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Plant Production And Management Under Drought Conditions

Author: J.F. Stone
Publisher: Elsevier
ISBN: 0444600043
Size: 16.35 MB
Format: PDF
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For some years, workers have been investigating the possibilities of integrating knowledge from soil and atmospheric sciences, crop physiology, and genetics in order to model crop response to water stress and breed plants for drought resistance. This book turns the theory into practice. Information, gathered from recent symposia and research journals, have been built upon by the authors. Up-to-date practices are cited, new practices devised, and approaches for scientific applications specified. The authors have devised numerous examples and applications for their approaches. Attention has been given to making these approaches credible in the light of economic and energy limitations. Because application of such practice over a wide area requires wide-areal sensing and measurement, recent advances in remote sensing for these purposes are outlined with methodology for practical application. The book will be of interest to a wide readership including crop managers and producers, soil scientists, agricultural micrometeorologists, plant breeders, water managers and stress physiologists.

Advances In Soil Science

Author:
Publisher: Springer Science & Business Media
ISBN: 1461389828
Size: 65.80 MB
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From the beginning of agriculture until about 1950, increased food production came almost entirely from expanding the cropland base. Since 1950, however, the yield per unit of land area for major crops has increased dramatically. Much of the increase in yields was because of increased inputs of energy. Between 1950 and 1985, the farm tractor fleet quadrupled, world irrigated area tripled, and use of fertilizer increased ninefold. Between 1950 and 1985, the total energy used in world agriculture increased 6. 9 times. Irrigation played a particularly important role in the rapid increase in food production between 1950 and 1985. The world's irrigated land in 1950 totaled 94 million hectares but increased to 140 million by 1960, to 198 million by 1970, and to 271 million hectares in 1985. However, the current rate of expansion has slowed to less than 1 % per year. The world population continues to increase and agricultural production by the year 2000 will have to be 50 to 60% greater than in 1980 to meet demands. This continued demand for food and fiber, coupled with the sharp decline in the growth rate of irrigation development, means that much of the additional agricultural production in future years must come from cultivated land that is not irrigated. Agricultural production will be expanded in the arid and semiarid regions because these regions make up vast areas in developing countries where populations are rapidly rising.

Evapotranspiration From Plant Communities

Author: M.L. Sharma
Publisher: Elsevier
ISBN: 0444600019
Size: 12.15 MB
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A change in land use has been found to alter the components of the hydrological cycle through its effects on evapotranspiration. This influences planning and management of water resources. The Workshop, from which this volume was derived, was organized in this context to discuss processes and techniques relevant to estimating evapotranspiration of communities ranging from agricultural to forested lands. Its objectives were to provide a forum for exchange of ideas, to gather up-to-date information on the state of the art, and to identify priority areas for future research. The eighteen papers in this volume have been selected from those presented at the Workshop on the basis of technical quality and subject matter coverage and result in a valuable contribution to our current understanding of evapotranspiration.

References No 12912 14765 Abd Zur

Author: J. Pospísilová
Publisher: Springer Science & Business Media
ISBN: 9400948166
Size: 31.87 MB
Format: PDF
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The tenth volume of Water-in-Plants Bibl iography includes papers in al I fields of plant water relations research which appeared during the year 1984 - from theoreti cal considerations about the state of water in cel Is and its membrane transport to drought resistance of plants or physiological significance of irrigation. In addition to papers devoted entirely to plant water relations, papers on other topics are in cluded if they contain data on plant hydration level, water vapour efflux, rate of water uptake or water transport, etc., or if they contain valuable methodological in formation (measurement of selected microclimatic factors, soi I moisture etc.). We have tried to cover fully the relevant papers which have been publ ished in important scientific periodicals and books. Articles appeared in local journals, mimeographed booklets, abstracts of thesis and of symposia contributions, etc., were chosen mostly from reprints received directly from authors. The courtesy of those is highly appreciated. The manuscript is usually prepared in May and June of the year fol lowing the year which it covers. Unfortunately some reprints come later and thus the respective references appear in the fol lowing volume, with one year delay. To maximize the value of the bibl iography the references are arranged alphabetic ally according to the authors' names, and each volume is provided with three indexes.

Water Relations Of Plants And Soils

Author: Paul J. Kramer
Publisher: Academic Press
ISBN: 0080924115
Size: 65.72 MB
Format: PDF, ePub
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Water Relations of Plants and Soils, successor to the seminal 1983 book by Paul Kramer, covers the entire field of water relations using current concepts and consistent terminology. Emphasis is on the interdependence of processes, including rate of water absorption, rate of transpiration, resistance to water flow into roots, soil factors affecting water availability. New trends in the field, such as the consideration of roots (rather than leaves) as the primary sensors of water stress, are examined in detail. Key Features * Addresses the role of water in the whole range of plant activities * Describes molecular mechanisms of water action in the context of whole plants * Synthesizes recent scientific findings * Relates current concepts to agriculture and ecology * Provides a summary of methods