plant production and management under drought conditions developments in agricultural and managed forest ecology

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Plant Production And Management Under Drought Conditions

Author : J.F. Stone
ISBN : 9780444600042
Genre : Technology & Engineering
File Size : 22. 27 MB
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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 :
ISBN : 9781461389828
Genre : Science
File Size : 54. 38 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.

References No 12912 14765 Abd Zur

Author : J. Pospísilová
ISBN : 9789400948167
Genre : Science
File Size : 62. 11 MB
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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.

Nitrogen Management And Ground Water Protection

Author : Ronald F Follett
ISBN : 9780444599391
Genre : Technology & Engineering
File Size : 47. 82 MB
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Supplying crops with adequate nitrogen is vital to ensuring food supplies. Once nitrogen is added to the soil, it is subject to chemical transformations of the nitrogen-cycle including transformation to nitrate. Excessive amounts of accumulated nitrate may then leach out of the soil and could potentially enter and contaminate drinking water supplies. The purpose of this book is to examine the subject of nitrogen management and ground water protection. The issue of maintaining ground water quality is addressed primarily from an agronomic point of view. Topics covered include: health and economic aspects of nitrate in drinking water; nitrate sources; ground water nitrate in the USA and other developed countries; transport, leaching and accounting for nitrogen; soil, nitrogen, crop and water management; and nitrate in aquifer systems. The book contains a keyword index and is organized into thirteen chapters, each with appropriate references, tables and figures. Chapter authors are among the leading experts on the subject of nitrate and ground water quality. Readers to whom the book is directed include soil scientists and agronomists, agricultural engineers (irrigation and drainage), environmental scientists, agricultural policy makers, and hydrologists.

Humus Its Structure And Role In Agriculture And Environment

Author : J. Kubát
ISBN : 9780444599599
Genre : Technology & Engineering
File Size : 28. 22 MB
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This volume presents the proceedings of the 10th international symposium Humus et Planta held in Prague in August 19-23, 1991. The main topics of this book are devoted to the recent advances in fundamental, as well as applied research of humic substances, the most abundant of the naturally occuring macromolecules of nature, the understanding of their nature and how they react and interact in their natural environments. Texts are included on the structure, physical and chemical properties of humic substances; the relationships among humus, soil properties and fertility; the biotransformations of organic substances in the soil; the relationships between humic substances and plants and the interactions of humus and xenobiotic substances. This book presents recent knowledge of the complicated and challenging humic substances. It will be of interest not only to scientist, but also to University teachers and students of agricultural and environmental sciences.

Research And Development In Agriculture

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ISBN : CORNELL:31924000828099
Genre : Agriculture
File Size : 49. 64 MB
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Angewandte Botanik

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ISBN : UOM:39015046255439
Genre : Botany
File Size : 59. 30 MB
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Drought In The Great Plains

Author : Donald A. Wilhite
ISBN : UCR:31210025778042
Genre : Droughts
File Size : 69. 69 MB
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Evapotranspiration From Plant Communities

Author : Munna L. Sharma
ISBN : 0444422501
Genre : Nature
File Size : 74. 42 MB
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Measurement and prediction of evaporation from forested and agricultural catchments. Measuring evapotranspiration by hydrological methods. Evapotranspiration from a Eucalyptus community. Determination of evapotranspiration of E. regnans forested cachments using hydrological measurements. Terminology and concepts in natural evaporation. The measurement of evaporation by meteorological methods. The uses and limitations of flux-gradient relationships in micrometeorology. Evapotranspiration - how good is the Bowen ratio method? Evaluation of evapotranspiration and canopy resistance: an alternative combination approach. Plant physiological methods for studying evapotranspiration: problems of telling the forest from the trees. Evapotranspiration of four major agricultural plant communities in the south-west of Western Australia measured with lage ventilated chambers. Modelling evapotranpiration: an approach to heterogeneous communities. Water use by isolated trees. A model of canopy drying. Using the Penman-Monteith equation predictively. Evapotranspiration and soil heterogeneity. Water balance under wheat modelled with limited soil data. The development and proving of models of large scale evapotranspiration: an Australian study.

Report Of Annual Corn And Sorghum Research Conference

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ISBN : WISC:89081978942
Genre : Corn
File Size : 44. 13 MB
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