Research Bulletin Volume 1-11

Research Bulletin Volume 1-11

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 edition. Excerpt: ...days. At the end of the incubation period, the soils were leached and the nitrates determined in aliquots by the phenolsulfonie acid method. The results of the work may be found in Tables VII, VIII, IX, and X and in the discussion only the average results of the nitrification of the ammonium sulfate and of the dried blood will be considered. TABLE VII. June 21, the effects of the lime were already noticeable, 8.737 mgs. N., 10.547 mgs. N., and 14.822 mgs. N. being formed in the samples from the three soils, when the ammonium sulfate was used, and 13.745 mgs. N., 15.844 mgs. N., and 21.911 mgs. N. being produced where the dried blood was employed. The three ton amount of lime showed proportionately greater effect than the two tons but again we must recall the 1908 applications of lime and modify our conclusions somewhat. It should be noted, however, that this increase in nitrifying power occurred notwithstanding the decreasing moisture content of the three plots, from 510 at 20.00 per cent through 509 at 19.00 per cent, to 508 at 17.00 per cent. Much greater effects of the lime are evidenced here in the nitrifying power of the soils than were shown either on the numbers of organisms, or on the ammonifying power of the soils. Possibly here, the immediate effect of the lime was to supply a lack of that material for uniting with the nitrous and nitric acids forms in the nitrification process, and consequently increased nitrifying power of the soils was quickly manifested. July 6, notwithstanding much lower moisture conditions, the nitrifying power of the soils had all increased. With the ammonium sulfate, 24.987 mgs. N., 25.475 mgs. N., and 29.034 nigs. N. were formed, and with the dried blood 27.056 mgs. N., 33.857 mgs. N., and 39.686 mgs. N. were...
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Product details

  • Paperback | 112 pages
  • 189 x 246 x 6mm | 213g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 123651839X
  • 9781236518392