Question

Crop rotation is an agricultural technique whereby farmers cultivate pulse crop like green gram, Bengal gram or black gram in one season and in next, they grow a cereal crop. Though they do not apply nitrogenous fertilizers , yet the crop production is good. Explain the reasons. If the answer is correct then I will mark you as a brainliest but if the answer is not applicable or cheat from Google the I will report it.

Answer 1

Answer:This is because of the following reason

• if same crop is sown for years together the crop consumes same kind of minerals from the soil..later the soil will be deficient of that particular minerals. for example : rice needs potassium , phosphorous and , nitrogen to grow.so it absorbs those minerals from the soil. if the farmer  continuously  sow the rice crop then minerals like potassium , nitrogen  , phosphorus  are completely absorbed by the crop and the soil becomes infertile.

Answer 2

Answer:

• If a same particular crop is sown all the time some particular nutrients used by the crop will be absorbed and hence the soil becomes deficient of that particular nutrient .
• Secondly, the crops like Bengal gram, Green gram and Ground nut are Leguminous which means their roots contain nitrogen fixing bacteria ( called as Rhizobhium ), which renew atmospheric nitrogen into the ground directly .

Explanation:

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