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Differences in Chemical Composition of Plant Sample Fractions Resulting from Grinding and Screening 1
Author(s) -
Smith J. H.,
Carter D. L.,
Brown M. J.,
Douglas C. L.
Publication year - 1968
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1968.00021962006000020001x
Subject(s) - straw , chemical composition , grinding , red clover , agronomy , composition (language) , particle size , chemistry , particle (ecology) , hordeum vulgare , poaceae , zoology , materials science , biology , metallurgy , ecology , linguistics , philosophy , organic chemistry
Alfalfa, barley straw, corn leaves, peas, red clover, and wheat straw samples were ground in a Wiley mill and screened to separate particle sizes. Particle size samples were analyzed for N, P, K, Ca, Mg, Zn, Se, and SiO 2 The percentage composition of N, P, Ca, Mg, and Si0 2 generally increased with decreasing particle sizes of three wheat straw varieties, one baled and one hand‐cut sample each of barley straw and alfalfa, corn leaves, red clover, and peas. The K concentrations were unpredictable. Selenium tended to be more concentrated in the smaller than in larger particles. The variability in chemical composition because of particle sizes points out the necessity for adequate sample grinding and mixing for obtaining representative subsamples for chemical analyses and biological experiments.