1. Borden, R. J., The effect of nitrogen fertilization upon the yield and composition of sugar cane. Hawaiian Plant. Rec.49, 259 (1945).
2. Broekmans, A. F. M., Growth, flowering and yield of the oil palm in Nigeria. J. West Afr. Inst. Oil Palm Research2, 187 (1957).
3. Burr, G. O.,et al., The sugar cane plant. Ann. Rev. Plant Physiol.8, 275 (1957).
4. Chapas, L. C., Plot size and reduction of variability in oil palm experiments. Empire J. of Exptl. Agr.29, 115 (1961).
5. Chapas, L. C., Tinker, P. B. H., and Ziboh, C. O., The determination of the oil content of oil palm fruit. J. West Afr. Inst. for Oil Palm Research2, 230 (1957).