@article{icrisat7864,
           title = {Residual Effect of Pigeonpea (Cajanus cajan) on Yield and Nitrogen Response of Maize},
       publisher = {Cambridge University Press},
          author = {J V D K K Rao and P J Dart and P V S S Sastry},
           pages = {131--141},
            year = {1983},
          volume = {19},
         journal = {Experimental Agriculture},
          number = {2},
             url = {http://oar.icrisat.org/7864/},
        abstract = {Field experiments during 1979 and 1980 on a Vertisol soil at ICRISAT Centre, Hyderabad, India, examined the residual effect of pigeonpea (Cajanus cajan) on growth and yield of a following maize crop. Pigeonpea was grown alone or as an intercrop with sorghum fertilized or not with 80 kg N ha?1. Sorghum alone and fallow treatments were included for comparison. In the first year, the sorghum/pigeonpea intercrop produced the largest grain and dry matter yields, but the yield of intercropped pigeonpea was about 50\% less than that produced by the sole crop. Pigeonpea alone had a large residual effect on maize, increasing grain yield by 57\% and total plant dry matter by 32\% compared with corresponding values after fallow. In comparison, intercrop pigeonpea had little residual effect. Maize following either fallow, sorghum grown alone, with or without N, or the sorghum/pigeonpea intercrop, again with or without N, required fertilizer equivalent to 38?49 kg N ha?1 in order to attain yields similar to that of unfertilized maize following sole crop pigeonpea}
}