A field experiment was carried out for two consecutive seasons (2005/2006 and 2006/2007) in the Demonstration Farm of the Faculty of Agriculture at Shambat, University of Khartoum, Sudan, to study the effect of intercropping, phosphorus application and Rhizobium inoculation on the performance of some leguminous and cereal forage crops. The treatments used were pure stand, a mixture of Clitoria, lablab and Sudangrass, phosphorus fertilizer and Rhizobium inoculation. They were laid out in a completely randomized block design with three replications. Yield and quality were measured. Land equivalent ratio (LER) was calculated to evaluate intercropping versus monocropping. The results of the field experiment showed that, sole crop yield was higher than when grown in a mixture. The mixtures especially legume/legume combinations, gave more total forage yield than the sole crops. Nearly all the intercropping treatments had land equivalent ratio (LER) above one which indicated the advantage of intercropping over monocropping. Rhizobium inoculation and phosphorus application improved forage quality by increasing crude protein content. Intercropping and phosphorus fertilization decreased crude fiber percentage in the plant tissues.
