Table 4.

Microbial biomass (μg C g^-1 dry soil) of soils sampled under uninoculated and inoculated 13-year-old S. senegal trees during both dry and rainy seasons of the 2 years.

Treatments	First year		Second year
	Dry season April	Rainy season August	Dry season April	Rainy season August
Uninoculated trees	∗29 ± 2a	39 ± 3a	15 ± 2a	60 ± 6a
Inoculated trees	∗31 ± 3a	54 ± 4b	35 ± 5b	80 ± 9b

Values within a column sharing same letter comparing rhizobial inoculation treatment are not significantly different at P < 0.05 (Student–Newman–Keuls test). Each value represents the mean of 12 repetitions (six in each block).

^∗These values were obtained before inoculation.