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肥料的投入与作物产量的产出以及用地与养地的关系，是提高作物产量、改善品质、维持地力常新的关键。如果放松绿肥生产，优质有机肥料投入减少，将会给当地的农业生产带来令人堪忧的连锁反应。比如，土壤有机质的含量严重不足一作物所需的氮、磷、钾养分比例失调；绿肥及其他
The input of fertilizers, the output of crops and the relationship between land use and soil conservation are the keys to improving crop yield, improving quality and maintaining fertility. If we relax the production of green manures, the input of high-quality organic fertilizers will bring a worrying chain reaction to the local agricultural production. For example, the content of soil organic matter is seriously insufficient. The proportion of nitrogen, phosphorus and potassium required for crops is out of balance. Green manures and other