If farm-yard manure is used it must be well rotted.
如

农场的粪肥, 必须让
完全腐烂。
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She and her students are testing the effects on carbon storage of the compost that is created from waste — both agricultural, including manure and cornstalks, and waste produced in gardens, such as leaves, branches, and lawn trimmings.
她和她
学生正在测试由废物制造
堆
中储存
碳
作用,这些废物既来自农业废料,包括粪
和玉米杆,也来自花园中产生
废物,比如落叶、树枝和修剪草坪产生
废料。
传奇故事