Differences in Chemical Composition of Plant Sample Fractions Resulting from Grinding and Screening

Smith, J.H. and Carter, D.L. and Brown, M.J. and Douglas, C.L. (1968) Differences in Chemical Composition of Plant Sample Fractions Resulting from Grinding and Screening. Agronomy Journal. 60(2):149-151.

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Abstract

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 SiO₂
The percentage comeosition of N, P, Ca, Mg, and SiO₂
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.

Item Type:	Article
NWISRL Publication Number:	0094
Subjects:	Research methodology Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:54
Last Modified:	15 Mar 2017 21:59
Item ID:	686
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/686