The continuous use of fertilizer alone will eventually result in deterioration of soil pH, soil organic matter (SOM) and soil
physical properties. Inclusion of a leguminous crop such as mucuna (Mucuna pruriens) in a rotational system may alleviate
these problems. The major objective of this research was to investigate the effect of two phosphorus application levels and
four mucuna management options on SOM, soil pH, bulk density, particle density and porosity. Incorporation of mucuna at
flowering stage in combination with addition of 40 kg ha-1 P increased the SOM and porosity and decreased bulk and particle
density significantly compared to other treatments. All treatments where mucuna biomass were incorporated into the soil in
the absence of any P application resulted in increased soil pH (CaCl2) levels with values of > 5.2 which will be beneficial for
the production of most crops. The incorporation of above-ground biomass of mucuna had positive effects on all soil properties
investigated.