the major aim of processing satellite images is to prepare topical and effectivemaps. the selection of appropriate classification methods plays an important role. amongvarious methods existing for image classification, artificial neural network method is ofhigh accuracy. in present study, tm images of 1987, and etm+ images of 2000 and 2006were analyzed using artificial fuzzy artmap neural netwo...

a Rocky Mountain Research Station, United States Forest Service, Moscow, ID, United States b Forest, Rangeland, and Fire Sciences, University of Idaho, Moscow, ID, United States c McCall Outdoor Science School, University of Idaho, McCall, ID, United States d Forest and Wildlife Ecology, University of Wisconsin, Madison, WI, United States e School of Forest Resources and Environmental Science, ...

☆ Research was funded by USDA-NIFA, Rangeland Re 2009-38415-20265); and Western Sustainable Agricultu program (Project Number SW10-073). ⁎ Correspondence: Leslie M. Roche, Department of P University of California, Davis, CA, 95616, USA. E-mail address: [email protected] (L.M. Roche). http://dx.doi.org/10.1016/j.rama.2015.03.011 1550-7424/© 2015 Society for Range Management. Publis Article his...

PETER B. ADLER*, DANIEL G. MILCHUNAS†, WILLIAM K. LAUENROTH*†, OSVALDO E. SALA‡ and INGRID C. BURKE*† *Graduate Degree Program in Ecology, Colorado State University, Fort Collins, CO 80523, USA; †Department of Forest, Rangeland and Watershed Stewardship, Colorado State University, Fort Collins, CO 80523, USA; and ‡Department de Ecología, Facultad de Agronomía, Universidad de Buenos Aires, Avenu...

SUMMARY Results from various straight-and crossbreeding trials South Africa were reviewed. The conclusion is drawn that in instances, initial crossbreeding followed by inter ~ matin, crossbred cattle give the same if not better results than crossbreeding. This facilitates rangeland improvement as it number of pastures needed during the breeding season.

Choice functions on tournaments always select the maximal element (Condorcet winner), provided they exist, but this property does not hold in the more general case of weak tournaments. In this paper we analyze the relationship between the usual choice functions and the set of maximal elements in weak tournaments. We introduce choice functions selecting maximal elements, whenever they exist. Mor...

The mountain rangeland chain of Matmata (southern Tunisia) is characterised by an arid Mediterranean climate with severe droughts and high temperatures, combined substantial human disturbance....

Jack A. Morgan is plant physiologist and Feike Dijkstra is post-doc research ecologist at the Rangeland Resources Research Unit, Ronald F. Follett is research leader and soil scientist and Stephen Del Grosso is a soil scientist and ecologist at the Soil Plant Nutrient Research Unit, USDA Agricultural Research Service Northern Plains Area, Fort Collins, Colorado. Leon Hartwell Allen Jr. is soil ...

Rapid human population growth and habitat modification in the western United States has led to the formation of urban and exurban rangelands. Many of these rangelands are also home to populations of black-tailed prairie dogs (Cynomys ludovicianus). Our study aimed to compare the vegetation composition of an urban and exurban rangeland, and explore the role that prairie dogs play in these system...