再强调一遍，这些因素不能增加产量，但如应用得当，可使产量形成因素达到的产量潜势得到保护。
Again, these factors do not increase the yield, but only protect the yield potential that has been built through proper selection and utilization of the yield-building factors.
再强调一遍，这些因素不能增加产量，但如应用得当，可使产量形成因素达到的产量潜势得到保护。
Again, these factors do not increase the yield, but only protect the yield potential that has been built through proper selection and utilization of the yield-building factors.
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