Why do farmers grow leguminous plants after a cereal crop?

The growing of different kinds of crops on a piece of land in a preplanned succession is known as crop rotation. In the rotation of crops, leguminous crops like pulses, beans, peas, groundnut and Bengal gram are sown in-between the seasons of cereal crops like wheat, maize and pearl millet. The leguminous plants are grown alternately with non-leguminous plants to restore the fertility of the soil. When the cereal crops like rice, wheat, maize are grown in the soil, it uses up a lot of nitrogenous salts from the soil. If another crop of cereal is grown in the same soil, the soil becomes nitrogen deficient. So by rotation a leguminous crop is grown. There plants have the ability to fix atmospheric nitrogen to form nitrogen compounds through the help of certain bacteria present in their root. These nitrogen compounds go into the soil and make it more fertile. After the leguminous plants utilize some of the nitrogen compounds, the rest of it is left in the soil to enrich it. Thus, planting a leguminous plant will result in nitrogen rich soil and when a cereal is grown in this soil there is increase in food grain production.
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To increase nitrogen in souil
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As spring seeding time approaches, it's a good time to think about crop rotation and consider replacing some fallow ground with a legume crop," said Clain Jones, Extension soil fertility specialist in the Department of Land Resources and Environmental Sciences (LRES) at Montana State University (MSU). Annual legumes grown in Montana include field pea, lentils and chickpeas, whereas perennial legumes include alfalfa and sainfoin.

Dryland grain producers might be hesitant to plant a crop rather than fallow because soil moisture is often a limiting factor to wheat production. However, planting legumes rather than fallow can have several benefits. Legumes, with the proper soil bacteria, convert nitrogen gas from the air to a plant available form. Therefore, they do not need nitrogenfertilization, and can even add nitrogen to the soil.

"Much of the nitrogen benefit of legumes comes from the plant residue - shoots and roots. This gradually decomposes over a few years to provide plant available nitrogen and increase long term soil fertility," said Jones. Replacing fallow with any kind of crop has also been found to decrease nitrate leaching and saline seeps.

Whether as a replacement to fallow or part of annual rotations, the benefits of legumes go beyond nitrogen addition. According to work done in Saskatchewan, only a portion of the benefit from a legume in rotation-compared to continuous small grains-comes from the added nitrogen. The greatest benefit is improved soil structure, and breaking weed, disease, and insect cycles.

"Unincorporated pea residue may also enhance germination and survival of wheat under dry fall conditions because it provides soil cover to reduce evaporation loss," said Perry Miller, MSU professor in LRES.
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What is ur real.name
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Farmers grow leguminous plants after cereal crops to increase the fertility of soil .
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Leguminous crop grown after cereal crop to increase the fertility of soil and nutrients
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to replenish and recharge the soil with nitrogen 
 
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Yes it is important and it is beneficial to grow a leguminous crop after a cereal crop as leguminous crop have fertility and cereal crop sorry saine from have fertility and leguminous Dun doesn't show the fertility of cereal crop will be regained file leguminous crop show that every cloud has a beneficial effect and will grow serial wise that's why leguminous crops are very good for fertility and CL crops or not
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A farmer plants gram ( a luguminous crop ) before sowing a wheat crop. why
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As spring seeding time approaches, it's a good time to think about crop rotation and consider replacing some fallow ground with a legume crop," said Clain Jones, Extension soil fertility specialist in the Department of Land Resources and Environmental Sciences (LRES) at Montana State University (MSU). Annual legumes grown in Montana include field pea, lentils and chickpeas, whereas perennial legumes include alfalfa and sainfoin.

Dryland grain producers might be hesitant to plant a crop rather than fallow because soil moisture is often a limiting factor to wheat production. However, planting legumes rather than fallow can have several benefits. Legumes, with the proper soil bacteria, convert nitrogen gas from the air to a plant available form. Therefore, they do not need nitrogenfertilization, and can even add nitrogen to the soil.

"Much of the nitrogen benefit of legumes comes from the plant residue - shoots and roots. This gradually decomposes over a few years to provide plant available nitrogen and increase long term soil fertility," said Jones. Replacing fallow with any kind of crop has also been found to decrease nitrate leaching and saline seeps.

Whether as a replacement to fallow or part of annual rotations, the benefits of legumes go beyond nitrogen addition. According to work done in Saskatchewan, only a portion of the benefit from a legume in rotation-compared to continuous small grains-comes from the added nitrogen. The greatest benefit is improved soil structure, and breaking weed, disease, and insect cycles.

"Unincorporated pea residue may also enhance germination and survival of wheat under dry fall conditions because it provides soil cover to reduce evaporation loss," said Perry Miller, MSU professor in LRES.
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To increase nitrogen in the soil
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When the cereal crops like rice, wheat, maize are grown in the soil, it uses up a lot of nitrogenous salts from the soil. ... So by rotation a leguminous crop is grown. There plants have the ability to fix atmospheric nitrogen to form nitrogen compounds through the help of certain bacteria present in their root.
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