JAMB - Biology (2012 - No. 29)

An indigenous method of renewing and maintaining soil fertility is by

clearing farms by burning

planting one crop type

adding inorganic fertilizers yearly

crop rotation and shifting cultivation

Смхиман (0)

Сурталчилгаа

Javascript-д энэ хуудсыг зохих ёсоор ачаалахыг зөвшөөрнө үү