Вопрос школьника по предмету География
Какие две причины делают чернозём рекордсменом по плодородию?
Ответ учителя по предмету География
1.Самое большое среди прочих видов почв содержание гумуса-5%-15% что обеспечивает его плодородность.
2.значительное содержание почвеных микроэлементов.
3.прочная зернисто-комковая структура.
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