Cattle Use of a Sprayed Aspen Parkland Range

Aspen parkland range in central Alberta that had been treated with a herbicide two years prior to the study had greater grazing use of the sprayed forest vegetation than did the untreated forest. The grazing use was usually greater in sprayed versus unsprayed grasslands but the difference was not as great as in the forest. During 1968 and 1969 when precipitation was heavy, the grasslands were extensively used. However, when dry conditions occurred, a greater use of the forest vegetation was observed. A regression equation was developed relating grazing use to precipitation.