Download or read book Atlas of Weed Mapping written by Hansjoerg Kraehmer and published by John Wiley & Sons. This book was released on 2016-03-17 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Weeds are variously defined as plants growing where they are not wanted, plants that interfere with human activity. Weeds affect everyone in the world by reducing crop yield and quality, delaying or interfering with harvesting, interfering with animal feeding, reducing animal health, preventing water flow, as plant parasites, etc. It is estimated that those problems cause $ billions worth of crop losses annually and the global cost of controlling weeds also runs into many $ billions every year. Atlas of Weed Mapping presents an introductory overview on the occurrence of the most common weeds of the world. The book notably includes: Description of cropping practices and explanations for the global distribution of weeds Invasive plant mapping Aquatics and wetland plants with histological plant details Theoretical and practical aspects of weed mapping Aspects on the documentation of herbicide resistance Biodiversity, rare weeds and the dominance of the most common weeds Fully illustrated with more than 800 coloured figures and a number of tables, this new characterisation of anthropogenic vegetation will be interesting for readers of a great number of disciplines such as agriculture, botany, ecology, geobotany and plant community research. More than a hundred experts have contributed data to this unique compilation.
Download or read book Weed Mapping and Weed Scouting written by David Wayne Krueger and published by . This book was released on 1996 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing a Technique for Evaluating Weed specific Mapping Systems written by and published by . This book was released on 2007 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Federal regulation and public awareness of agricultural chemical use have fueled precision agriculture research for the last decade. An extensive body of research on potential reduction of herbicide inputs by automated patch-spraying or site-specific management has developed. Two dominant methods have developed for site-specific application of herbicide. Map-based systems use predefined application maps to direct herbicide application and sensor-based systems use real-time weed sensors to identify and treat weeds as the sprayer moves through the field. Weed maps, generated for map-based application of herbicide are beneficial for out-of-field decision-making but are labor intensive to create and sensitive to many types of sampling errors. Real-time sensor-based systems are not as labor-intensive but have historically made no record of what parts of the field received herbicide and are subject to weed discrimination errors. The University of Tennessee Weed Mapping System (UTWMS) is made up of a digital event recorder and a WeedSeeker discrete herbicide application system. The overarching objective of this study was to evaluate the UTWMS under field conditions. Specific objectives included the use of georeferenced manually-sampled plots for evaluation of map accuracy; development of an automated documentation system for quantifying hits, misses, and false triggers of a real-time sensor-based spraying system; updating the logging software of the UTWMS to include a count of spray transitions; and investigate potentials for reducing number of sensors to reflect the existing spatial correlation of weeds. Manually sampled subplots at one-meter resolution did not correlate with weed maps and only weakly correlated when averaged by plot (8x30m). A video documentation system was successfully developed for evaluating discrimination accuracy of sensor-based sprayers. While investigating sensor resolution reduction to reflect spatial correlation of weeds, a sensor was replaced with a conditionally triggered solenoid valve during a simulation. More than 75% of the simulated weeds were accurately sprayed for all four conditional scenarios tested. A software modification to the UTWMS provided enumeration of spray transitions for weed scientist to investigate weed distribution during "percent time on" integration. The update rate of the GPS unit in the UTWMS should be increased if weed maps are to be representative of small research subplots.
Download or read book A Geographical Atlas of World Weeds written by LeRoy Holm and published by John Wiley & Sons. This book was released on 1980 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: World weeds and their geographical distribution.
Download or read book Vegetation mapping written by A.W. Küchler and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: A. W. KOCHLER The intimate intercourse between two or more 2. vegetation maps are scientific tools for ana fields of knowledge often bears interesting and lyzing the environment and the relation valuable fruit. Vegetation maps are such fruit, ships between vegetation and the site on resulting from the union of botany and geogra which it occurs. This helps to explain the phy. The work of botanists can be comprehen distribution of plant communities on the sive only if it includes a consideration of plants basis of the physical and chemical features in space, i. e. in different types of landscapes. At of the landscape. On the other hand, plant this point, the work of geographers becomes communities allow conclusions on the natu important through their development of maps re of the environment; as tools to determine and to analyze distribu 3. vegetation maps are valuable standards of tions in space. Our highly developed knowledge reference for observing and measuring of vegetation is matched by the refinement of changes in the vegetation, their direction cartographic techniques, and maps can now be and their speed, i. e. the rate of change. This is important because the character ofvegeta made that will show the extent and geographical distribution of vegetation anywhere on the sur tion is dynamic and is increasingly affected face of our planet with a remarkable degree of by man; accuracy. 4.
