Influencia Do Manejo Sobre A Agregacao Do Solo

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Influência do manejo sobre a agregação do solo

Author : W. J. Freire
Publisher :
ISBN 13 :
Total Pages : 59 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Influência do manejo sobre a agregação do solo by : W. J. Freire

Download or read book Influência do manejo sobre a agregação do solo written by W. J. Freire and published by . This book was released on 1972 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: Este trabalho foi desenvolvido com a finalidade de se pesquisar os efeitos que algumas praticas de manejo exercem sobre a estruturacao de um solo da Serie Luiz de Queiroz, medida atraves do indice de agregacao. Foi conduzido, em condicoes de campo, um experimento com quatro repeticoes, observando-se o delineamento 2x2x2x2 , cujos fatores experimentados forma: Materia Organica (com e sem), Adubacao (com e sem), Vegetacao (com e sem) e Preparao do Solo (Alto e Baixo Nivel). As amostras, colhidas do horizonte superdicial daquele solo, foram analisadas em laboratorio, comparando-se o efeito dos diversos tratamentos por meio do indice de agregacao, obtido pelo metodo do peneiramento em agua e expresso de acordo com a proposicao de YOUKER E McGUINNESS (1957). A analise estatistica dos dados obtidos permitiu que se tirassem algumas conclusoes importantes para o manejo do solo (...).

Advances in Agronomy

Author :
Publisher : Elsevier
ISBN 13 : 0080468918
Total Pages : 497 pages
Book Rating : 4.0/5 (84 download)

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Book Synopsis Advances in Agronomy by :

Download or read book Advances in Agronomy written by and published by Elsevier. This book was released on 2011-07-29 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 91 of Advances in Agronomy contains four indespensable reviews and over 30 descriptive figures. - Maintains the highest impact factor among serial publications in Agriculture - Presents timely reviews on important agronomy issues - Enjoys a long-standing reputation for excellence in the field

Física e manejo dos solos tropicais

Author : José Antonio Jorge
Publisher :
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Física e manejo dos solos tropicais by : José Antonio Jorge

Download or read book Física e manejo dos solos tropicais written by José Antonio Jorge and published by . This book was released on 1985 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: O solo: sua responsabilidade perante a Humanidade; Populacao versus alimento no mundo, Populacao versus alimento no Brasil; Problemas que afligem a agricultura brasileira; Textura do solo, Conceituacao; Fracoes do solo; Argila; Silte; Areia; Analise granulometrica; Classes texturais; Importancia pratica da textura do solo; Estrutura do solo; Classificacao de estrutura; Porosidade do solo; Estabilidade de agregados do solo; Aspectos praticos da estrutura; Nomenclatura: reticulado versus estrutura; A influencia dos cations na estrutura; Compactacao e subsolagem do solo; O processo de compactacao do solo; Problemas provenientes de compactacao dos solos; Beneficios da compactacao moderada dos solos; Tipos de adensamento; Sintomas caracteristicos de solos compactados ou adensados; Causas de compactacao do solo e maneiras de atenuar seus efeitos; Subsolagem; A agua no solo e na planta; Caracteristicas da agua; A agua no solo; Influencia da subsolagem e gradagem do solo na dinamica da agua no perfil: experimento; Resultados e discussao; Demonstracao do potencial hidrauLico no solo; Determinacoes laboratoriais das propriedades hidricas do solo; A influencia da textura, estrutura e mineralogia; A agua e as plantas; Histerese; Cor do solo; Determinacao da cor; Fatores que afetam a cor do solo; A temperatura do solo; Importancia do calor; Unidades termais; Propriedades termicas do solo; Comportamento termico do solo; Flutuacao estacional da temperatura e da difusidade termica do solo; A temperatura do solo e as plantas; Efeito da materia organica nas propridades fisicas do solo; A materia organica do solo; Dinamica da materia organica do solo; Efeitos da vinhaca no solo; Efeito do esterco nas propriedades fisicas do solo; Outros efeitos da materia organica do solo; Sistemas de cultivos dos solos agricolas; Manejo dos solos agricolas; Caracteristicas e problemas dos solos das regioes tropicais; Plantio direto versus preparo convencional.

