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Tebuthiuron Effects on Elemental Nutrients in Blue Grama (Bouteloua gracilis) Forage

Thomas N. Johnsen, Jr.
Weed Technology
Vol. 5, No. 1 (Jan. - Mar., 1991), pp. 194-197
Stable URL: http://www.jstor.org/stable/3986813
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Tebuthiuron Effects on Elemental Nutrients in Blue Grama (Bouteloua gracilis) Forage
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Abstract

Tebuthiuron has been found in soils and plants a decade after application to rangelands in semi-arid areas. Forage production, length of growing season, and preference by grazing animals are greater on treated than on untreated areas. It is not understood how these differences occur. Blue grama forage was assayed for concentrations of N, P, K, Ca, Cu, Fe, Mg, Mn, and Zn in treated and untreated plants on adjacent paired plots in the field, 6 to 11 yr after tebuthiuron applications at three locations in Arizona. Only Fe and Mn concentration differed among treatments, being significantly higher (P = 0.05) in blue grama from treated plots.

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