Lt.Col.W.C.Ross and Dr.K.N.Bagchi of Bihar and Orissa in an article in recent number of the Journal of Indian Medical Research estimate that as a result of other observations at Patna in 19218.76 lbs.of nitric acid equivalent to 1.95 lbs.of nitrogen per acre is annually added to the soil.This figure appears to be too low.Dr.Leather investigated this problem Dun and Cawnpore estimated that about 3.5 lbs.of nitrogen are annually addd to the soil.The disparity in the two figures is apparently due to the fact that Messrs.Ross and Bagchi based their estimated the ammoniacal nitrogen as well.
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