Evaluation of Soil Test Methods for the Estimation of Available Phosphorus in Some Tanzanian Soils-a Greenhouse Study

References

• Baver, L. D. and Bruner, F. H. (1939). Rapid soil tests for estimating the fertility needs of Missouri soils. Missouri Agric. Expt. Sta. Bull., 404.
   Google Scholar
• Bingham, F. T. (1962). Chemical tests for avail able phosphorus. Soil Sci., 94, 87–95.
   Google Scholar
• Clarke, R. T. (1962). Co-operative soil analysis project: report on the comparison of analyses from seven laboratories. E.A. Spec. Comm. on Soil Fertility, Tengeru, Tanzania.
   Google Scholar
• Bray, R. H. and Kurtz, L. T. (1945). Determination of total organic and available forms of phosphorus in soils. Soil Sci., 59, 39–45.
   Web of Science ®Google Scholar
• Chemistry Division, E.A.A.F.R.O., Muguga (1967). Methods for the analysis of soils, (mimeo.)
   Google Scholar
• Dickman, S. R. and Bray, R. H. (1940). Colorimetric determination of phosphorus. Ind. Engng. Chem. analyt. Edn., 12, 665–667.
   Google Scholar
• Fitts, J. W. and Nelson, W. L. (1956). The determination of lime and fertilizer requirements of soils through chemical tests. Adv. Agron., 8, 241–282.
   Google Scholar
• Friend, M. T. and Birch, H. F. (1960). Phosphate response in relation to soil tests and organic phosphorus. J. agric. Sci., 54, 341–347.
   Google Scholar
• Kesseba, A. and Uriyo, A. P. (1971). An evaluation of different methods of extraction for plant available phosphorus on an oxisol. Paper presented to Second Land Use Conference, Morogoro, Tanzania.
   Google Scholar
• Le Mare, P. H. (1959). Soil fertility studies in three areas of Tanganyika. Emp. J. exp. Agric., 27, 197–222.
   Google Scholar
• Mehlich, A.; Pinkerton, A.; Robertson, W. and Kempton, R. (1962). Mass analysis methods for soil fertility evaluation. Dept. Agric., Kenya, (mimeo.)
   Google Scholar
• Nandra, S. S. (1971). A comparative study of methods of soil analysis. Res. Tr. Inst., Mlingano, Ngomeni, Tanzania. Res. Bull. No. 52.
   Google Scholar
• Ogot, P.O. (1970). Evaluation of phosphorus soil test methods by greenhouse studies and laboratory tests. E. Afr. agric. For. J., 35, 336–339.
   Google Scholar
• Olsen, S. R. and Dean, L. A. (1965). Methods of soil analysis: Chemical and microbiological properties, 2, 1035–1049. Pub. by Amer. Soc. Agron., Madison, Wisc., U.S.A.
   Google Scholar
• Oommen, P. K. and Samki, J. K. (1972). Investigation on the scope of rapid soil tests for available phosphorus in some Tanzanian soils as judged by their correlation with crop responses for fertilizer recommendations—greenhouse study. Paper presented at the 12th Meeting of the E.A. Spec. Comm. for Soil Fertility and Crop Nutrition, Morogoro, Tanzania.
   Google Scholar
• Robinson, J. B. D. (1968). Advisory soil or plant analysis and fertilizer use. II—Evaluation of soil analysis methods with maize yield data. E. Afric. agric. For. J., 34, 140–152.
   Google Scholar
• Robinson, J. B. D. and Semb, G. (1968). Advisory soil or plant analysis and fertilizer use. I—Comparison of soil analysis methods. E. Afr. agric. For. J., 34, 117–127.
   Google Scholar
• Saunders, W. M. H. and Williams, E. G. (1955). Observations on the determination of total organic phosphorus in soils. J. Soil Sci., 6, 254–267.
   Web of Science ®Google Scholar
• Scaife, M. A. (1969). A simple means of deter mining maize fertilizer requirement. E. Afr. agric. For. J., 34, 461–463.
   Google Scholar
• Stiven, G. A. (1969). The prediction of the yield of cotton to application of superphosphate and sulphate of ammonia on the basis of soil analysis. Res. Tr. Inst., Ukiriguru, Tanzania. Prog. Rep. No. 15.
   Google Scholar
• Truog, E. (1930). The determination of readily available phosphorus of soils. J. Amer. Soc. Agron., 22, 874–892.
   Google Scholar
• Uhlen, G. and Semb, G. (1962). A comparison of the A-L method and the previously used methods for the determination of potassium and phosphorus in soil samples from field experiment plots. Forskning Og. forsk i Land-brukat, 189–207.
   Google Scholar
• Walker, T. W. and Adams, A. F. R. (1958). Influence of phosphorus content of parent materials on accumulation of carbon, nitrogen, sulphur and organic phosphorus in grassland soils. Soil Sci., 85, 307.
   Google Scholar
• Williams, E. G. (1962). Chemical soil tests as an aid to increased productivity. Trans. Joint Comm. IV-V, Int. Soc. Soil Sci., New Zealand, 820–834.
   Google Scholar
• Wilms, W. and Kopisch-Obuch, F. W. (1972). Res. Tr. Inst., Ifakara, Tanzania, Rep. for 1971–72, 94–104.
   Google Scholar