Download or read book A Geographical Atlas of World Weeds written by LeRoy G. Holm and published by . This book was released on 1991 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Colour Atlas of Weed Seedlings written by John B Williams and published by CRC Press. This book was released on 2020-04-15 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Early recognition and control of weeds invariably leads to considerable savings in the cost of herbicides used on crops and in gardens. This atlas is an indispensable full colour photographic guide to the 40 most common weeds afflicting arable farmland and gardens. The weeds have all been photographed at cotyledon and seedling stage to permit early
Download or read book Flora of Florida Dicotyledons Cabombaceae through Geraniaceae written by Richard P. Wunderlin and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: First of eight proposed volumes on the more than 3,800 vascular plants known to occur growing wild in the state.
Download or read book Aeromagnetic Map of the Weed 1 X 2 Sheet California written by California. Division of Mines & Geology and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Weed Mapping Workshop written by and published by . This book was released on 2000 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Map Turtle and Sawback Atlas written by Peter V. Lindeman and published by University of Oklahoma Press. This book was released on 2013-12-02 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering all facets of the biology of a little-known genus, Peter V. Lindeman’s lavishly illustrated Map Turtle and Sawback Atlas is both a scientific treatise and an engaging introduction to a striking group of turtles. Map turtles and sawbacks, found in and along rivers from Texas to Florida and north to the Great Lakes, fascinate ecologists and evolutionary biologists. Over a short geologic time span, these turtles achieved exceptional biological diversification. Their diets are also exceptionally diverse, and a significant difference in size distinguishes males from females. Adult males are typically half or less the shell length of adult females, making map turtles and sawbacks the champions of sexual dimorphism among not only turtles but all four-legged vertebrates. Aesthetics also draw biologists and hobbyists to map turtles and sawbacks. While the male Sabine map turtle may look to some like a “pencil-necked geek,” as the author puts it, markings on the shell, limbs, head, and neck make map turtles among the most attractive turtles on earth. Sawbacks feature a striking ridge down their shell. Few turtles show themselves off to such advantage. Photographs included here of Graptemys basking poses reveal to what improbable heights these turtles can scale, the spread-eagle sunning stances they adopt, the stacking of individuals on a crowded site, and the heads that warily watch the world above the waterline. In lively prose, Lindeman details the habitat, diet, reproduction and life history, natural history, and population abundance of each species. A section on conservation status summarizes official state, federal, and international designations for each species, along with efforts toward population management and recovery as well as habitat preservation. The author also outlines promising avenues for future research, ranging from the effects of global climate change on populations to strategies for combating expansion of the pet trade.
Download or read book An Electronic Atlas of Weeds and Invasive Species written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A List of Maps of America in the Library of Congress written by Library of Congress. Map Division and published by . This book was released on 1901 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A List of Maps of America in the Library of Congress written by Library of Congress. Division of Maps and Charts and published by . This book was released on 1901 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Map Thief written by Michael Blanding and published by Penguin. This book was released on 2015-06-02 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: The story of an infamous crime, a revered map dealer with an unsavory secret, and the ruthless subculture that consumed him Maps have long exerted a special fascination on viewers—both as beautiful works of art and as practical tools to navigate the world. But to those who collect them, the map trade can be a cutthroat business, inhabited by quirky and sometimes disreputable characters in search of a finite number of extremely rare objects. Once considered a respectable antiquarian map dealer, E. Forbes Smiley spent years doubling as a map thief —until he was finally arrested slipping maps out of books in the Yale University library. The Map Thief delves into the untold history of this fascinating high-stakes criminal and the inside story of the industry that consumed him. Acclaimed reporter Michael Blanding has interviewed all the key players in this stranger-than-fiction story, and shares the fascinating histories of maps that charted the New World, and how they went from being practical instruments to quirky heirlooms to highly coveted objects. Though pieces of the map theft story have been written before, Blanding is the first reporter to explore the story in full—and had the rare privilege of having access to Smiley himself after he’d gone silent in the wake of his crimes. Moreover, although Smiley swears he has admitted to all of the maps he stole, libraries claim he stole hundreds more—and offer intriguing clues to prove it. Now, through a series of exclusive interviews with Smiley and other key individuals, Blanding teases out an astonishing tale of destruction and redemption. The Map Thief interweaves Smiley’s escapades with the stories of the explorers and mapmakers he knew better than anyone. Tracking a series of thefts as brazen as the art heists in Provenance and a subculture as obsessive as the oenophiles in The Billionaire’s Vinegar, Blanding has pieced together an unforgettable story of high-stakes crime.
Download or read book Weed Mapping Workshop written by and published by . This book was released on 2000 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mapping Guide written by and published by . This book was released on 2008 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: Weed mapping is important and needs to be categorized with treatment. The important information obtained when mapping weeds includes: types of weeds, direction of spread, rate of spread, soil composition, and water table depth.