Agrindex

Author :
Publisher :
ISBN 13 :
Total Pages : 864 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Agrindex by :

Download or read book Agrindex written by and published by . This book was released on 1994 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Conservation Agriculture

Author : Ram A. Jat
Publisher : CABI
ISBN 13 : 1780642598
Total Pages : 417 pages
Book Rating : 4.7/5 (86 download)

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Book Synopsis Conservation Agriculture by : Ram A. Jat

Download or read book Conservation Agriculture written by Ram A. Jat and published by CABI. This book was released on 2013-12-13 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers the spread of conservation agriculture (CA) to regions including Brazil, Argentina, Canada, Australia, Europe and emerging CA destinations in Asia and Africa. ÿTopics covered include the various components of CA, and how their individual and combined implementation influence productivity, soil health and environmental quality under diverse edaphic and climatic conditions. The book will be useful to teachers, researchers, extensionists, farmers, and students interested in environmental quality.

Influência de sistemas de manejo do solo sobre algumas propriedades físicas e químicas de um Podzolico Vermelho-Amarelo Cambico, fase terraco, e sobre a produção de milho (Zea mays L.).

Download Influência de sistemas de manejo do solo sobre algumas propriedades físicas e químicas de um Podzolico Vermelho-Amarelo Cambico, fase terraco, e sobre a produção de milho (Zea mays L.). PDF Online Free

Author : J. E. S. Bezerra
Publisher :
ISBN 13 :
Total Pages : 61 pages
Book Rating : 4.:/5 (79 download)

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Book Synopsis Influência de sistemas de manejo do solo sobre algumas propriedades físicas e químicas de um Podzolico Vermelho-Amarelo Cambico, fase terraco, e sobre a produção de milho (Zea mays L.). by : J. E. S. Bezerra

Download or read book Influência de sistemas de manejo do solo sobre algumas propriedades físicas e químicas de um Podzolico Vermelho-Amarelo Cambico, fase terraco, e sobre a produção de milho (Zea mays L.). written by J. E. S. Bezerra and published by . This book was released on 1978 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Com o objetivo de fazer uma avaliação comparativa do efeito de quatro sistemas de manejo de solo, plantio direto, arado de disco, arado de aiveca e grade pesada, foram avaliadas as propriedades fisicas e quimicas, utilizando-se o delineamento experimental em blocos casualizados e amostras retiradas apos a colheita em profundidades de 0cm - 5cm a 15cm - 20cm, consideradas subparcelas. A producao do milho foi analisada em delineamento de blocos casualizados, com quatro tratamentos e quatro repeticoes, para se avaliar os efeitos dos sistemas de manejo sobre a producao de milho e graos/planta e populacao final de plantas, exceto a testemunha. Os estudos fisico e quimico do solo mostraram que a estrutura, medida pela estabilidade dos agregados em agua, sofreu um efeito desagregante causado pelos sistemas de manejo estudados, quando comparados com a testemunha. Os melhores resultados, quer em producao, quer em stand final e incorporacao de materia organica, foram obtidos pelo sistema de manejo arado de aiveca, seguido de arado de disco, grade pesada e plantio direto. O plantio direto condicionou maior concentracao de P e K na superficie do solo. Foi observada a influencia dos sistemas de manejo sobre a producao obtida.

Efeito de sistemas de manejo do solo sobre algumas propriedades fisicas em Latossolo Vermelho Escuro

Author : D. A. Bonfante
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Efeito de sistemas de manejo do solo sobre algumas propriedades fisicas em Latossolo Vermelho Escuro by : D. A. Bonfante

Download or read book Efeito de sistemas de manejo do solo sobre algumas propriedades fisicas em Latossolo Vermelho Escuro written by D. A. Bonfante and published by . This book was released on 1983 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: O presente trabalho foi desenvolvido em Latossolo Vermelho Escuro, no Centro Nacional de Pesquisa de Trigo, EMBRAPA, Passo Fundo, com o objetivo de avaliar o efeito de diferentes sistemas de manejo do solo, com preparo convencional, preparo minimo com grade pesada, preparo minimo com arado cinzel mais grade leve e semeadura direta na sucessao de culturas trigo-soja, sobre algumas propriedades fisicas do solo. A semeadura direta por tres e seis anos apresentou maior estabilidade dos agregados, porosidade, materia organica, e menor densidade do solo que o preparo convencional do solo. O preparo mínimo com grade pesada apresentou maior estabilidade dos agregados que o preparo mínimo com escarificador tipo pe-de-pato e preparo convencional. A protecao superficial do solo com restos culturais e menor mobilizacao do solo aumentaram a estabilidade dos agregados, porosidade e materia organica e diminuiram a densidade do solo.

Dissertation Abstracts

Author : Escola Superior de Agricultura "Luiz de Queiroz".
Publisher :
ISBN 13 :
Total Pages : 472 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Dissertation Abstracts by : Escola Superior de Agricultura "Luiz de Queiroz".

