这是保持土壤肥力的一个有效办法。
这是保持土壤肥力的一个有效办法。
It's also possible that this is just a symptom of the fertility treatments.
该肥使稻米品质提高，并有利于保持土壤肥力。
The fertilizer improved the quality of rice and helped preserve fertility in the soil.
一些作物本身就具备防治病虫害、保持土壤肥力的功效，人类辅以轮种；即便需要添加一些肥料，大多用的是人畜粪便。
Some plants would control pests and soil quality naturally, and humans helped by rotating their crops; if extra fertilizer was needed, manure usually filled in.
污泥对改善花生品质，保持和提高土壤肥力具有作用。
Applying sludge had positive effect on improving the quality of peanut, keeping and improving soil fertility.
水土保持林作为保持水土、防止土壤侵蚀的特有林种，对于提高土壤肥力具有重要作用。
Water and soil conservation forest that is a special forest to prevent soil erosion plays a very important role in improving soil fertility.
水土保持林作为保持水土、防止土壤侵蚀的特有林种，对于提高土壤肥力具有重要作用。
Water and soil conservation forest that is a special forest to prevent soil erosion plays a very important role in improving soil fertility.
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