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The availability of the nitrogen in some bone materials used in horticulture
Author(s) -
Long M. I. E.,
Owen O.,
Winsor G. W.
Publication year - 1951
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740020304
Subject(s) - nitrogen , chemistry , sieve (category theory) , bone meal , distillation , incubation , ammonia , nitrate , fraction (chemistry) , meal , magnesium , zoology , chromatography , food science , biology , biochemistry , organic chemistry , mathematics , raw material , combinatorics , bran
The total nitrogen content of 16 commercial samples designated as bone meal showed a wide range of values from 2.12 to 5.55%. Samples of bone meal were added to soil in quantities equivalent to 300 p.p.m. nitrogen in each case, and the fraction of the total nitrogen readily converted to ammonia and nitrate was determined after incubation for nine days at 23.5° c.; these fractions so converted were significantly correlated with the percentage of the total nitrogen that was soluble in water. Significant correlations were also found with the bulk densities and sieve analyses of the milled samples, the pH of their aqueous suspensions, and the ammonia liberated on distillation with magnesia. The effect of different degrees of milling upon the results of the tests was examined for selected samples.