Azam-Ali, S. N., Matthews, R. B., Williams, J. H. & Peacock, J. M. (1990). Light use, water uptake and performance of individual components of a sorghum/groundnut intercrop. Experimental Agriculture 26, 413–427.
Clark, E. A. & Francis, C. A. (1985). Transgressive yielding in bean:maize intercrops; interference in time and space. Field Crops Research 11, 37–53.
Connolly, J. (1986). On difficulties with replacement-series methodology in mixture experiments. Journal of Applied Ecology 23, 125–137.
Davis, J. H. C., Amézquita, M. C. & Muñioz, J. E. (1981). Border effects and optimum plot sizes for climbing beans (Phaseolus vulgaris) and maize in association and monoculture. Experimental Agriculture 17, 127–135.
Fisher, N. M. (1977). Studies in mixed cropping. I. Seasonal differences in relative productivity of crop mixtures and pure stands in the Kenya highlands. Experimental Agriculture 13, 177–184.
Francis, C. A., Prager, M. & Tejada, G. (1982). Effects of relative planting dates in bean (Phaseolus vulgaris L.) and maize (Zea mays L.) intercropping patterns. Field Crops Research 5, 45–54.
Giller, K. E., Ormesher, J. & Awah, F. M. (1991). Nitrogen transfer from Phaseolus bean to intercropped maize measured using 15N-enrichment and 15N-isotope dilution methods. Soil Biology and Biochemistry 23, 339–346.
Harris, D., Natarajan, M. & Willey, R. W. (1987). Physiological basis for yield advantage in a sorghum/groundnut intercrop exposed to drought. 1. Dry-matter production, yield, and light interception. Field Crops Research 17, 259–272.
Jones, M. J. (1987). Soil water and crop production in Botswana. Soil Use and Management 3, 14–19.
McGilchrist, C. A. & Trenbath, B. R. (1971). A revised analysis of plant competition experiments. Biometrics 27, 659–671.
Mead, R. & Willey, R. W. (1980). The concept of a ‘Land Equivalent Ratio’ and advantages in yields from intercropping. Experimental Agriculture 16, 217–228.
Nadar, H. M. (1983). Intercropping and intercrop component interaction under varying rainfall conditions in Eastern Kenya. 1. Maize/Bean intercrop. East African Agricultural and Forestry Journal 44, 166–175.
Nadar, H. M. & Faught, W. A. (1983). Effect of legumes on the yield of associated and subsequent maize in intercropping and rotation systems without nitrogen fertilizer. East African Agricultural and Forestry Journal 44, 127–136.
Nadar, H. M., Chui, J. N., Waweru, E. S., Bendera, N. & Faught, W. A. (1981). Agronomy research for marginal rainfall areas. Record of Research Annual Report 1977–1980, pp. 36–104. Kenya Agricultural Research Institute.
Pilbeam, C. J., Mahapatra, B. S. & Wood, M. (1993). Effect of soil matric potential on gross rates of nitrogen mineralization in an orthic ferralsol from Kenya. Soil Biology and Biochemistry 25, 1409–1413.
Rees, D. J. (1986). Crop growth, development and yield in semi-arid conditions in Botswana. II. The effects of intercropping Sorghum bicolor with Vigna unguiculata. Experimental Agricultural 22, 169–177.
Snaydon, R. W. (1991). Replacement or additive designs for competition studies? Journal of Applied Ecology 28, 930–946.
Stewart, J. I. & Kashasha, D. A. R. (1983). Rainfall criteria to enable response farming through crop-based climate analysis. East African Agricultural and Forestry Journal 44, 58–79.
Touber, L. (1983). Soils and vegetation of the Amboseli-Kibwezi area. Reconnaissance Soil Survey Report No. R6 (Eds Van der Pouw, B. J. A. & Van Engelen, V. W. P.). Kenya Soil Survey, Nairobi.
Trenbath, B. R. (1974). Biomass productivity of mixtures. Advances in Agronomy 26, 177–210.
Vallis, I., Haydock, K. P., Ross, P. J. & Henzell, E. F. (1967). Isotopic studies on the uptake of nitrogen by pasture plants. III. The uptake of small additions of 15N-labelled fertilizer by Rhodes grass and Townsville lucerne. Australian Journal of Agricultural Research 18, 865–877.
Vandermeer, J. (1984). Plant competition and the yield density relationship. Journal of Theoretical Biology 109, 393–399.
Willey, R. W. (1979). Intercropping – its importance and research needs. Part 1. Competition and yield advantages. Field Crop Abstracts 32, 1–10.
Willey, R. W. & Osiru, D. S. O. (1972). Studies on mixtures of maize and beans (Phaseolus vulgaris) with particular reference to plant population. Journal of Agricultural Science, Cambridge 79, 517–529.
Willey, R. W. & Rao, M. R. (1980). A competitive ratio for quantifying competition between intercrops. Experimental Agriculture 16, 117–125.
Willey, R. W. & Rao, M. R. (1981). A systematic design to examine effects of plant population and spatial arrangement in intercropping, illustrated by an experiment on chickpea/safflower. Experimental Agriculture 17, 63–73.