Abstract
II. BEFORE the war the United Kingdom produced and exported large quantities of ammonia nitrogen, upwards of 70 per cent, of the home production being, in fact, exported. Indeed, the British export trade in ammonium sulphate was larger than that of any other country. On the other hand, she was entirely dependent upon the Chile product for her nitric nitrogen. Agriculture accounted for the major portion of the home consumption of fixed nitrogen, but this only represented 23.5 per cent, of the total home production and importation. Indeed, in proportion to the total area under cultivation, the United Kingdom uses less artificial nitrogenous fertilisers than any other progressive agricultural country.
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The Nitrogen Problems 1 . Nature 104, 568–570 (1920). https://doi.org/10.1038/104568a0
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DOI: https://doi.org/10.1038/104568a0