The results show that waterretaining agent have obvious effects of retaining water. But the effects don't rise with increase of the amount of waterretaining applied in soil.
研究表明保水剂具有明显的保水效果，但随着土壤中保水剂用量的增加，保水效果并没有表现出增加的趋势。
The results show that waterretaining agent have obvious effects of retaining water. But the effects don't rise with increase of the amount of waterretaining applied in soil.
研究表明保水剂具有明显的保水效果，但随着土壤中保水剂用量的增加，保水效果并没有表现出增加的趋势。
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