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Maize fertilizer experiments in Western Tanzania

Published online by Cambridge University Press:  27 March 2009

M. A. Scaife
M. A. Scaife
Affiliation:
Western Research Centre, Ukiriguru, Mwanza, Tanzania
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Summary

Results of 132 maize fertilizer experiments (NP and NPK) carried out over 3 years in Western Tanzania have been grouped to give sixteen ‘response areas’. Responses to N and P were very large in the south-western half of the research zone, where rainfall is fairly well distributed. On granitic soils around Lake Victoria, responses were mainly to N alone. In the drier areas, notably Shinyanga district, responses to both N and P were on average very small. No significant positive responses to K were found, except for one trial in Karagwe district.

It was found that all observed responses to N and P could be accounted for in terms of a generalized two-factor Mitscherlich-Baule yield equation, with constant curvature terms, cn and cv.

Using this equation it is possible to define ‘maximum economic requirements’ of the nutrients N and P for various maize and fertilizer prices and potential yields. The difference between this maximum requirement and the amounts of these nutrients supplied by the soil (given by the Mitscherlich-Baule parameters bn and bp',)represents the optimum rate of fertilizer application, where profit per acre is at a maximum.

Empirical equations are presented for estimating b from soil analysis results for areas not adequately covered by these experiments, but such estimates may not always be accurate.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 70 , Issue 2 , April 1968 , pp. 209 - 222
Copyright
Copyright © Cambridge University Press 1968

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References

REFERENCES

Baule, B. (1918). Zu Mitscherlichs Gesetz der physiologischen Beziehungen. Landw. Jbr 51, 363–85.Google Scholar
Cochran, W. G. & Cox, G. M. (1957). Experimental Designs, 2nd edn, p. 556. New York: Wiley and Son.Google Scholar
Colwell, J. D. & Esdaile, B. J. (1966). The application of production function analysis for the estimation of fertilizer requirements of wheat in northern New South Wales. Aust. J. exp. Agric. Anim. Husb. 6, 418–24.CrossRefGoogle Scholar
Crowther, E. M. & Yates, F. (1941). Fertilizer policy in war time. The fertilizer requirements of arable crops. Emp. J. exp. Agric. 9, 77–97.Google Scholar
Dagg, M. (1965). A rational approach to the selection of crops for areas of marginal rainfall in East Africa. E. Afr. agric. For. J. 30, 296–300.Google Scholar
Duthie, D. W. (Ed. [1953]). Crop responses to fertilizers and manures in East Africa. E. Afr. agric. J. 19, 19–57.Google Scholar
, F.A.O. (1966). Statistics of crop responses to fertilizers, p. 97. Rome: F.A.O.Google Scholar
Goldsworthy, P. R. (1967). Responses of cereals to fertilizers in Northern Nigeria, I. Sorghum. Expl Agric. 3, 29–40.Google Scholar
Jensen, D. & Pesek, J. (1959). Generalization of yield equations in two or more variables. Agron. J. 51, 255–63.CrossRefGoogle Scholar
Milne, G. (1938). Essays in applied pedology. III. Bukoba. High and low fertility on a laterised soil. E. Afr. agric. J. 4, 13–24.Google Scholar
Milne, G. (1947). A soil reconnaissance journey through parts of Tanganyika Territory, December 1935 to February 1936. J. Ecol. 35, 192–265.Google Scholar
Mitscherlich, E. A. (1909). Das Gesetz des Minimums und das Gesetz des abnehmenden Bodenertrages. Landw. Jbr 38, 537–52.Google Scholar
Morison, C. G. T. & Wright, B. I. (1950). The soils of Sukumaland. Mimeo.Google Scholar
Mukerjee, H. N. (1960). Realistic determination of nutrient requirements of soils through extensive random simple experiments on farmers' fields. Trans. 7th Int. Congr. of Soil Science, vol. III. Commission IV, pp. 112–22.Google Scholar
Munson, R. D. & Doll, J. R. (1959). The economics of fertilizer use in crop production. Adv. Agron. 11. 133–69.CrossRefGoogle Scholar
Pawson, E. (1957). The composition and fertility of maize soils in Northern Rhodesia. Emp. J. exp. Agric. 25, 80–94.Google Scholar
Scatfe, M. A. (1966). Annual Report, Western Research Centre, Ukiriguru, Tanzania. Mimeo.Google Scholar
Teale, E. O. (1929). The soil and agricultural development in relation to the geology of portions of northern Kigoma and Southern Bukoba provinces. Geological Survey, Tanganyika; Short paper No. 4.Google Scholar
Truog, E. (1930). The determination of the readily available phosphorus of soil. J. Am. Soc. Agron. 22, 874–82.Google Scholar
Turner, D. J. (1966). An investigation into the causes of low yield in late-planted maize. (Studies undertaken at the Central Research Centre, Ilonga, Tanganyika.) E. Afr. agric. For. J. 31, 249–60.Google Scholar
Willcox, O. W. (1955). Agrobiologic percentage method of evaluating fertilizer tests. I. Potash and Tobacco. Soil Sci. 79, 467–73.Google Scholar
Yates, F. (1937). The Design and Analysis of Factorial Experiments, p. 42. Farnham Royal: Commonwealth Agricultural Bureaux.Google Scholar