• Testing for Outlying Observations in a Sample Group

      Bonham, Charles D. (Society for Range Management, 1971-07-01)
      The need to test for "outliers" is often overlooked both in statistical analyses of data, and in applied statistics courses. Instead of discarding an "odd" value from the sample data based on intuition, an objective approach should be used in handling spurious values found in a data group. An outlier testing procedure can be also useful in constructing future sampling designs.
    • Testing New Range Forage Plants

      Schwendiman, J. L. (Society for Range Management, 1958-03-01)
    • Tetraploid Perennial Teosinte Seed Dormancy and Germination

      Mondrus-Engle, M. (Society for Range Management, 1981-01-01)
      Tetraploid perennial teosinte is an endangered Mexican relative of maize with potential for use as a tropical rangeland and permanent pasture forage. Seeds are dormant when harvested, becoming more germinable as they afterripen. New-seed dormancy may be broken by pre-soaking seed in a gibberellic acid solution. Other pre-treatments are less effective or inhibit germination. Seeds enclosed in white fruitcases are less germinable than those in dark fruitcases, and frequently lack developed embryos./El teosinite tetraploide perenne es una gramínea rara, indígena a México y afín al maíz, que se puede utilizar en los pastizales y pastos permanentes tropicales. Las semillas están en estado durmiente al cosechar, y aumenta la germinación después de un período de maduración. El período durmiente de las semillas se puedc terminar por medio de remojarlas en una solución del ácido giberélico. Otros medidas de terminar el período durmiente son menos efectivas o impiden la germinación. Las semillas blancas son menos capaz de germinar que las de color oscur, y frecuentemente carecen del embrión.
    • Texas GLCI: Growing Partnerships on Texas Grazing Lands

      Goodwin, Jeff; Moseley, Mark (Society for Range Management, 2012-08-01)
      The United States comprises more than 634 million acres of nonfederal grazing lands. Under proper management, these private grazing lands contribute to the health and economic sustainability that the nation has relied on for many years. Private grazing land owners understand the need for continued grazing land technical assistance. Providing a mechanism to attain sound, science-based, proven conservation alternatives to address the nation’s grazing land resource concerns is of paramount importance to these land owners. The loss of trained individuals providing technical assistance would be detrimental not only to new grazing land managers but also to established operations that have been using this technical assistance for years to make difficult ranch management decisions. This loss of trained individuals did occur in the past: the loss of USDA– Natural Resource Conservation Service (NRCS) technical resources on grazing lands was a by-product of the 1985 Farm Bill, which diverted many NRCS employees to cropland conservation compliance and other programs. The Grazing Lands Conservation Initiative (GLCI) was formed in response to this decline in technical assistance on private grazing lands. 
    • Texas Section Photo Contest

      Society for Range Management, 2008-12-01
    • Texas Wintergrass and Buffalograss Response to Seasonal Fires and Clipping

      Ansley, R. James; Castellano, Michael J. (Society for Range Management, 2007-03-01)
      There is increased interest in the use of summer-season fires to limit woody plant encroachment into grasslands, but effects of these fires on grasses are poorly understood. We quantified effects of repeated winter fires, repeated summer fires, and clipping (to simulate grazing) on aboveground total yield, live yield, and percentage of live tissue of C3 Texas wintergrass (Nassella leucotricha [Trin. Rupr.] Pohl.), and C4 buffalograss (Buchloë dactyloides [Nutt.] Engelm.) in 2 experiments. Monospecific patches of each species were exposed to 1 of 3 fire treatments (no-fire, 2 winter fires in 3 years, or 2 summer fires in 3 years) and 1 of 2 clip treatments (no clip or clip once each spring). Experiment 1 evaluated effects of fire without grazing or clipping on late-growing season (late-season) yields. Late-season total yield of both species recovered from winter and summer fires within 1 or 2 growing seasons post-fire. By 3 years post-fire, Texas wintergrass late-season total yield was 2 times greater in the summer fire treatment than the winter fire or no-fire treatments, and buffalograss late-season total yield was 3 times greater in summer and winter fire treatments than in the no-fire treatment. Experiment 2 evaluated combined effects of fire and clipping the previous spring on spring-season yields. Clipping alone or with fire (summer or winter) reduced Texas wintergrass yields on more sample dates than occurred with buffalograss. By 3 years post-fire, buffalograss spring total yield was greater in all fire and fire + clip treatments than in the clip only or untreated controls. Results suggest: 1) both species were tolerant of summer fire, 2) fire in either season with or without clipping stimulated buffalograss production, and 3) buffalograss was more tolerant than Texas wintergrass to the combined effects of clipping + fire (either season). 
    • The "7-P's of Rangeland"

      Nichols, James T. (Society for Range Management, 1986-02-01)
    • The "Gustavo Aguirre Benavides" Botanical Garden

