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Author :
Publisher :
ISBN 13 :
Total Pages : 576 pages
Book Rating : 4.P/5 (18 download)
Download or read book A.I.D. Research and Development Abstracts written by and published by . This book was released on 1973 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : International Rice Research Institute
Publisher : Int. Rice Res. Inst.
ISBN 13 : 9711040131
Total Pages : 262 pages
Book Rating : 4.7/5 (11 download)
Download or read book Major Research in Upland Rice written by International Rice Research Institute and published by Int. Rice Res. Inst.. This book was released on 1975 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Upland rice around the world. Climate of upland rice regions. Soils on which upland rice is grown. Growth-limiting factors of aerobic soils. Factors that limit the growth and yields of upland rice. Varietal diversity and morpho-agronomic characteristics of upland rice. Agronomic traits needed in upland rice varieties. Drought tolerance in upland rice. Control of upland rice insects though varietal resistance. Diseases of upland rice and their control though varietal resistance. Varietal resistance to adverse chemical environments of upland rice soils. Breeding methods for upland rice. Cultural practices for upland rice. Studies on insect pests of upland rice. Pesticide residue in upland rice soil. Mineral microbial transformations in upland rice soil.Future emphasis on upland rice.
Author : Pedro A. Sanchez
Publisher : Cambridge University Press
ISBN 13 : 1107176050
Total Pages : 685 pages
Book Rating : 4.1/5 (71 download)
Download or read book Properties and Management of Soils in the Tropics written by Pedro A. Sanchez and published by Cambridge University Press. This book was released on 2019-01-10 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
Author : Surajit K. De Datta
Publisher : Int. Rice Res. Inst.
ISBN 13 : 0471097608
Total Pages : 642 pages
Book Rating : 4.4/5 (71 download)
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:
Author : J. Dobereiner
Publisher : Springer Science & Business Media
ISBN 13 : 1461589576
Total Pages : 400 pages
Book Rating : 4.4/5 (615 download)
Download or read book Limitations and Potentials for Biological Nitrogen Fixation in the Tropics written by J. Dobereiner and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 15th Latin American Symposium ''laS held in Brasilia (FD) on J1UY 18-22, 1977, on a topic of great interest for agriculture, especially in the tropics. Many new developments have taken place in the field of research in N2 fixation during the last few years. They "Tere made possible by the improved methods of measuring of nitrogenase activity, progress in genetic engineering fields and the increased interest in taking advantage of natural sources for biological nitrogen fixation. The approach used in this Symposium together with the one held four months earlier in Brookhaven on ;'Genetic Engineering for Nitrogen Fixation" gives an interesting picture of the present status of nitrogen fixation from two diverse approaches. This is my 20th year visiting Latin i'-J11.erica. I am most impressed with the tremendous development which has taken place during these years in Latin American science. I want to congrat ulate our Brazilian colleagues for arranging this excellent and timely symposium and its excellent organization. These symposia are a cooperative effort between our Latin colleagues and scientists allover the world. They are made possible by excellent local support and support by a number of international agencies and several groups in the United States. Earlier symposia in this series are listed on pp. viii-x. Alexander Hollaender vii viii PREFACE I. International Symposium on Tissue Transplantation--Santiago, Vifia del Mar, and Valparaiso, Chile. Published in 1962 by the University of Chile Press, Santiago; edited by A. P. Cristoffanini and Gustavo Hoecker; 269 pp.
Author :
Publisher : Int. Rice Res. Inst.
ISBN 13 : 9712202240
Total Pages : 477 pages
Book Rating : 4.7/5 (122 download)
Download or read book Priorities for Alleviating Soil-related Constraints to Food Production in the Tropics written by and published by Int. Rice Res. Inst.. This book was released on 1980 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : University Consortium on Soils of the Tropics
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.7/5 (367 download)
Download or read book Annual Report of the University Consortium on Soils of the Tropics written by University Consortium on Soils of the Tropics and published by . This book was released on 1973 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Phool Chand Gupta
Publisher : Int. Rice Res. Inst.
ISBN 13 : 9711041723
Total Pages : 376 pages
Book Rating : 4.7/5 (11 download)
Download or read book Upland Rice written by Phool Chand Gupta and published by Int. Rice Res. Inst.. This book was released on 1986 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Upland rice distribution; Climate; Landscape and soils; Cropping systems; Varietal improvement; Soil management; Land preparation and crop establishment; Farm equipment; Weed management; Disease management; Insect pest management; Economics of upland rice production.
