Download or read book Effects of Grazing Intensity Upon Vegetation written by Wallace M. Johnson and published by . This book was released on 1953 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Grazing Intensity Upon Vegetation written by Wallace M. Johnson and published by . This book was released on 1953 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Soil Applications of Insecticides on the Growth and Yield of Vegetable Crops written by Howard Boyd Peterson and published by . This book was released on 1953 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Grazing Intensity on Vegetation Composition on Reclaimed Mine Lands written by John Kouns and published by . This book was released on 1999 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Grazing Intensity Upon Vegetation and Cattle Gains on Ponderosa Pine bunchgrass Ranges of the Front Range of Colorado written by W. M. Johnson and published by . This book was released on 1953 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Grazing Intensity on Vegetation and Sheep Gains on Shortgrass Rangeland written by Frank Rauzi and published by . This book was released on 1967 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Grazing Intensity on Cattle Weights and Vegetation of the Bighorn Experimental Pastures written by and published by . This book was released on 1961 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Responses of Plant Communities to Grazing in the Southwestern United States written by Daniel G. Milchunas and published by . This book was released on 2006 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grazing by wild and domestic mammals can have small to large effects on plant communities, depending on characteristics of the particular community and of the type and intensity of grazing. The broad objective of this report was to extensively review literature on the effects of grazing on 25 plant communities of the southwestern U.S. in terms of plant species composition, aboveground primary productivity, and root and soil attributes. Livestock grazing management and grazing systems are assessed, as are effects of small and large native mammals and feral species, when data are available. Emphasis is placed on the evolutionary history of grazing and productivity of the particular communities as determinants of response. After reviewing available studies for each community type, we compare changes in species composition with grazing among community types. Comparisons are also made between southwestern communities with a relatively short history of grazing and communities of the adjacent Great Plains with a long evolutionary history of grazing. Evidence for grazing as a factor in shifts from grasslands to shrublands is considered. An appendix outlines a new community classification system, which is followed in describing grazing impacts in prior sections.

Download or read book Grazing Intensities and Systems on Crested Wheatgrass in Central Utah Response of Vegetation and Cattle written by Neil C. Frischknecht and published by . This book was released on 1968 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Grazing Intensity on Range Vegetation and Beef Cattle Production in the Northern Great Plains written by Walter R. Houston and published by . This book was released on 1962 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Different Systems and Intensities of Grazing Upon the Native Vegetation at the Northern Great Plains Field Station written by Johnson Thatcher Sarvis and published by . This book was released on 1923 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Root growth Stoppage Resulting from Defoliation of Grass written by Franklin Jacob Crider and published by . This book was released on 1955 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ecology of Biological Invasions of North America and Hawaii written by Harold A. Mooney and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: The diversity of the earth's climates superimposed upon a complex configuration of physical features has provided the conditions for the evolution of a remarkable array of living things which are linked together into complex ecosystems. The kinds of organisms comprising the ecosystems of the world, and the nature of their interactions, have constantly changed through time due to coevolutionary interactions along with the effects of a continually changing physical environ ment. In recent evolutionary time there has been a dramatic and ever-accelerating rate of change in the configuration of these ecosystems because of the increasing influence of human beings. These changes range from subtle modifications caused by anthropogenically induced alterations in atmospheric properties to the total destruction of ecosystems. Many of these modifications have provided the fuel, food, and fiber which have allowed the expansion of human populations. Unfortunately, there have been many unanticipated changes which accompanied these modifications which have had effects detrimental to human welfare in cluding substantial changes in water and air quality. For example, the use of high-sulfur coal to produce energy in parts of North America is altering the properties of freshwater lakes and forests because of acidification.

Download or read book Effect of Grazing Intensity on Cattle Weights and Vegetation of the Bighorn Experimental Pastures written by A. A. Beetle and published by . This book was released on 1961 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Parasitic Nematodes written by Bert Zuckerman and published by Elsevier. This book was released on 2012-12-02 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant Parasitic Nematodes, Volume III provides a comprehensive discussion of the different advances in plant nematology. This includes biochemical techniques to taxonomy and innovation in transmission and scanning electron microscopy technology. It explains a broadened basis for understanding nematode physiology and behavior and the sensory mechanisms that govern nematode actions and plant host-nematode interactions. The book discusses the development of modern approaches to the evaluation and reduction of crop losses. The emphasis of this volume is on plant parasites and insights gained through research on other nematodes. In particular, the book explains the anatomical, developmental, behavioral, and genetic studies on the free-living nematode Cenorhabditis elegans, which is a widely used laboratory model for examining various biological problems. The information provided by various researches on C. elegans increases our understanding about the relevance of nematodes to general biological processes in higher organisms, including man. The book is divided into 19 chapters which cover the following concepts of plant nematology: biochemistry, cytochemistry, and genetics; morphology and function; host-parasite relations; and evaluation and control of crop losses. The present volume is an excellent reference for students, lecturers, and research professionals in plant parasitology and related fields.

Download or read book The Theory of Ecology written by Samuel M. Scheiner and published by University of Chicago Press. This book was released on 2011-07-15 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite claims to the contrary, the science of ecology has a long history of building theories. Many ecological theories are mathematical, computational, or statistical, though, and rarely have attempts been made to organize or extrapolate these models into broader theories. The Theory of Ecology brings together some of the most respected and creative theoretical ecologists of this era to advance a comprehensive, conceptual articulation of ecological theories. The contributors cover a wide range of topics, from ecological niche theory to population dynamic theory to island biogeography theory. Collectively, the chapters ably demonstrate how theory in ecology accounts for observations about the natural world and how models provide predictive understandings. It organizes these models into constitutive domains that highlight the strengths and weaknesses of ecological understanding. This book is a milestone in ecological theory and is certain to motivate future empirical and theoretical work in one of the most exciting and active domains of the life sciences.

Download or read book Analysis of Generalized Linear Mixed Models in the Agricultural and Natural Resources Sciences written by Edward E. Gbur and published by . This book was released on 2012 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: Generalized Linear Mixed Models in the Agricultural and Natural Resources Sciences provides readers with an understanding and appreciation for the design and analysis of mixed models for non-normally distributed data. It is the only publication of its kind directed specifically toward the agricultural and natural resources sciences audience. Readers will especially benefit from the numerous worked examples based on actual experimental data and the discussion of pitfalls associated with incorrect analyses.