      Society for Range Management, 1990-04-01
    • The "Wrong Rock" in Coal Mine Reclamation

      Larson, Larry L. (Society for Range Management, 1983-10-01)
    • The 1080 Livestock Protection Collar for Predator Control

      Scrivner, Jerry H.; Wade, Dale A. (Society for Range Management, 1986-06-01)
    • The 33 Ranch: Stewardship in Action

      Kutzler, Darlene (Society for Range Management, 1998-06-01)
    • The Abortifacient and Toxic Effects of Big Sagebrush (Artemisia tridentata) and Juniper (Juniperus osteosperma) on Domestic Sheep

      Johnson, A. E.; James, L. F.; Spillett, J. (Society for Range Management, 1976-07-01)
      Big sagebrush (Artemisia tridentata) fed to sheep by stomach pump to study its abortifacient properties during the 2nd trimester of pregnancy produced no reproductive difficulties. However, big sagebrush was lethal when 3/4 lb was fed by this method daily for 1, 2, or 3 days. Sagebrush fed 1/4 lb daily and slowly increased to 3/4 lb daily was not toxic. These findings confirm many general reports of suspected sagebrush toxicity and indicate the need for caution in moving sheep rapidly onto big sagebrush areas. Juniper (Juniperus osteosperma) fed to sheep in 1 lb daily amounts in an interrupted series of feedings totaling 30 days in the 2nd and early 3rd trimester of pregnancy caused abortion in 2 sheep and birth of a weak lamb from a 3rd sheep. Attempts to confirm these findings by feeding juniper to other sheep during gestation days 60 to 90 were unsuccessful.
    • The Accuracy of Ground-Cover Measurements

      Booth, D. T.; Cox, S. E.; Meikle, T. W.; Fitzgerald, C. (Society for Range Management, 2006-03-01)
      Ground cover is a key indicator of rangeland condition and influences rangeland management decisions, yet there have been few advances in ground-cover measurement methods. The advent of digital photography and automated image processing promise a revolution in the way ground cover is measured. To assess the potential for automation we compared conventional and automated methods for measuring ground cover against known artificial populations. The known populations were created from 20 nadir images of a Wyoming big sagebrush (Artemisia tridentata Nutt. ssp. wyomingensis Beetle Young) vegetation type acquired with a 5-megapixel Olympus E20 digital single lens reflex camera mounted on an aluminum camera frame at 2 m above ground level. The images were converted to color, 2-dimensional images that no longer represented real-world conditions but had known cover values and conserved a simplified form of the pattern and spatial context of the plant community. These images were then printed at 1:1 scale to a 1 X 1-m poster. Posters were evaluated for color cover under laboratory conditions using the conventional techniques of steel-point frame, laser-point frame, line-point intercept, ocular estimation, and line intercept. Photographs of the posters were measured for color cover using standard and custom-created algorithms within the VegMeasure image analysis framework, and using the Digital Grid Overlay method. Results indicate that conventional techniques had significantly greater correlation (92% agreement of measured to known) than measurements from the algorithms used in the VegMeasure analysis (70%). The critical factor influencing accuracy of point-sampling methods was the area of the contact point for the given method. These findings provide an important measure of relative accuracy among methods for land managers and for researchers seeking to improve rangeland monitoring methods. 
    • The Adaptation and Production of Species and Selections of Grasses and Clover in Colombia

      Crowder, L. V.; A. Vanegas, J.; Lotero C., J.; Michelin, A. (Society for Range Management, 1959-09-01)
    • The Administration of Canadian Rangelands

      Willis, T. G. (Society for Range Management, 1957-03-01)
    • The American Society of Range Management and Conservation—What Does It Mean to Us?

      Poulton, Charles E. (Society for Range Management, 1969-09-01)
    • The Animal Rights Battle

      Woolverton, Michael (Society for Range Management, 1989-02-01)
    • The Animal-Unit and Animal-Unit-Equivalent Concepts in Range Science

      Scarnecchia, D. L. (Society for Range Management, 1985-07-01)
      The terms animal-unit and animal-unit-equivalent have evolved as a means of expressing different kinds and classes of livestock in a common form. This paper discusses the evolution of the concepts, analyzes their conceptual boundaries, and discusses their use in the analysis of range livestock systems. Recent efforts to modify these concepts to develop livestock species substitution ratios for specific ranges are discussed. For greater usefulness in describing range livestock systems, animal-unit-equivalents should be calculated based only on animal-related factors. Also, the animal-unit-equivalent concept should not be redefined in the calculation of pasture-specific substitution ratios.
    • The Apparent Digestibility of Lignin by Mule Deer

      Smith, A. D.; Turner, R. B.; Harris, G. A. (Society for Range Management, 1956-05-01)
    • The Approximation of Cattle Diet through Herbage Sampling

      Halls, Lowell K. (Society for Range Management, 1954-11-01)