. â ^'»: 5f;(jf« .V''-J',';:''^?;''6£J;^'; â fc â .'Jixft.^ . Showing plots on which fertilisers are tested. the increased crop expected. In Central Europe (Switzerland, Germany, etc.) there are large cyanamide plants put up for the purposes of the war, but which could not without serious financial disturbance be scrapped ; ver}' vigorous attempts are therefore being made to overcome the disadvantages of this material. It is too early to say what results may be attained. It has been proposed to convert the cyanamide into urea or into ammonium salts, which could be sold alone or in admi
. â ^'»: 5f;(jf« .V''-J',';:''^?;''6£J;^'; â fc â .'Jixft.^ . Showing plots on which fertilisers are tested. the increased crop expected. In Central Europe (Switzerland, Germany, etc.) there are large cyanamide plants put up for the purposes of the war, but which could not without serious financial disturbance be scrapped ; ver}' vigorous attempts are therefore being made to overcome the disadvantages of this material. It is too early to say what results may be attained. It has been proposed to convert the cyanamide into urea or into ammonium salts, which could be sold alone or in admixture or combination with phosphates. A third method gives ammonia direct by a catalytic process, and from the fertiliser point of view the cheapest product would be ammonium chloride. Ex- periments are in hand at Rothamsted to determine the fertiliser value of this salt as compared with the well- known ammonium sulphate. In wet districts and wet than doubled in less than the ten-year period, estimates of the world's production capacity igi2, and 1920 are : Output. Long Tons. Reliable in 1903, 1920. Productive Capacity. Long Tons. Chile nitrate By-product sulphate of ammonia Fixation industry: Cyanamide Arc process Catalytic process 1,429,150 2,586,975 2,966,061 540,200 Nil Nil Nil 1, 75,000 Nil 2,015,440 1,777,000 1,503,000 4,018,286 8,515,801 Although many technical problems remain to be solved, it does not appear that any anxiety need be
Size: 3397px × 1471px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookleafnumber479, booksponsoruniversityofto, booksubjectscience
