Two seasons of cropping was carried out at three sites in the Guinea savanna to evaluate the residual effects of soybean on maize. The experiment was laid out as a split-plot in a randomized complete block with three replications. In the first season, four soybean varieties with a fallow treatment (control) received Phosphorus (P) applied as triple super phosphate (20%) at the rates of 0, 30 and 60 kg P/ha. Maize variety TZECOMP4C2 was grown in these plots in the second season. At all sites previous crop had no significant effect on total soil N and available P after the first season of cropping. Available P was however affected by previous year P rate at all sites. From initial values ranging from 5.2-16.2 mg/kg in the first season, available P significantly increased to between 13.6-42.8 mg/kg when 60 kg P/ha was applied compared to 7.7-18.6 mg/kg at no P application. Relative to no P application in the previous year, the application of 60 kg P/ha significantly increased total dry matter at 6 weeks after planting by 19%, total harvest dry matter by 28%, and grain yield by 37%.