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Original Articles

Advisory Soil or Plant Analysis and Fertilizer Use II—Evaluation of Soil Analysis Methods with Maize Yield Data

Pages 140-152 | Received 15 Sep 1967, Published online: 11 Dec 2015

References

  • Robinson, J. B. D. (1968). A chemical index for available soil nitrogen. E.A. agric. for. J., 33, 299–301.
  • Robinson, J. B. D. and Semb, G. (1968). Advisory soil or plant analysis and fertilizer use. Part I. Comparison of soil analysis methods. E.A. agric. for. J., 34.
  • Warren, R. G. and Cooke, G. W. (1962). Comparisons between methods of measuring soluble phosphorus and potassium in soils used for fertilizer experiments on sugar beet. J. Agric. Sci., 59, 269–280.
  • Robinson, J. B. D. (1968). Measuring soil nitrogen available to crops in East Africa. E.A. agric. for. J., 33, 269–280.
  • Robinson, J. B. D. (1968). A simple available soil nitrogen index. Part II. Field crop evaluation. J. Soil Sci., 19, 280–290.
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  • Robinson, J. B. D. (1966). A proposed regional project for the calibration of yield and fertilizer response of individual crops with soil and plant analysis values. E.A.A.F.R.O. Cyclos. paper 6 pp.
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  • Mehlich, A., Bellis, E. and Gitau J. K. (1964). Fertilizing and liming in relation to soil chemical properties. E.A. Spec. Comm. on Soil Fertility, April 1964. pp. 22.
  • Mehlich, A., Pinkerton, A., Robertson, W. and Kempton, R. (1962). Mass analysis methods for soil fertility evaluation. Dept of Agric., Kenya. Cycl. Rept. pp. 10.
  • Ulrich, A. and Ohki, K. (1966). Potassium. In Diagnostic Criteria for Plants and Soils. Ed. by Chapman, H. D., Pub. by Univ. of California, Div. of Agric. Sciences 1966, 362–393.
  • Mehlich, A. (1953). Determination of P, Ca, Mg, K, Na and NH, by the North Carolina Soil Testing Laboratory. (Mimeo. Raleigh, North Carolina.)
  • Semb, G. (1968). (Personal communication.)
  • Butlers, B. (1960). Some correlations between pot tests and analytical data for Uganda soils. E.A. Spec. Comm. on Soil Fertility, April 1960, pp. 3.
  • Mehlich, A and Bellis, E. (1960). Interpretation, use and present results of soil tests. E.A. Spec. Comm. on Soil Fertility. April 1960, pp. 18.
  • Kuria, H. R. (1968). (Personal communication.)
  • Scaife, A. (1968). Maize fertilizer experiments in Western Tanzania. J. Agric. Sci., 70, 209–222.
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  • Robinson, J. B. D. Advisory soil or plant analysis and fertilizer use III—Relationships between soil pH and maize yield responses to nitrogen and phosphorus fertilizers. E. Afr. agric. for. J. (at Press).

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