傲;
In calcarious soil, the correlations between the refuse application rates and lettuce yield were expressed by logarithmic models perfectly and the marginal yield decreased as the refuse application increased, similar to the effect of fertilizer.
在石灰性土壤上,莴笋产量与垃圾用量间的关系符合对数模型,其边际产量随垃圾用量增加而减少,与一般肥料效应相似;
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