References
- Altschul, M. (1965). Proteins, their chemistry and their politics. Basic Books, New York, pp. 1–337.
- Bouldin, D. R. and Sample, E. C. (1958). The effect of associated salts on the availability of concentrated superphosphate. Soil Sci. Soc. Amer. Proc. 22, 124–129.
- Bouyouoos, G. D. (1962). Hydrometer method improved for making particle size analysis of soils. Agron. J. 54, 464–465.
- Bray, R. H. and Kurtz, L. T. (1945). Determination of total organic and available forms of phosphorus in soils. Soil Sci. 59, 39–45.
- Casady, A. J. (1965). Bulrush millet. EAAFRO Record of Research, Annual Report, 1965.
- Doggett, H. and Majisu, B. N. (1966). Bulrush millet breeding. EAAFRO Record of Research, Annual Report, 1966.
- Dowker, B. D. (1963). Sorghum and millets in Machakos District. E. Afr. agric. For. J. 29, 52–57.
- Egner, H.; Riehm, H. and Domingo, W. R. (1960). Untersuchungen Uber die Chemische Bodenanalyse als Grundlage fur die Beurteilung des nahroffzustandes der Boden. II. Chemische Extraktionsmethoden zur Phosphorund Kali-umestimmung. K. LantbHogsk. Annlr 26, 199–215.
- FAO/SIDA Lectures (1971). Delivered at the first FAO/SIDA Training Centre on maize, sorghum and millets for Africa and Near East, held in India, June to November, 1971.
- FAO/UNESCO (1974). Soil Map of the World, 1:5,000,000, Vol. I. Legend. Unesco, Paris.
- Jackson, M. L. (1962). Soil Chemical Analysis. Prentice Hall, Inc. Englewood Cliffs, New Jersey, U.S.A.
- Judy, W. H.; Mussa, I.; Yillabanu, M. and Zuberi, H. I. (1973). Cereals Trials in Tanzania. Bulrush and finger millet. EAAFRO Record of Research, Annual Report, 1973.
- Lindner, R. C. and Harley, C. P. (1942). Scientific apparatus and laboratory methods: A rapid method for determining nitrogen in.plant tissue. Science 96, 565–566.
- Loue, A. (1963). A contribution to the study of the inorganic nutrition of maize, with special attention to Potassium, Fertilite 20, pp. 1–57.
- Mehlich, A.; Pinkerton, A.; Robertson, W. and Kempton, R. (1962). Mass Analysis Methods for Soil Fertility Evaluation. N.A.L., Nairobi, Dept. of Agric., Kenya. (Cyol. Rept.).
- Miller, G. L. and Miller, E. E. (1948). Determination of nitrogen in biological material. Anal. Chem. 20, 481–488.
- Morrison, F. B. (1951). In Feeds and Feeding 21st ed., pp. 1154–1157. Morrison Publishing, Ithaca, New York, U.S.A.
- Muchena, F. N. and Njoroge, C. R. K. (1983). Soils of the Makueni Area map sheet 163, Report No. R5. Kenya Soil Survey, N.A.L., Nairobi.
- Murphy, J. and Riley, J. P. (1962). A modified single solution method for the determination of phosphate in natural waters. Anal. Chem. Acta 27, 31–36.
- Okalebo, J. R. (1977). Maize response to three high analysis phosphate fertilizer in some soils of East Africa. I. Effeot on growth and yield. E. Afr. agric. For. J. 43, 75–83.
- Olsen, S. R.; Cole, C. V.; Watanabe, F. S. and Dean, L. A. (1954). Estimation of available phosphorus in soils by extraction with sodium bicarbonate. USDA Circ. 939, 1954.
- Sadasiviah, T. and Rao, P. A. (1968). The uptake of nutrients by ragi (Elucine corrocana). Mysore J. Agric. Sci. 2, 133–140.
- Schumaker, G. (1966). Millet Agronomy. EAAFRO Record of Research, Annual Report, 1966.
- Siderius, W. and Muchena, F. N. (1977). Soils and Environmental conditions of Agricultural Research Stations in Kenya. Miscellaneous Soil Paper No. M5, 1977. Ministry of Agriculture, N.A.L., Nairobi, Kenya Soil Survey.
- Sombroek, W. G.; Braun, H. M. H. and Van de Pouw, B. J. A. (1982). Exploratory Soil Map and Agro-climatic Zone Map of Kenya. Kenya Soil Survey, Nairobi, N.A.L. pp. 44.
- Thomas, R. L.; Sheard, R. W. and Moyer, J. R. (1967). Comparison of conventional and automated procedures for N, P and K analysis of plant material using a single digestion. Agron. J. 59, 240–243.
- USDA/Soil Taxonomy (1975). Soil Survey Staff, Soil Conservation Service, USDA, Agric. Handbook 436, Washington D.C.
- Walkley, A. and Black, I. A. (1934). An examination of the Degtjareff method for determining soil matter and a proposed chromic acid titration method. Soil Sci. 37, 29–38.
- Whiteman, P. (1981). Personal communication on millets production in relation to the FAO Programme based at Katumani N.D.F.R.S., Kenya.
- Woodhead, T. (1968). In Studies of Potential Evaporation in Kenya, Physics Division, EAAFRO, Muguga.
- Wormer, T. M.; Omolo, E. and Marimi, A. M. (1982). Observations on the seed production of some crops grown in Kenya. Kenya Ministry of Agriculture, Scientific Research Division Paper No. 4.