Abstract
IT is unfortunate that efforts to study the effect of various fertilizers on the cotton yield in Egypt have led to contradictory results. Thus Hughes1, Prescott2, and Khalil and co-workers3 have reported that manuring has very little or no effect on the yield of cotton crop, while Mahmoud and Crowther4,5,6 have shown that cotton produces better yield in response to nitrogen and phosphate applications, potash addition being without effect.
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References
Hughes, F., Year Book, Khedivial Agric. Soc. ( 1909).
Prescott, J. A., Bull. No. 13 Sultanic Agric. Soc. ( 1924).
Khalil, F., Gracie, D. S., and Enan, Ministry of Agric., Egypt, Chemical and Agric. Sec., 152, 1 ( 1935).
Mahmoud, A., and Crowther, F., Royal Agric. Soc., Egypt, Tech. Bull. 22 ( 1935).
Mahmoud, A., and Crowther, F., Royal Agric. Soc., Egypt, Tech. Bull. 26 ( 1936).
Mahmoud, A., and Crowther, F., Royal Agric. Soc., Egypt, Tech. Bull. 30 ( 1937).
Beauchamp, C. E., Plant Physiol., 15, 485 ( 1940).
Thomas, W., Soil. Sci., 59, 353 ( 1945).
Lineberry, R. A., and Leland, B., Plant Physiol., 18, 324 ( 1943).
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EL HINEIDY, M., ALLAM, F. Cotton Crop Yield in Relation to Application of Fertilizers. Nature 163, 362 (1949). https://doi.org/10.1038/163362a0
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DOI: https://doi.org/10.1038/163362a0
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