Энэ нь Link Таны хэл дээр байхгүй байгаа, Нь харах: English (en),
Эсвэл Google Translate ашиглах:  

www.soils.org/files/lessons/te...ide/tropical.pptx

Tropical Soils. Lush growth on top, but not fertile soil… Tropical soils are found under very hot conditions, and high yearly rainfall. They are the worlds oldest ..