Download or read book Dissertation Abstracts written by Escola Superior de Agricultura "Luiz de Queiroz". and published by . This book was released on 1972 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Soil Biodiversity in Amazonian and Other Brazilian Ecosystems

Author : Fattima M. S. Moreira
Publisher : CABI
ISBN 13 : 1845930320
Total Pages : 294 pages
Book Rating : 4.8/5 (459 download)

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Book Synopsis Soil Biodiversity in Amazonian and Other Brazilian Ecosystems by : Fattima M. S. Moreira

Download or read book Soil Biodiversity in Amazonian and Other Brazilian Ecosystems written by Fattima M. S. Moreira and published by CABI. This book was released on 2006-01-01 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews soil biodiversity and related ecological processes in one of the key biodiversity hotspots of the world, the Amazon, and nearby regions of Brazil. It covers both the tropical savannah and rainforests. Chapters describe the biology, ecology, taxonomy, geographic distribution and sampling methods for the most important soil functional groups. The book is based on a project "Conservation and Sustainable Management of Below-Ground Biodiversity", executed by TSBF-CIAT with co-financing from the Global Environment Facility (GEF) and implementation support from the United Nations Environment Programme (UNEP).

Food Security and Soil Quality

Author : Rattan Lal
Publisher : CRC Press
ISBN 13 : 1439800588
Total Pages : 434 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Food Security and Soil Quality by : Rattan Lal

Download or read book Food Security and Soil Quality written by Rattan Lal and published by CRC Press. This book was released on 2010-06-23 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Just five years ago, it was generally believed that the number of food insecure people in the world was on continuous decline. Unfortunately, widespread soil degradation along with resistance to recommended agronomic practices, and little attempt to restore degraded soils have conspired with significant droughts (in regions that could least tolerat

Managing Organic Matter in Tropical Soils: Scope and Limitations

Author : Christopher Martius
Publisher : Springer Science & Business Media
ISBN 13 : 9781402004551
Total Pages : 260 pages
Book Rating : 4.0/5 (45 download)

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Book Synopsis Managing Organic Matter in Tropical Soils: Scope and Limitations by : Christopher Martius

Download or read book Managing Organic Matter in Tropical Soils: Scope and Limitations written by Christopher Martius and published by Springer Science & Business Media. This book was released on 2002-01-31 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil organic matter is a reservoir for plant nutrients, provides water-holding capacity, stabilizes soil structure against compaction and erosion, and thus determines soil productivity. All agriculture to some degree depends on soil organic matter. It has long been known that soil organic matter declines when land is taken into cultivation, and that the productivity of new agricultural land is governed by fertility contributions from decomposing natural organic matter. The expansion of agriculture to ever new and more fragile lands, particularly in tropical and developing regions, causes environmental degradation with local effects on soil quality, regional effects on landscape integrity and water quality, and global effects on carbon cycles and the atmosphere. This book summarizes current knowledge of the properties and dynamics of soil organic matter in the tropics, its role in determining soil quality, its stability and turnover, and the options for management in the context of tropical landuse systems, for a readership of resource scientists, economists and advanced students. Maintenance of organic matter is critical for preventing land degradation. Case studies and practical applications are therefore an important part of the book, as are the exploration of future directions in research and management.

Application of Soil Physics in Environmental Analyses

Author : Wenceslau Geraldes Teixeira
Publisher : Springer
ISBN 13 : 3319060139
Total Pages : 508 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Application of Soil Physics in Environmental Analyses by : Wenceslau Geraldes Teixeira

Download or read book Application of Soil Physics in Environmental Analyses written by Wenceslau Geraldes Teixeira and published by Springer. This book was released on 2014-06-30 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance to preserve soil and water have is increasingly recognized. Agricultural practices and ecological trends both affect and are affected by soil physical properties. The more frequency of natural disasters, as landslides and thunderstorms addresses the importance to integrate soil characteristics in predictive models. Soil physics research has grown considerably specially in the use of innovative sensors, soil databases, and modeling techniques have been introduced into soil water relationship and environmental monitoring. Those advances are thoroughly dispersed in articles and conference proceedings In this volume, the authors will bring together the effectiveness of many new field and lab sensors and examine the current state-of-the-art in modeling and data analysis. It also includes innovative approaches and case studies in tropical soils. Future directions in soil physics research are given by key researchers in this discipline.

Anuário de pesquisa

Author : Universidade Federal do Rio Grande do Sul. Faculdade de Agronomia
Publisher :
ISBN 13 :
Total Pages : 342 pages
Book Rating : 4.A/5 ( download)

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Book Synopsis Anuário de pesquisa by : Universidade Federal do Rio Grande do Sul. Faculdade de Agronomia

Download or read book Anuário de pesquisa written by Universidade Federal do Rio Grande do Sul. Faculdade de Agronomia and published by . This book was released on 1988 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Boletim de divulgaçao - Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz."

