Download or read book The Mechanical Stability of Clay Soils as Influenced by the Moisture Conditions and Some Other Factors written by F. F. R. Koenigs and published by . This book was released on 1961 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of Symposium on Paddy Soils written by Institute of Soil Science, Academia Sinica and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 876 pages. Available in PDF, EPUB and Kindle. Book excerpt: China contributes a large part to rice production, one of the most important crops in the world. It is estimated that in China rice constitutes about half of the total food production, covering an area of about 30 % of \08 hectares of cultivated land of the whole country. Owing to the peculiar water regime, paddy soils possess quite different properties physically, chemically and biologically as compared with those of upland soils. Such properties have a conspicuous effect on fertility and management practice of paddy field. For the purpose of summing up the past work and opening up new prospects, a "Symposium on Paddy Soils" was organized under the auspices of Academia Sinica, held on October 19-24, 1980 in Nanjing, which was followed by a seven-day paddy soil excursion in the lower Changjiang Delta. In addition to 120 Chinese soil scientists, 56 guests coming from America, Asia, Europe and Oceania attended the symposium on invitation. A total of 110 papers were presented either orally or by poster. All these are collected and published in the present proceedings which we hope may be helpful to the scientific exchanges between soil scientists of China and other countries.
Download or read book Clay Dispersion as Influenced by Chemical Environment and Mineralogical Properties written by Harpal Singh Arora and published by . This book was released on 1969 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Matter and Rice written by and published by Int. Rice Res. Inst.. This book was released on 1984 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles and Practices of Rice Production written by Surajit K. De Datta and published by Int. Rice Res. Inst.. This book was released on 1981 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Workshop on the Management of Low Fertility Acid Soils of the American Humid Tropics written by J. F. Wienk and published by IICA. This book was released on with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Report Corps of Engineers U S Army Cold Regions Research and Engineering Laboratory written by Cold Regions Research and Engineering Laboratory (U.S.) and published by . This book was released on 1966 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Management of Low Fertility Acid Soils of the American Humid Tropics written by and published by Bib. Orton IICA / CATIE. This book was released on with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Soil Science written by Ward Chesworth and published by Springer Science & Business Media. This book was released on 2007-11-22 with total page 859 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Soil Science provides a comprehensive, alphabetical treatment of basic soil science in a single volume. It constitutes a wide ranging and authorative collection of some 160 academic articles covering the salient aspects of soil physics, chemistry, biology, fertility, technology, genesis, morphology, classification and geomorphology. With increased usage of soil for world food production, building materials, and waste repositories, demand has grown for a better global understanding of soil and its processes. longer articles by leading authorities from around the world are supplemented by some 430 definitions of common terms in soil sciences.
Download or read book Amount and Type of Clay and Pore Fluid Influences on the Critical Shear Stress and Swelling of Cohesive Soils written by Amin Alizadeh and published by . This book was released on 1974 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Desertification Land Degradation and Sustainability written by Anton Imeson and published by John Wiley & Sons. This book was released on 2012-01-25 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Desertification offers a comprehensive overview of the subject and clearly emphasizes the link between local and global desertification processes and how past and current policy has affected arid environments and their populations. This text adequately applies the research undertaken during the last 15 years on the topic. Desertification has become increasingly politicized and there is a need to present and explain the facts from a global perspective. This book tackles the issues surrounding desertification in a number of ways from differing scales (local to global), processes (physical to human), the relationship of desertification to current global development and management responses at different scales. Desertification has been mainstreamed and integrated into other areas of concern and has consequently been ignored as a cross cutting issue. The book redresses this balance. Making use of much original data and information that has been undertaken by many scientists andpractitioners during the last decade in different parts of the world, Desertification, Land Degradation and Sustainability is organised according to the principles of adaptive management and hierarchy theory and clearly explains desertification within a framework of evolving and interacting physical and socio-economic systems. In addition to research data the book also draws from the National Action Plans of different countries, the IPCC Fourth Assessment on Climate Change and the Millennium assessments. Clearly structured throughout, the content of the book is organised at different scales; local, regional and global. It also specifically explains processes linking top-down and bottom- up interactions and has a strong human component. The historical, cultural and physical context is also stressed. Clearly organised into the following distinct sections: a) Concepts and processes b) Data c) Impacts d) Responses e) Case studies. This text is essential for anyone studying desertification as part of an earth and environmental science degree.
Download or read book Agricultural Soil Mechanics written by A. J. Koolen and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compared with forces occurring in soil mechanics problems in civil engineering, the forces that are applied to soil in farming operations generally have a short duration, less than a few seconds, a small loaded area, no more than a few square decimeters, and small intensities, 10 bar being a high value. On the other hand, soil properties vary widely between those of a weak mud and a stone-like dry soil. Tillage and related applications of force to soil are practiced worldwide in farming. Tillage operations are performed on one hectare of land for every three human beings. This means that for the food production for each individual daily, something like one cubic meter of soil is stirred, or about 20 times his body weight. Theoretical knowledge of this most common human activity, which largely determines the surface shape of the fertile part of the earth, is still very limited. In this book the authors have tried to give an outline of the present state of the art. One of the starting points was a course in soil dynamics taught by the authors at the Agricultural University at Wageningen, The Netherlands. We hope to reach interested readers who have no more theoretical knowledge than high school level, as well as readers who want to go beyond the level of a third year university student. For the chapter on wheels and tires we received substantial support from F. G. J. Tijink of the Tillage Laboratory at Wageningen.
Download or read book An Introduction to Clay Colloid Chemistry written by H. Van Olphen and published by . This book was released on 1977-05-12 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clay suspensions and coloidal systems in general. Properties of hydrophobic sols. The theory of the stability of hydrophobic sols. Succees of the theory of stability further theories and refinements. Clay mineralogy. Praticle size and shape, surfaca area, and density of charge. Electric double-layer structure and stability of clay suspensions. Peptization of clay suspensions. Technological applications of stability contorl, sedimentation, filtration, and flow behavior. Interlamellar and osmotic swelling application. Interaction of clays and organic compounds. Electrokinetic and electrochemical properties of clay water systems. Note on the preparation of clay suspensions. Electric double-layer computation. Miscellaneous computer data for montmorillonites. Van der waals attraction energy between two layers.
Download or read book Swedish Journal of Agricultural Research written by and published by . This book was released on 1971 with total page 1026 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Netherlands Journal of Agricultural Science written by and published by . This book was released on 1961 with total page 1022 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by Soil Science Society of America and published by . This book was released on 1974 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts of the Agricultural University Wageningen The Netherlands 1918 1968 written by and published by . This book was released on 1968 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
