Phytotoxicity of tebuthiuron applied at 0.12, 0.25, or 0.5 ppm to 10 different rangeland soils containing huisache in the greenhouse was inversely related with clay and organic matter contents. However, influences of soil properties were greatest at low herbicide dosages and could be masked by increasing tebuthiuron application rate. For example, tebuthiuron at 1 or 2 ppm killed the huisache after 287 days, regardless of soil, whereas 0.12 or 0.25 ppm killed huisache only when applied to soils with less than 15% clay (these soils contained less than 2.5% organic matter). Potential for tebuthiuron phytotoxicity appears to be greatly diminished in soils containing more than 30% clay. Although the effects of organic matter were confounded with soil clay contents in this study, variations in clay content consistently accounted for a greater proportion of variation in huisache response than did organic matter content. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.