1. Nematode population dynamics on common bean as affected by inter-cropping with maize;Abd Elgawad;Beitrage zur tropischen Landwirtschaft und Veterinarmedizin,1989
2. Fixation and excretion of nitrogen by tropical legumes;Agboola;Agron. J.,1972
3. The landscape ecology of agroforestry systems: an example from California;Altieri;Bull. Ecol. Soc. Am.,1992
4. Insect prevelence in bean (Phaseolus vulgaris) and maize (Zea mays) polycultural systems;Altieri;Field Crop Res.,1978
5. Mixed cropping;Arnon,1972