Abstract
The growth and biomass production of six acacia species were studied in the field for 4 years. The species used were
Acacia asak,
A. negrii,
A. seyal, A. karroo,
A. ampliceps, and
A. stenophylla. The first three species are indigenous while the others are exotic. The results showed both A. ampliceps and A. asak with 100% survival while all
A. negrii died.
Acacia ampliceps attained the greatest height, diameter, relative growth rate and above-ground biomass while
A. asak had the least. Height and diameter growth of acacia species decreased between warm and cold periods of the year.