Download Boletim de divulgaçao - Universidade de São Paulo, Escola Superior de Agricultura

Author : Escola Superior de Agricultura "Luiz de Queiroz."
Publisher :
ISBN 13 :
Total Pages : 476 pages
Book Rating : 4.:/5 (42 download)

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Book Synopsis Boletim de divulgaçao - Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz." by : Escola Superior de Agricultura "Luiz de Queiroz."

Download or read book Boletim de divulgaçao - Universidade de São Paulo, Escola Superior de Agricultura "Luiz de Queiroz." written by Escola Superior de Agricultura "Luiz de Queiroz." and published by . This book was released on 1974 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Soil Carbon

Author : Steven A Banwart
Publisher : CABI
ISBN 13 : 1780645325
Total Pages : 429 pages
Book Rating : 4.7/5 (86 download)

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Book Synopsis Soil Carbon by : Steven A Banwart

Download or read book Soil Carbon written by Steven A Banwart and published by CABI. This book was released on 2014-12-03 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together the essential evidence and policy opportunities regarding the global importance of soil carbon for sustaining Earth's life support system for humanity. Covering the science and policy background for this important natural resource, it describes land management options that improve soil carbon status and therefore increase the benefits that humans derive from the environment. Written by renowned global experts, it is the principal output from a SCOPE rapid assessment process project.

Sustainable Agriculture

Author : Eric Lichtfouse
Publisher : Springer Science & Business Media
ISBN 13 : 9048126665
Total Pages : 897 pages
Book Rating : 4.0/5 (481 download)

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Book Synopsis Sustainable Agriculture by : Eric Lichtfouse

Download or read book Sustainable Agriculture written by Eric Lichtfouse and published by Springer Science & Business Media. This book was released on 2009-11-11 with total page 897 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainability rests on the principle that we must meet the needs of the present without compromising the ability of future generations to meet their own needs. Starving people in poor nations, obesity in rich nations, increasing food prices, on-going climate changes, increasing fuel and transportation costs, flaws of the global market, worldwide pesticide pollution, pest adaptation and resistance, loss of soil fertility and organic carbon, soil erosion, decreasing biodiversity, desertification, and so on. Despite unprecedented advances in sciences allowing to visit planets and disclose subatomic particles, serious terrestrial issues about food show clearly that conventional agriculture is not suited any longer to feed humans and to preserve ecosystems. Sustainable agriculture is an alternative for solving fundamental and applied issues related to food production in an ecological way. While conventional agriculture is driven almost solely by productivity and profit, sustainable agriculture integrates biological, chemical, physical, ecological, economic and social sciences in a comprehensive way to develop new farming practices that are safe and do not degrade our environment. In that respect, sustainable agriculture is not a classical and narrow science. Instead of solving problems using the classical painkiller approach that treats only negative impacts, sustainable agriculture treats problem sources. As most actual society issues are now intertwined, global, and fast-developing, sustainable agriculture will bring solutions to build a safer world. This book gathers review articles that analyze current agricultural issues and knowledge, then propose alternative solutions. It will therefore help all scientists, decision-makers, professors, farmers and politicians who wish to build a safe agriculture, energy and food system for future generations.

Soil Processes and Current Trends in Quality Assessment

Author : Maria C. Hernandez Soriano
Publisher : BoD – Books on Demand
ISBN 13 : 9535110292
Total Pages : 448 pages
Book Rating : 4.5/5 (351 download)

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Book Synopsis Soil Processes and Current Trends in Quality Assessment by : Maria C. Hernandez Soriano

Download or read book Soil Processes and Current Trends in Quality Assessment written by Maria C. Hernandez Soriano and published by BoD – Books on Demand. This book was released on 2013-02-27 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural processes and human activities alter the properties and quality of soils over time. Nowadays, the growing interest in soil protection prompts abundant research to estimate soil quality in wide-ranging environmental scenarios. The assessment of soil quality entails the evaluation of the capability of a soil to perform its functions in present scenarios but also how those functions can be preserved for future land use. Currently, soil processes, physical, chemical, and biological properties are recognized as indicators to estimate soil quality. Soil processes and current trends in quality assessment provides a wide depiction of current research conducted in soil quality assessment, encompassing general studies on soil processes, evaluation of significant indicators of soil quality such as soil organic matter dynamic and soil-plant interaction, while presenting diverse strategies for soil fitness amelioration.