The input of NPK as either organic manures or chemical fertilizers not only greatly improved soil productivity but also was of benefit to the soil as a carbon sink.
试验结果表明：以有机肥或以化肥形式配合施用NPK不但可以极大提高土壤生产力，而且有益于增加土壤有机碳储量。
Low eastern plains restoration of multi-district should increase the intensity of improved soil Suitable for the cultivation of crops to improve the productivity of land.
东部平原多级恢复力区应加大改良土质的力度，种植适宜的农作物，以提高土地生产力；
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