The content of quick effective nutrient of soil is formed by applying fertilizer for years.

土壤速效养分含量是多年培肥土壤形成的，不属当年施肥。

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The content of quick effective nutrient of soil is formed by applying fertilizer for years.

土壤速效养分含量是多年培肥土壤形成的，不属当年施肥。

youdao