Author : James Miller Wolf
Publisher :
ISBN 13 :
Total Pages : 452 pages
Book Rating : 4.E/5 ( download)
Download or read book Water Constraints to Corn Production in Central Brazil written by James Miller Wolf and published by . This book was released on 1975 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Kate Barger Showers
Publisher :
ISBN 13 :
Total Pages : 210 pages
Book Rating : 4.E/5 ( download)
Download or read book Assessment of the Nitrogen Mineralization Potential of a Brazilian Oxisol written by Kate Barger Showers and published by . This book was released on 1977 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topsoil and subsoil samples were collected from the check (0 nitrogen added) plots of a nitrogen fertilizer experiment with maize located on a Oxisol in the Central Plateau of Brazil on land witch had been recently brougth into cultivation. The samples were evaluated for their potential to supply nitrogen to a crop by a standard incubation thechinique and by a chemical procedure whichi had shown some promise as a predictive tool for ather tropical soils. The results were compared with nitrogen uptake data available for a maize crop grown on these soils. A long term incubation study was also conducted in order to characterize the nitrogen release pattern of these soils. Al samples were extracted with 1 N KC1. The chemical test procedure, wich measure a fraction of the extractable organic and inorganic NH+4 involved the digestion of extracts with concentrated H2SO4 and analysis for NH+4 by stem distillation. Extracts from incubated and nonincubated soil were also analysed for mineral nitrogen by stem distillation. Difficulties were encountered in the analysis anlysis of these drak red Oxisols by the macro-Kjeldahl procedure. The number of samples was insufficient for a satisfactory interpretation of the correlations between the chemical soil test and crop nitrogen uptake data. The only strong relationship in the soil test data was that between Dmineralizable nitrogen and digest nitrogen. This would lend some support to the hypothesis that the digest nitron does measure some portion of the soil nitrogen which is potentially available to plants. The incubation studies showed a dofference between topsoils and subsoils in their patterns of release of NH+4 and NO-3; the topsoils showed rapid increases in the amounts of NO-3 and rapid decreases in NH+4 and decrease in NO-3. The values of Dmineralizable nitrogen from this study were similar to those report in the literature from incubation studies of soils with similar chemical properties from temperate and tropical regions. It can not be conclued that these Oxisols from the central Plateau of Brazil have the same potential for nitrogen production as temperate region soils, for the cropping historis of the various temperate and tropical aoils were different.
Author : Dale Eugene Bandy
Publisher :
ISBN 13 :
Total Pages : 532 pages
Book Rating : 4.E/5 ( download)
Download or read book Soil-plant-water Relationships as Influenced by Various Soil and Plant Management Practices on Campo Cerrado Soils in the Central Plateau of Brazil written by Dale Eugene Bandy and published by . This book was released on 1976 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Short term drought periods during the rainy season, low soil water storage capacity, and highly acidic soils 80% Al sat. which inhibit root growth all give a combined effect of limiting yields for most crops in the Central Cerrado of Brazil. With those problems in mind, experiments were conducted in Brazil for two years to study the effect of a veranico (drought) on corn (Zea mays L.) growth and yield. The experiment were designed to provide a drought avoidance for the corn plant. In one experiment, soil management techniques were used to allow a crop to tap a greater quantity of the soil water stored in the soil. A second experiment used crop management techniques to increase water use efficiency by decreasing water loss from the soil surface and from the cornleaf. The soil management experiment consistent basically of lime rates and depths of line incorporation, i.e. 0-lime, 8T/ha lime incorporated to a 15 cm depth and 8T/ha lime incorporated to a 30 cm depth, and a broadcast verses banding application of phosphorus. Without plant water stress, no depth of lime effect was noted on plant growth before the tasseling stage. From silking to grain maturity, the deep limed plants maintained a longer period of active plant growth by delaying leaf senescence. The unlimed corn plants were always inferior to the limed plants with the dry-cool season crop showing a more pronunced decrease in plant growth. Measurements taken during an actual veranico or a simulated veranico showed that deep liming had a large effect (...).
Author : Food and Agriculture Organization of the United Nations
Publisher :
ISBN 13 :
Total Pages : 1086 pages
Book Rating : 4.:/5 (8 download)
Download or read book FAO Library List of Recent Accessions written by Food and Agriculture Organization of the United Nations and published by . This book was released on 1971 with total page 1086 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jan Pruntel
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.E/5 ( download)
Download or read book Water Availability and Soil Suitability for Irrigation Water Impoundments in the Federal District of Brazil written by Jan Pruntel and published by . This book was released on 1975 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estudos realizados durante um ano de precipitacao pluviometrica media demonstraram que um terco dessa precipitacao encaminha-se para a percolacao profunda. Esta agua e gradualmente liberada do reservatorio subterraneo e subsequentemente descarregada pelos rios e riachos, que sao as fontes mais importantes para irrigacao. A qualidade dessa agua para irrigacao e excelente. Durante a estacao chuvosa dispoe-se de abundantes quantidades de agua para irrigacao. As descargas minimas dos rios sao de 5 litros/seg por km2, no fim da estacao seca. Se fossem construidas instalacoes que servissem de reservatorio, esse volume poderia ser dobrado o que, talvez, permitisse a irrigacao de 5 a 10% do Distrito Federal. A agua subterranea poderia transformar-se em importante fonte de agua para irrigacao, principalmente em locais elevados. Ha nascentes que dispoem de agua para emprego imediato, principalmente, para irrigacao de areas de menor extensao. Ensaios de engenharia mostram alta infiltracao inicial e propriedades de permeabilidade dos solos que podem ser reduzidas por meio de compactacao em condicoes favoraveis de umidade.
Author :
Publisher :
ISBN 13 :
Total Pages : 134 pages
Book Rating : 4.4/5 (294 download)
Download or read book Transactions written by and published by . This book was released on 1982 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Great Britain. Foreign and Commonwealth Office. Library
Publisher :
ISBN 13 :
Total Pages : 570 pages
Book Rating : 4.3/5 (91 download)
Download or read book Foreign and Commonwealth Office, Accessions to the Library, May 1971-June 1977: Classified catalogue written by Great Britain. Foreign and Commonwealth Office. Library and published by . This book was released on 1979 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Great Britain. Foreign and Commonwealth Office. Library
Publisher : G. K. Hall
ISBN 13 :
Total Pages : 576 pages
Book Rating : 4.3/5 (91 download)
Download or read book Foreign and Commonwealth Office, Accessions to the Library, May 1971-June 1977: Author catalogue written by Great Britain. Foreign and Commonwealth Office. Library and published by G. K. Hall. This book was released on 1979 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 776 pages
Book Rating : 4.2/5 (378 download)
Download or read book Ciência e cultura written by and published by . This book was released on 1976 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
