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Page : 1310 pages
File Size : 48,68 MB
Release : 1928
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Page : 1310 pages
File Size : 48,68 MB
Release : 1928
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Page : 626 pages
File Size : 22,24 MB
Release : 1817
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Page : 618 pages
File Size : 24,70 MB
Release : 1928
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Page : 1044 pages
File Size : 11,37 MB
Release : 1928
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Author : Inderjit
Publisher : Springer Science & Business Media
Page : 550 pages
File Size : 37,73 MB
Release : 2013-11-11
Category : Science
ISBN : 9401705526
Weeds hold an enigmatic and sometimes-controversial place in agriculture, where they are generally reviled, grudgingly tolerated, and occasionally admired. In most cases, growers make considerable effort to reduce the negative economic impact of weeds because they compete with crops for resources and hinder field operations, thereby affecting crop productivity and quality, and ultimately the sustainability of agriculture. Weed control in production agriculture is commonly achieved through the integration of chemical, biological, and mechanical management methods. Chemicals (herbicides) usually inhibit the growth and establishment of weed plants by interfering with various physiological and biochemical pathways. Biological methods include crop competition, smother crops, rotation crops, and allelopathy, as well as specific insect predators and plant pathogens. Mechanical methods encompass an array of tools from short handled hoes to sophisticated video-guided robotic machines. Integrating these technologies, in order to relieve the negative impacts of weeds on crop production in a way that allows growers to optimize profits and preserve human health and the environment, is the science of weed management.
Author : Alfred Bate Richards
Publisher :
Page : 146 pages
File Size : 37,26 MB
Release : 1847
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Author : Maureen Donnelly
Publisher : IOS Press
Page : 368 pages
File Size : 46,72 MB
Release : 2012
Category : Computers
ISBN : 1614990832
The complex information systems which have evolved in recent decades rely on robust and coherent representations in order to function. Such representations and associated reasoning techniques constitute the modern discipline of formal ontology, which is now applied to fields such as artificial intelligence, computational linguistics, bioinformatics, GIS, conceptual modeling, knowledge engineering, information retrieval, and the semantic web. Ontologies are increasingly employed in a number of complex real-world application domains. For instance, in biology and medicine, more and more principle-based ontologies are being developed for the description of biological and biomedical phenomena. To be effective, such ontologies must work well together, and as they become more widely used, achieving coordinated development presents a significant challenge. This book presents collected articles from the 7th International Conference on Formal Ontologies (FOIS), held in Graz, Austria, in July 2012.FOIS is a forum which brings together representatives of all major communities involved in the development and application of ontologies to explore both theoretical issues and concrete applications in the field. The book is organized in eight sections, each of which deals with the ontological aspects of: bioinformatics; physical entities; artifacts and human resources; ontology evaluation; language and social relations; time and events; representation and the methodological aspects of ontological engineering. Providing a current overview of developments in formal ontology, this book will be of interest to all those whose work involves the application of ontologies, and to anybody wishing to keep abreast of advances in the field.
Author : Conn Iggulden
Publisher : Bantam
Page : 1732 pages
File Size : 14,68 MB
Release : 2012-04-23
Category : Fiction
ISBN : 0345538463
From the co-author of The Dangerous Book for Boys, the Khan series is a triumph of historical fiction—a bold, epic account bursting with gritty realism and exhilarating action. Now this eBook bundle assembles the entire series—Birth of an Empire, Lords of the Bow, Bones of the Hills, Empire of Silver, and Conqueror—sparing no detail, from the Great Khan’s first conquest and the heights of his unprecedented empire, to his brutal ancestral legacy and the rise of Kublai Khan. GENGHIS: BIRTH OF AN EMPIRE “Invigorating . . . zesty historical fiction, the kind with plenty of unbridled combat, accurate research, rampaging hordes and believable characters.”—USA Today Genghis Khan was born Temujin, the son of a khan, raised in a clan of hunters and driven by a singular fury: to survive in the face of death, to kill before being killed. Through a series of courageous raids, Temujin’s legend grew until he was chasing a vision: to unite many tribes into one, to make the earth tremble under the hoofbeats of a thousand warhorses, to subject all nations and empires to his will. GENGHIS: LORDS OF THE BOW “Readers who enjoy well-researched tales of historical adventure with an emphasis on political intrigue, exotic settings, and military conflict will enjoy the ride.”—Library Journal For centuries, primitive tribes have warred with one another. Now, under Genghis Khan, they have united as one nation to face the ultimate test: the great, slumbering walled empire of the Chin. In Yenking—modern-day Beijing—the Chin will make their final stand. But Genghis will strike with breathtaking audacity, never ceasing until the emperor himself is forced to kneel. GENGHIS: BONES OF THE HILLS “Page-turning . . . a sweeping historical saga [that] will appeal to fans of gritty combat fiction.”—Booklist As Genghis enters a strange new land of towering mountains and arid desert, he stirs an enemy greater than any he has met before. Shah Ala-ud-Din Mohammed has under his command thousands of fierce Arab warriors, teeming cavalry, and terrifying armored elephants. But another battle is taking shape—between two of Genghis’s feuding sons. Soon the most powerful man in the world must choose a successor, touching off the most bitter conflict of all. KHAN: EMPIRE OF SILVER “Epic . . . alpha-male fiction . . . The book has much to teach about a time and a people long shrouded in legend.”—The Wall Street Journal The Great Khan is dead—and his vast empire, forged through raw courage, tactical brilliance, and indomitable force, hangs in the balance. Even as the sons of Genghis Khan maneuver for supremacy, the Khan’s armies extend his reach farther than ever before, into southern China and across the rugged mountains of Russia to the vulnerable heart of Europe, where the most courageous warriors the West commands await the coming onslaught. CONQUEROR “A rip-roarin’ read, and inspiration to go and sack a few cities on your own.”—Kirkus Reviews A succession of ruthless leaders have seized power in the wake of the Great Khan’s death—all descendants of Genghis, but none with his indomitable character. It is Kublai—refined and scholarly, always considered too thoughtful to take power—who will devise new ways of warfare and conquest as he builds the dream city of Xanadu. His gifts will serve him well when an epic civil war breaks out among brothers, the outcome of which will literally change the world.
Author : United States. Agricultural Research Service
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Page : 452 pages
File Size : 13,57 MB
Release : 1955
Category : Agricultural pests
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Page : 966 pages
File Size : 11,61 MB
Release : 1843
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