility of the soil, making it less effective in cultivation of next crop.

Alternative growing of cereal crops and leguminous plants, helps to maintain the soil fertility.