Download or read book Downy Brome Bromus Tectorum L written by Philip E. Nesse and published by . This book was released on 1994 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Downy Brome Bromus Tectorum L Competition and Evaluation of Herbicidal Control for No till Hard Red Spring Wheat Triticum Aestivum L written by Michael Hal Ostlie and published by . This book was released on 2008 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exotic Brome Grasses in Arid and Semiarid Ecosystems of the Western US written by Matthew J. Germino and published by Springer. This book was released on 2016-01-22 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasions by exotic grasses, particularly annuals, rank among the most extensive and intensive ways that humans are contributing to the transformation of the earth’s surface. The problem is particularly notable with a suite of exotic grasses in the Bromus genus in the arid and semiarid regions that dominate the western United States, which extend from the dry basins near the Sierra and Cascade Ranges across the Intermountain Region and Rockies to about 105° longitude. This genus includes approximately 150 species that have a wide range of invasive and non-invasive tendencies in their home ranges and in North America. Bromus species that became invasive upon introduction to North America in the late 1800’s, such as Bromus tectorum and B. rubens, have since became the dominant cover on millions of hectares. Here, millenia of ecosystem development led to landscapes that would otherwise be dominated by perennial shrubs, herbs, and biotic soil crusts that were able to persist in spite of variable and scarce precipitation. This native ecosystem resilience is increasingly coveted by land owners and managers as more hectares lose their resistance to Bromus grasses and similar exotics and as climate, land use, and disturbance-regime changes are also superimposed. Managers are increasingly challenged to glean basic services from these ecosystems as they become invaded. Exotic annual grasses reduce wildlife and livestock carrying capacity and increase the frequency and extent of wildfi res and associated soil erosion. This book uses a unique ecoregional and multidisciplinary approach to evaluate the invasiveness, impacts, and management of the large Bromus genus. Students, researchers, and practitioners interested in Bromus specifically and invasive exotics in general will benefit from the depth of knowledge summarized in the book.
Download or read book Downy Bromegrass Bromus Tectorum L written by Richard S. Fawcett and published by . This book was released on 1984 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Control of Downy Brome grass Bromus Tectorum L in an Established Alfalfa Field written by Mark G. Wiltse and published by . This book was released on 1952 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Downy Bromegrass Bromus Tectorum L written by V.M. Jennings and published by . This book was released on 1977 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Invasive Plants of California s Wildlands written by Carla C. Bossard and published by Univ of California Press. This book was released on 2000 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Invasive nonnative plants threaten native species with habitat loss, displacement, and severe population declines, thus seriously reducing biodiversity. Invasive Plants of California's Wildlands is a tremendous source for land managers and others who are interested in protecting the rich natural heritage of California and surrounding states."--John C. Sawhill, President and CEO, The Nature Conservancy
Download or read book Integrated Management of Downy Brome in Winter Wheat written by Drew J. Lyon and published by . This book was released on 2020 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Downy brome (Bromus tectorum L.), also known as cheatgrass, is especially troublesome in low precipitation production areas where crop rotations are mostly limited to winter wheat followed by a year of summer fallow. The invasive weed is best controlled with a combination of management tools to reduce a plant population to an acceptable level while preserving the quality of natural resources
Download or read book Interference Growth and Physiological Respon s e of Downy Brome Bromus Tectorum and Medusahead Taeniatherum Asperum written by Abdullah Juma Al-Dakheel and published by . This book was released on 1986 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Integrated Management of Downy Brome Bromus Tectorum L Infested Rangeland written by Heather Elwood and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasive weed species are a threat to the health and functionality of many rangeland systems. Downy brome (Bromus tectorum) is an invasive annual grass that affects the productivity of rangelands by decreasing the grazing capacity for livestock as well as altering the wildfire cycle and competing against more desirable vegetation for limited resources. In 2006, an Invasive Plant Management Plan and Environmental Assessment was approved for Dinosaur National Monument, calling for prioritization of invasive species management on high value wildlife habitat, vector areas, and for species with a high ecological impact. The Cub Creek Watershed was identified as a priority for immediate attention due to its high historical, recreational, and environmental significance. This research was another phase of an integrated effort to manage vegetation in the Cub Creek Watershed and surrounding rangelands. Field work at two locations within Dinosaur National Monument was coupled with greenhouse experiments to evaluate chemical and mechanical methods of downy brome seed reduction and control, and to evaluate the response of four weedy grasses to herbicides used in broadleaf weed management practices.
