Page 17

Update item information
Title Is Utah Sahara Bound?
Subject Agriculture--Utah; Land use--Utah
Description The 11th Annual Frederick William Reynolds Lecture.
Creator Cottam, Walter Pace, 1894-
Publisher Extension Division, University of Utah
Date 1947-02-19
Date Digital 2008-05-29
Type Text
Format image/jpeg
Digitization Specifications Original scanned on Epson Expression 10000XL flatbed scanner and saved as 400 ppi uncompressed tiff. Display images generated in PhotoshopCS and uploaded into CONTENTdm Aquisition Station.
Resource Identifier,458
Source LD5526 .U8 n.s. v.37 no.11
Language eng
Relation Digital reproduction of "Is Utah Sahara Bound?," J. Willard Marriott Library Special Collections
Rights Digital Image Copyright University of Utah
Metadata Cataloger Seungkeol Choe; Ken Rockwell
ARK ark:/87278/s6w66hr0
Setname uu_fwrl
Date Created 2008-07-29
Date Modified 2009-03-13
ID 319731
Reference URL

Page Metadata

Title Page 17
Description EVIDENCE OF VEGETATIONAL CHANGE 17 Through extensive data secured by the Western Range Survey6 in Wasatch County, Utah, an opportunity was afforded in 1937 to compare the forage of certain comparable plant types where the only variable seemed to be the grazing factor. A little more than half of Wasatch County was brought under the regulation of the Forest Service in 1910. These lands were surveyed to ascertain the grazing capacity of the various plant types. A plan of management based strictly on the findings of the survey was instigated. Adjacent privately owned property, originally similar in vegetation, continued to be heavily grazed without regard for numbers of stock or seasonal use. Stock was allowed to graze the private lands earlier in the spring and later in the fall. It can scarcely be claimed that only the better lands of Wasatch County were included under the Forest Service management. On the contrary, history shows that in the settlement of Utah the better lands came under private ownership first. Therefore, it seems sound to assume that at the beginning of the Forest Service management of the reserved lands of Wasatch County, the vegetative areas inside and outside the Forest boundaries were in 1910 similar in carrying capacity and in forage composition. Granting this assumption to be essentially sound, then any marked difference either in carrying capacity or in forage composition between private property and adjacent forest grazing lands today must be attributed to differences in range management. In comparing the forest ranges in Wasatch County with those privately operated, care was taken to select vegetative types essentially similar in their climate and soil requirements. The oak-snowberry type which includes only the upper limits of the oak belt, was selected as was also the aspen-snowberry type which occupies only the lower limits of the wide aspen belt. Figure I gives a graphic comparison of approximately 15,000 acres of the oak-snowberry type of vegetation inside and outside the Forest boundary in Wasatch County, Utah. The graph shows that the total plant cover outside the forest was 82 percent of a similar type inside the forest, but the forage value was only 50 percent as great. Only 48 percent as much grass, 39 percent as much palatable herbs, and 58 percent as much palatable shrubs grew in the oak-snowberry type outside the Forest as grew on the forest lands with better regulated grazing. This can only mean that under severe grazing, less palatable herbs and shrubs tend to replace the more palatable forage. The most important fact, however, is that the total plant cover decreases under heavy grazing use, thereby exposing the soil to the forces of erosion. Figure 2 presents a similar comparison between the aspen-snowberry type inside and outside the Forest boundary on approximately 30,000 acres. The plant cover of this type was found to be approximately the same on privately operated holdings as on forest lands, while the forage value was only 5 7 percent as much on private lands. An additional fact of interest here is that the aspen-snowberry type shows less deterioration than the oak-snowberry type. The aspen-snowberry type occupies a higher elevation where precipitation is
Format image/jpeg
Identifier 017-RNLT-CottamWP_Page 17.jpg
Source Original Manuscript: Is Utah Sahara Bound? by Walter P. Cottam.
Setname uu_fwrl
Date Created 2008-07-29
Date Modified 2008-07-29
ID 319706
Reference URL