Предмет: Биология, автор: alinochka20131alin

 в чем выражается плодородие почвы ?? 
почему в природе почвы не истощаются??

Ответы

Автор ответа: msfiallka
0
Плодородие почвы выражается содержанием в нем гумуса.Это могут быть отмершие остатки животных или растений.Почвы не истощаются потому что природе всегда идет круговорот.Тот, кто потреблял дары земли всегда превращается в органические вещества, которые обогащают почву.
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