Also, organic farmers can improve their yields by making sure their crops get enough fertilizer. But increasing the nitrogen is harder to do organically, using just animal waste and crop rotations. Organic farmers rotate food crops with plants that fertilize the soil.此外，有机农民可以给作物施足量的肥料以提高产量，但仅仅使用动物粪便和作物轮作这种方式增加氮量很难。有机农民将粮食作物与能肥田的作物轮作。
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