1. Mixed cropping in Northern Nigeria. I. Cereals and groundnuts;Baker;Exp. Agric.,1978
2. Effects of temperature and radiation on lettuce growing;Bierhuizen;Neth. J. Agric. Sci.,1973
3. Weather, dry matter production and yield;Biscoe,1977
4. Nitrogen fixation in intercropping;Dart,1981
5. Crop Micrometeorology;Goudriaan,1977