S U M M A R YThree pearl millet and three cowpea genotypes were examined in intercropping systems on deep sandy soils in Niger between 1984 and 1987. The intercropped pearl millet genotypes usually produced at least 80% of their sole crop yields when the cowpea was planted two or more weeks after the pearl millet. The early maturing and spreading cowpea genotype contributed most to LER. All cowpea genotypes yielded more when planted in association with dwarf rather than the traditional tall pearl millet genotypes because they received more light.K. C. Reddy, J. Van der ploeg y I. Maga: Efectos del genotipo en el cultivo intercalado de mijo/caupi en los tropicos semidridos de Niger. RESUMENSe analizaron tres genotipos de mijo y tres de caupi' en sistemas de cultivos intercalados en suelos arenosos profundos en Niger entre 1984 y 1987. En general, los genotipos de mijo perla intercalado produjeron al menos el 80% de su rendimiento como monocultivo al plantar el caupi' a las dos semanas o maS despues del mijo perla. Los genotipos que contribuyeron mas al coeficiente de tierra de cultivo equivalente fueron los de caupi de maduracion temprana y rastrero. Todos los genotipos de caupi dieron un mayor rendimiento cuando se plantaron en asociacion con genotipos enanos de mijo perla en lugar de los genotipos tradicionales altos, al recibir mas luz.

SUMMARYThree pearl millet and three cowpea genotypes were examined in intercropping systems on deep sandy soils in Niger between 1984 and 1987. The intercropped pearl millet genotypes usually produced at least 80% of their sole crop yields when the cowpea was planted two or more weeks after the pearl millet. The early maturing and spreading cowpea genotype contributed most to LER. All cowpea genotypes yielded more when planted in association with dwarf rather than the traditional tall pearl millet genotypes because they received more light.