Abstract
IN a communication, in NATURE1 it was reported that farm-yard manure (cow dung), when added to soil, fixes the atmospheric nitrogen, and that the value of cow dung lies not only in its nitrogen content but also in its power to fix atmospheric nitrogen. Field trials have confirmed this observation. That nitrogen fixation or accumulation takes place on the addition of farm-yard manure even in the soil of temperate climates is evident from the following results obtained in the classical field trials at Rothamsted :
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References
Dhar and Mukerji, NATURE, 138, 1060 (1936).
Dhar, presidential address to the National Academy of Sciences, December 1935 and January 1937.
Russell, "Soil Conditions and Plant Growth" (1931), p. 362.
Nemec, Foratwiss. Cbl., 53, 49, 147 (1931)
Dhar and Seshacharyulu, Proc. Nat. Acad. Sci. India, 11, 97 (1941).
MÄ rse, Mass. Agric. Exp. Sta. Bull, No. 33 (1936).
Dhar, NATURE, 134, 572 (1934).
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DHAR, N. IMPROVEMENT OF THE NITROGEN STATUS OF SOILS AND THE ORIGIN OF SOIL NITROGEN. Nature 151, 590–592 (1943). https://doi.org/10.1038/151590a0
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DOI: https://doi.org/10.1038/151590a0
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