Selenium Content of Forage and Hay Crops in the Pacific Northwest

Carter, D.L. and Brown, M.J. and Allaway, W.H. and Cary, E.E. (1968) Selenium Content of Forage and Hay Crops in the Pacific Northwest. Agronomy Journal. 60(5):532-534.

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Abstract

A map illustrating the Se content of forage and hay
crops in different sections of the Pacific Northwest was
prepared, based on analyses of crop samples. The primary
criterion used in mapping was to delineate areas
where forage and hay crops generally contain insufficient
Se to meet requirements of lambs and calves, and thus
prevent white muscle disease (WMD) and other Se-responsive
diseases. The minimal requirement may vary
from 0.03 to 0.10 ppm Se in the diet, depending upon the
diet level of vitamin E and possibly other substances.
Under normal livestock management practices, WMD
is common when forages and hay contain less than 0.10
ppm Se and the incidence is greater at lower Se levels.
The western half of Washington and Oregon and part
of northern California comprise an extremely low Se
area. The eastern half of Washington, northern Idaho,
extreme western Montana, and the northeast corner of
Oregon comprise a low Se area. Most of the remaining
portion of the Northwest may be considered as variable
in Se, with farm-to-farm variations common, but some
small areas of adequate Se were found and mapped.

Item Type:	Article
NWISRL Publication Number:	0113
Subjects:	Irrigated crops > Grass forage > Chemistry Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:49
Last Modified:	15 Mar 2017 21:26
Item ID:	4
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/4