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Author: W. F. Mann Publisher: ISBN: Category : Herbicides Languages : en Pages : 24
Book Description
This paper reviews the past 15 years of research at Alexandria, Louisiana, on 10 of the newer herbicides that are in use or show promise. Only formulations with relatively high activity are included.?The report is based on more than 60 studies, including soil, foliar, and injection applications. The outlook is good for effective substitutes for herbicides now in use. and for new products that hiill control a broader array of species with greater consistency.
Author: W. F. Mann Publisher: ISBN: Category : Herbicides Languages : en Pages : 24
Book Description
This paper reviews the past 15 years of research at Alexandria, Louisiana, on 10 of the newer herbicides that are in use or show promise. Only formulations with relatively high activity are included.?The report is based on more than 60 studies, including soil, foliar, and injection applications. The outlook is good for effective substitutes for herbicides now in use. and for new products that hiill control a broader array of species with greater consistency.
Author: Robert L Zimdahl Publisher: Elsevier ISBN: 0123815029 Category : Science Languages : en Pages : 220
Book Description
It is important that scientists think about and know their history - where they came from, what they have accomplished, and how these may affect the future. Weed scientists, similar to scientists in many technological disciplines, have not sought historical reflection. The technological world asks for results and for progress. Achievement is important not, in general, the road that leads to achievement. What was new yesterday is routine today, and what is described as revolutionary today may be considered antiquated tomorrow. Weed science has been strongly influenced by technology developed by supporting industries, subsequently employed in research and, ultimately, used by farmers and crop growers. The science has focused on results and progress. Scientists have been--and the majority remain--problem solvers whose solutions have evolved as rapidly as have the new weed problems needing solutions. In a more formal sense, weed scientists have been adherents of the instrumental ideology of modern science. That is an analysis of their work, and their orientation reveals the strong emphasis on practical, useful knowledge; on know how. The opposite, and frequently complementary orientation, that has been missing from weed science is an emphasis on contemplative knowledge; that is, knowing why. This book expands on and analyzes how these orientations have affected weed science's development. - The first analytical history of weed science to be written - Compares the development of weed science, entomology and plant pathology - Identifies the primary founders of weed science and describes their role
Author: United States. Superintendent of Documents Publisher: ISBN: Category : Government publications Languages : en Pages : 1250
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Author: Robert Zimdahl Publisher: Academic Press ISBN: 0323149421 Category : Technology & Engineering Languages : en Pages : 465
Book Description
Fundamentals of Weed Science provides an introduction to the basic principles of weed science for undergraduate courses. It discusses several aspects of weed biology and control, and traces the history of herbicide development. The book begins with an introduction to weeds, covering their definition, characteristics, harmful aspects, and the cost of weed control. This is followed chapters on weed classification, the uses of weeds, weed biology, weed ecology, allelopathy, the significance of plant competition, weed management and control methods, and biological weed control. Later chapters deal with herbicidesthe most important weed control tools and the ones with the greatest potential for untoward effects. Students of weed science must understand herbicides and the factors governing their use as well as the potential for misuse. These chapters discuss chemical weed control, the properties and uses of herbicides, factors affecting herbicide performance, herbicide application, herbicide formulation, ecological impact of herbicides, pesticide registration and legislation, weed management systems, and the future of weed science.
Author: W. F. Mann
Author: W. F. Mann
Author: Robert L Zimdahl
Author: Southern Forest Experiment Station (New Orleans, La.)
Author: 
Author: United States. Superintendent of Documents
Author: 
Author: Robert Zimdahl
Author: 
Author: Southern Forest Experiment Station (New Orleans, La.)
Author: Stephanie M. Jurga