species/subspecies (Faidherbia albida, Acacia karroo, A. arenaria, A. nilotica ssp.
kraussiana, A. tortilis ssp. spirocarpa, A. tortilis ssp. heteracantha, A. senegal) in sterilised
and untreated soil. The untreated soil contained 103 rhizobia g− 1. In six of seven species in
untreated soil the multi-strain inoculated plants contained significantly more total nitrogen
than control plants. The exception was A. arenaria in which significant increase in total …