Download or read book Nitrogen Fixation by Legumes in Mediterranean Agriculture written by D. Beck and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a Workshop, ICARDA, Syria, April 14-17, 1986.

Download or read book Gaseous Loss of Nitrogen from Plant Soil Systems written by J.R. Freney and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: A growing interest has been shown recently in the dymanics of nitrogen in agricultural and natural ecosystems. This has been caused by increasing demands for food and fibre by a rapidly expanding world population, and by a growing concern that increased land clearing, cultivation and use of both fertilizer and biologically fixed nitrogen can have detrimental effects on the environment. These include effects on water quality, eutrophication of surface waters and changes in atmospheric composition all caused by increased cycling of nitrogenous compounds. The input and availability of nitrogen frequently affects the productivity of farming systems more than any other single management factor, but often the nitrogen is used inefficiently. Much of the fertilizer nitrogen applied to the soil is not utilised by the crop: it is lost either in solution form, by leaching of nitrate, or in gaseous forms as ammonia, nitrous oxide, nitric oxide or dinitrogen. The leached nitrate can contaminate rivers and ground waters, while the emitted ammonia can contaminate surface waters or combine with atmospheric sulfur dioxide to form aerosols which affect visibility, health and climate. There is also concern that increased evolution of nitrous oxide will deplete the protective ozone layer of the stratosphere. The possibility of a link between the intensity of agricultural use of nitrogen, nitrous oxide emissions and amounts of stratospheric ozone has focussed attention on these interactions.

Download or read book Methods of Soil Analysis Part 2 written by Peter J. Bottomley and published by John Wiley & Sons. This book was released on 2020-01-22 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the primary references on analytical methods in soil science, Part 2 of the Methods series will be useful to all biogeoscientists, especially those with an interest in microbiology or bioremediation.

Download or read book Soil Biochemistry written by E. A. Paul and published by CRC Press. This book was released on 1981-04-01 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemistry and turnover of naturally occurring resistant organic compounds in soil; In situ analysis of soil components of biological origin; Oxidate coupling of aromatic compounds by ensymes from soil microorganisms; Control of urea transformations in soils; Chemistry and distribution of amino sugars in soils and soil organisms; Biochemistry, ecology, and microbiology of petroleum components in soil; Biological nitrogen fixation; Denitrification; Heavy metals in soil biology and biochemistry; Microbial biomass in soil: measurement and turnover.

Download or read book Nuclear Techniques in Improving Pasture Management written by Joint FAO/IAEA Division of Isotope and Radiation Applications of Atomic Energy for Food and Agricultural Development and published by . This book was released on 1983 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Nitrogen Fixation for Sustainable Agriculture written by J.K. Ladha and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical fertilizers have had a significant impact on food production in the recent past, and are today an indispensable part of modern agriculture. On the other hand, the oil crisis of the 1970s and the current Middle East problems are constant reminders of the vulnerability of our fossil fuel dependent agriculture. There are vast areas of the developing world where N fertilizers are neither available nor affordable and, in most of these countries, balance of payment problems have resulted in the removal of N fertilizer subsidies. The external costs of environmental degradation and human health far exceed economic concerns. Input efficiency of N fertilizer is one of the lowest and, in turn, contributes substantially to environmental pollution. Nitrate in ground and surface waters and the threat to the stability of the ozone layer from gaseous oxides of nitrogen are major health and environmental concerns. The removal of large quantities of crop produce from the land also depletes soil of its native N reserves. Another concern is the decline in crop yields under continuous use of N fertilizers. These economic, environmental and production considerations dictate that biological alternatives which can augment, and in some cases replace, N fertilizers must be exploited. Long-term sustainability of agricultural systems must rely on the use and effective management of internal resources. The process of biological nitrogen fixation offers and economically attractive and ecologically sound means of reducing external nitrogen input and improving the quality and quantity of internal resources. In this book, we outline sustainability issues that dictate an increased use of biological nitrogen fixation and the constraints on its optimal use in agriculture.

