一、引言:合理的农业措施应是既提高作物的产量和品质,又增加土壤的肥力,为达到此目的,有机肥和化肥都是必不可少的。通常有机肥可帮助维持并增进土壤肥力,而化肥可以增进土壤肥力,也可使土壤变得贫瘠起来,这就取决于施肥的种类。 二、土壤肥力和肥料:现在大部分宜耕地已开垦,? I. Introduction: Reasonable agricultural measures should not only increase the yield and quality of crops, but also increase the fertility of the soil. For this purpose, both organic fertilizer and chemical fertilizer are indispensable. Often organic fertilizers help maintain and enhance soil fertility, which can increase soil fertility and also render the soil infertile, depending on the type of fertilizer applied. Second, soil fertility and fertilizers: Most cultivated land has been reclaimed,?