古农书保存了大量的有关有机肥的种类、积制、施用方法及施肥原则等记载。
In antique agricultural books there was the recordation about the variety and use principle of organic fertilizers.
古农书保存了大量的有关有机肥的种类、积制、施用方法及施肥原则等记载。
In antique agricultural books there was the recordation about the variety and use principle of organic fertilizers.
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