Logg på
JAMB - Biology (1981 - No. 37)
Soil is said to be fertile if
It is black
it can supply usable nutrients to plants
the oxygen content is very high
artificial manure is added to it
it is not waterlogged
Kommentarer (0)
Logg inn for å kommentere
Annonse
Tillat at javascript laster denne siden ordentlig
