Testing Management-Oriented Hypotheses with Simulation Models

Author Institution: College of Forestry and Natural ResourcesWe need to manage and to use our renewable resources more wisely and yet more intensively in the future. To do this we need to incorporate more of our experience, our data, and our theory into the decision-making process. We can use simulation models in this synthesis effort to advantage. We can perform management experiments with ecosystem level models, generate meaningful output from those experiments, and condense and interpret this output in a manner useful to the management agency personnel. The result will be better resource management decisions based on scientifically and technically defendable information which will have greater internal consistency and which will produce better results under many conditions

Effects of the Intensity of Grazing on Range Livestock Production, the Native Vegetation, and the Soil Complex

Maximum sustained livestock production can be obtained only through proper grazing practices on the range and efficient feeding practices in the feedlot. Adjusting livestock numbers to prevent overuse of the range resource is the principle problem in securing purpose of South Dakota’s rangelands. There is considerable variation in the intensity of grazing on rangelands in the state. It is recognized that if a range is stocked too heavily the native vegetation deteriorates, causing decreased forage and livestock production and often considerable soil erosion. It is equally apparent hat too light grazing fails to make use of forage, and total livestock production per unit of land is decreased. An intensity of grazing study was initiated in 1942 at the Cottonwood Range Field Station to study the effects of heavy moderate, and light grazing on the vegetation and on cow and calf production. Results of the first nine years of this study were reported in South Dakota Agricultural Experiment Station Bulletin 412 in 1951. This thesis reports on the effects of the intensity of grazing on cow and calf production since 1952 and on the cumulative effects of different grazing intensities on the native vegetation and the soil complex, with observations of the effects of grazing treatments on the biota

A Plea for Fewer but More-Significant Digits

Using data from this journal, the author shows how considerable savings can be made in space and in reading time by rounding tabulated data.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 [email protected] for further information.Migrated from OJS platform August 202

An Artificial Rumen System for Range Nutrition Studies

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 [email protected] for further information.Migrated from OJS platform August 202

A Method for Random Location of Sample Units in Range Investigations

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 [email protected] for further information.Migrated from OJS platform August 202

Trends in Latin America affecting United States trade in tobacco.

no.3

Overview of the ecology of the Great Plains grasslands with special reference to climate and its impact, An

September 1975.On cover: Grassland Biome, Ecosystem analysis studies, U.S. International Biological Program.Includes bibliographical references (pages 71-93)

Trends in South and East Africa affecting United States trade in tobacco.

no.5