return crop residues to field

• 秸秆还田

return crop residues to field的用法和样例：

例句

1. Maize straw returning to the field can increase the soil total nitrogen and inorganic nitrogen content.
   秸秆还田增加了土壤全氮和无机氮含量。
2. Accumulation of organic acids and their phytotoxicity in paddy rice fields incorporated with crop straws have been widely concerned.
   摘要有机酸积累和毒害是稻田秸秆还田中受到广泛关注的问题。