return crop residues to field的用法和樣例：
例句
- Maize straw returning to the field can increase the soil total nitrogen and inorganic nitrogen content.
秸稈還田增加了土壤全氮和無機氮含量。 - Accumulation of organic acids and their phytotoxicity in paddy rice fields incorporated with crop straws have been widely concerned.
摘要有機酸積累和毒害是稻田秸稈還田中受到廣泛關注的問題。