Download or read book Plant Nutrition 1982 written by A. Scaife and published by C.A.B. International. This book was released on 1982 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physiological Plant Ecology III written by O. L. Lange and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 803 pages. Available in PDF, EPUB and Kindle. Book excerpt: O.L. LANGE, P.S. NOBEL, C.B. OSMOND, and H. ZIEGLER Growth, development and reproductive success of individual plants depend on the interaction, within tolerance limits, of the factors in the physical, chemical and biological environment. The first two volumes of this series addressed fea tures of the physical environment (Vol. 12A) and the special responses of land plants as they relate to water use and carbon dioxide assimilation (Vol. 12B). In this volume we consider specific aspects of the chemical and biological envi ronment, and whereas the previous volumes were primarily concerned with the atmospheric interactions, our emphasis here shifts very much to the soil. This complex medium for plant growth was briefly reviewed in Chapter 17, Volume 12A. Since it is difficult to determine the precise physical and chemical interactions in the soil, it is even more difficult to determine the important biological interactions among organisms. Nevertheless there is growing aware ness of the significance of these interactions and their effects on physiological processes in the individual plant.

Download or read book Nitrogen Fixation in Southern Forestry written by Sharon Haines and published by . This book was released on 1978 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Potentials of Forage Legumes in Farming Systems of Sub Saharan Africa written by International Livestock Centre for Africa and published by ILRI (aka ILCA and ILRAD). This book was released on 1986-01-01 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microbiology in Action written by W. G. Murrell and published by Wiley-Blackwell. This book was released on 1988-06-28 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecology of the root-nodule bacteria; Colonization of the Rhizosphere by root nodule bacteria; Infection of legumes by Rhizobium; Principles of inoculant strain selection, inoculant production and quality control; Survival of root-nodule bacteria on inoculated seed; Nitrogen-fixing symbioses with Australian native legumes; Constraints to biological nitrogen fixation in ley-farming systems designed; Bradyrhizobium of the non-legumes Parasponia; Legume root nodules: nitrogen fixation in agriculture in relation to their structure; Oxygen diffusion: critical factor in legume nodule functioning; MOlecular basis of symbiotic nitrogen fixation; Genetics in symbiotic nitrogen fixation of legumes; Host genetics in symbiotic nitrogen fixation by legumes; Some aspects ofnon-rhizobial diazotrophs: their past and their future; Nitrogen fixations in the sea; Ecology and management of the Rhizosphere microflora; Bacterial adhesion at apparentle inert surfaces; Microbial structure and fuction in relation to growth and physiology ; Microbial tolerance of diminished water activity; Microbiology of milk: reviem of growth of bacteria in milk and methods of assessment; Microbiology of meat; Bacterial spore: natures's ultimate survival package.

Download or read book Recent Advances in Biological Nitrogen Fixation written by Nanjappa Shamanna Subba Rao and published by Hodder Education. This book was released on 1980 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Symbiotic Nitrogen Fixation written by P. Graham and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past three decades there has been a large amount of research on biological nitrogen fixation, in part stimulated by increasing world prices of nitrogen-containing fertilizers and environmental concerns. In the last several years, research on plant--microbe interactions, and symbiotic and asymbiotic nitrogen fixation has become truly interdisciplinary in nature, stimulated to some degree by the use of modern genetic techniques. These methodologies have allowed us to make detailed analyses of plant and bacterial genes involved in symbiotic processes and to follow the growth and persistence of the root-nodule bacteria and free-living nitrogen-fixing bacteria in soils. Through the efforts of a large number of researchers we now have a better understanding of the ecology of rhizobia, environmental parameters affecting the infection and nodulation process, the nature of specificity, the biochemistry of host plants and microsymbionts, and chemical signalling between symbiotic partners. This volume gives a summary of current research efforts and knowledge in the field of biological nitrogen fixation. Since the research field is diverse in nature, this book presents a collection of papers in the major research area of physiology and metabolism, genetics, evolution, taxonomy, ecology, and international programs.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1979 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Journal of Botany written by and published by . This book was released on 1985 with total page 880 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book SSSA Special Publication Series written by and published by . This book was released on 1967 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Journal of Microbiology written by and published by . This book was released on 1983 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: