Why are some pulses called leguminous crop? Why are they grown in rotation with other crops?
Answers
Legumes are plants that have nodules that contain rhizobia bacteria. These bacteria have the ability to fix/ incorporate free atmospheric nitrogen into the soil. This they do by converting the nitrogen in the atmosphere into nitrates and nitrites that can be used up as plant nutrients. The legumes are thus very important plants in the field in providing nitrogen nutrient in the soil.
The cereals on the other hand do not have this ability of fixing nitrogen into the soil. Therefore, what happens is that the cereals use up whatever nitrogen they find in the soil while they are grown. This therefore leads to a depletion of the existing nitrogen nutrient in the soil.
For this reason, farmers plant legumes in the same field where cereals were planted that the legumes may replenish the nitrogen nutrient that has been used up by the cereals.
Answer:
leguminous are the plants which converts nitrogen of the atmosphere into nitrates and nitrites. some pulses are known as leguminous crop because they have this ability.
Explanation:
they are grown in rotation with other crop to fulfill the need of nutrients in the soil of nitrogen from the atmosphere . And for this reason farmers grow these crops in rotation with other crops.
hope it helps.