Browsing Journal of Range Management, Volume 31, Number 4 (July 1978) by Title
Now showing items 18-20 of 20
The Estimation of Winter Forage and Its Use by Moose on Clearcuts in Northcentral NewfoundlandThis study was designed to evaluate the effect of clearcutting on moose (Alces alces americana) populations in northcentral Newfoundland. Fourteen logged areas of various size and age were sampled for potential standing forage and current use. Balsam fir (Abies balsamea), white birch (Betula papyrifera), pin-cherry (Prunus pensylvanica), and willow (Salix spp.) were the most common forage species. Moose browsed most heavily upon pin-cherry, followed by birch and willow. Balsam fir was only lightly used. The most efficient sized plot for measuring browse production was found to be 6 m2. Available browse on balsam fir trees ≤5 m in height was measured by linear correlation with the product of stem diameter and height. Most winter browse was in cuts 8 to 10 years of age. The greatest use was in cuts 40 to 50 ha in size. A forest management plan which encourages a heterogeneous pattern of 40 to 50 ha block cuts and mature forest cover is suggested to be most compatible with the management of moose in northcentral Newfoundland.
The Influence of Ammonium Nitrate on the Control of Mesquite Resprouts with 2,4,5 T EsterThe influence of ammonium nitrate on the phytotoxicity of 2,4,5-T ester, nitrogen concentration, and niacin concentration of honey mesquite was studied. Fertilizer was applied to individual 3-year-old resprouts in the fall of 1973 and 2,4,5-T ester was applied to the individual 3-year-old resprouts on 3 dates in 1974. There was no conclusive evidence that N fertilizer affected the percentage of root-kill of mesquite when sprayed with 2,4,5-T ester. Ammonium nitrate had no effect on the nitrogen or the niacin levels in honey mesquite.
Vegetative Differences Among Active and Abandoned Towns of Black-tailed Prairie Dogs (Cynomys ludovicianus)Vegetational differences were studied among one active prairie dog (Cynomys ludovicianus) town and three towns which had been abandoned 1, 2, and 5 years, respectively. Blue grama (Bouteloua gracilis) and buffalograss (Buchloe dactyloides) were dominant on all four study areas. Percent cover of total vegetation, grasses, and increaser and invader species declined with length of abandonment. Percent cover of the only decreaser, western wheatgrass (Agropyron smithii), was similar on the abandoned towns and lowest on the active town. Composition of vegetation on the four study areas did not indicate that the usual stages of secondary succession on short grass prairie had occurred on the abandoned prairie dog towns. Most changes in vegetation following abandonment of 5 years or less by prairie dogs were apparently relatively minor and would not benefit cattle grazing significantly.