Prairie threeawn (Aristida oligantha Michx.) is an indicator of deteriorated range and is unpalatable and mechanically injurious to livestock. The effects of date of burning (November, February, or April) and atrazine [2-chloro-4-ethylamino)-6+isopropylamino)-5-triazine] applied in March at 0 or 1.12 kg/ha were evaluated in north-central Oklahoma on tallgrass prairie hay meadows infested with prairie threeawn. Atrazine provided consistent control of prairie threeawn and increased yield of desirable species in 2 of the 3 studies. Burning in April reduced prairie threeawn in 1 of 3 studies, but burning in February or November did not reduce prairie threeawn in any of the studies. Combining atrazine and burning controlled prairie threeawn no better than atrazine alone when burning was several months before or after application of atrazine. However, burning just 1 month before application of atrazine decreased the activity of atrazine on prairie threeawn. Burning alone or burning combined with atrazine did not increase production of desirable species. 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.