Download or read book The Beet Leafhopper written by James Robert Douglass and published by . This book was released on 1954 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology in Agriculture written by Louise E. Jackson and published by Academic Press. This book was released on 1997-09-14 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agricultural crops are prominent features of an increasing number of variously perturbed ecosystems and the landscapes occupied by these ecosystems. Yet the ecology of agricultural-dominated landscapes is only now receiving the scientific attention it has long deserved. This attention has been stimulated by the realization that all agriculture must become sustainable year after year while leaving nearby ecosystems unaffected. Ecology in Agriculture focuses exclusively on the ecology of agricultural ecosystems. The book is divided into four major sections. An introduction establishes the unique ties between agricultural and ecological sciences. The second section describes the community ecology of these sorts of ecosystems, while the final section focuses on the processes that operate throughout these agricultural landscapes. - Contains an ecological perspective on agricultural production and resource utilization - Includes in-depth reviews of major issues in crop ecology by active researchers - Covers a range of topics in agricultural ecophysiology, community ecology, and ecosystems ecology - Provides examples of ecological approaches to solving problems in crop management and environmental quality
Download or read book ALS inhibitor Resistant Downy Brome Bromus Tectorum L Biotypes in Oregon written by Kee-Woong Park and published by . This book was released on 2003 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interference Growth and Physiological Respone of Downy Brome Bromus Tectorum and Medusahead Taeniatherum Asperum written by Abdullah Juma Al-Dakheel and published by . This book was released on 1986 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growth, competitive performance, and physiological response of the introduced annuals downy brome (Bromus tectorum L. ) and medusahead (Taeniatherum asperum (Sim.) Nevski) were compared under various environmental conditions in growth chambers and greenhouses. Seeds of both species were collected near Verdi, Nevada. Effects of soil moisture on growth, resource partitioning, photosynthesis, stomatal conductance, and transpiration rates were characterized for both species. Competitive interactions between the species were assessed in replacement series experiments. Under unlimited moisture, mean dry matter production and leaf area were greater in downy brome than medusahead. Height and root/shoot ratios were higher in medusahead or similar to those of downy brome. Mean values of relative growth rate (RGR) and net assimilation rate (NAR) over the entire growing period were similar between the species. RGR was significantly higher in downy brome o f 40 d age, and higher in medusahead of 40 d age. Rate of biomass allocation to leaf area (LAR) correlated best with dry matter production in both species. LAR was higher in downy brome than medusahead on most sample dates. Moisture stress reduced height, leaf development, and consequently biomass production in both species. Downy brome maintained higher dry matter production than medusahead when moisture was limited, due to higher LAR in downy brome. Stomatal conductance and transpiration rates were higher in medusahead than downy brome throughout the growing period. Under moisture stress, both species were similar in conductance and transpiration rates. Carbon fixation response (measured by IRGA in laboratory cuvettes) to light throughout the growing period were similar for the two species, regardless of moisture conditions. Moisture stress reduced photosynthesis in each species by > 50%. Competitive performance in mixtures was related to the maximum relative growth rate (Rmax) attained during early plant development. With unlimited moisture, downy brome had higher Rmax and LAR than medusahead. These differences gave competitive superiority to downy brome in interspecific mixture. Under moisture stress, both species were similar in Rmax and in general competitive performance. Effects of three temperature regimes and two moisture levels on growth, interference, and photosynthesis response in downy brome and medusahead were investigated in growth chamber study. Plants were grown separately and in intra- and interspecific pairs. Optimum temperature for growth of both species was the moderate temperature regime (24/11 C ). At this moderate regime, medusahead yield was higher than that of downy brome. Downy brome yield was less affected by temperature extremes and was significantly higher than that of medusahead at these extremes. Moisture limitation reduced yield in both species at all temperature regimes. Variation in performance between species at each temperature regime was closely related to photosynthetic response and pattern of resource allocation. In mixtures, downy brome had higher yield than medusahead at all temperature regimes. At low temperature (16/5C), both species were competitively similar. The competitive advantage of downy brome over medusahead increased with increasing temperature and was most profound at high temperature (32/16C). In limited moisture, downy brome maintained higher yield than medusahead in pure stands and mixtures. Species competitive performance in mixture also correlated with photosynthesis and resource allocation. Effects of nitrogen and phosphorus supply on growth and interference between downy brome and medusahead were studied in sand culture using a modified replacement series experiment in the greenhouse. Three levels of nitrogen and phosphorus were applied in all possible combinations. Height, number of leaves, and biomass production were reduced in both species in response to nutrient reduction. Downy brome had higher dry matter production than medusahead at high concentrations of nitrogen or phosphorus or when both nutrient elements were present. When either nutrient was lacking, yields of both species were similar. Nitrogen deficiency was more influential on yield reduction than phosphorus in both species. In mixtures, downy brome was highly competitive at high concentrations of N and P. At lower levels of N and P, the species performed as competitive equals. Thus, early patterns of resource allocation and high growth rates in downy brome enable that species to outperform medusahead at high nutrient concentrations. Findings of these studies were discussed in relation to the distribution of the two species in the field.
Download or read book Weeds of the West written by Robert Parker and published by . This book was released on 1998-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learning to identify unwanted plants around the home, farm, or ranch will be much easier with this comprehensive publication. It will help you identify plants that compete with native plants, horticultural, & agricultural crops as well as those that can poison livestock & people. This easy-to-use guide contains more than 900 full-color photos showing the early growth stages, mature plants, & features for positive identification of each weed discussed. Descriptions, habitats, & characteristics of each plant are also included. Glossary. Key to plant families. References. Index.
Download or read book Biology and Management of Noxious Rangeland Weeds written by Roger L. Sheley and published by . This book was released on 1999 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: In addition to the theory and principles of weed management, this book provides information about twenty-nine of the most serious weeds in the West, including weed identification, origin, history and distribution, invasion potentials, biology and ecology, and specific management options. Full-color photographs and distribution maps help illustrate the plants and the invasive threat they pose. An invaluable resource for land managers, resource specialists, and students of natural resource management, Biology and Management of Noxious Rangeland Weeds provides practical, science-based information needed for sustainable weed management and land restoration.
Download or read book Downy Brome Control Strategies for Southwestern Saskatchewan written by and published by . This book was released on 1993 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Downy brome (Bromus tectorum L.) has spread throughout southwestern Saskatchewan over the last 15 years to become a serious weed in various crops, pasture, and rangeland. This report presents results of field trials conducted over three years to evaluate herbicides, rotations, and intensive grazing as management tools for controlling downy brome. The investigators evaluated 26 herbicides for downy brome control and crop tolerance in winter wheat, fall rye, fallow, alfalfa, and grass hayland. They tested the compounds in isolation, as tank mixes, and with various adjuvants. Minor use proposals were submitted for five of the herbicides evaluated. The tests included evaluation of growth, seed production, and soil seedbank of downy brome in various crop rotations, and assessment of the effect of intensive spring grazing with cattle in reducing downy brome seed production.
