Field experiments were conducted to determine the effect of peanut crop incorporated as green manure on the growth, total dry weight and grain yield of succeeding wheat. Growth of wheat was improved in treatments where peanut plants were incorporated as green manure resulting in an increase in total yield and grain yield of wheat. Total yield and grain yield were significantly (P ≤ 0.05) higher in all the treatments of peanut fields than the corresponding treatments of fallow fields. This indicates the significant role of nodulated peanut plants in improving the yield of a succeeding wheat crop. When used in a rotation system, peanut may contribute significant amounts of nitrogen to the system and reduce the requirements for fertilizers considerably, especially for smallholder farmers. More information is required on agronomic and agricultural aspects of nodulated plants to enable the symbiotic system to be exploited to its maximum. The need is also appropriate for a more skillful blending of fertilizer nitrogen and fixed nitrogen particularly in sustainable agricultural systems.