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Propriedades Fisicas Quimicas E Biologicas De Um Latossolo Vermelho Escuro Em Diferentes Ecossitemas
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Book Synopsis Propriedades físicas, químicas e biológicas de um latossolo vermelho-escuro em diferentes ecossitemas by : Maria Inês Nogueira Alvarenga
Download or read book Propriedades físicas, químicas e biológicas de um latossolo vermelho-escuro em diferentes ecossitemas written by Maria Inês Nogueira Alvarenga and published by . This book was released on 1996 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Propriedades de um latossolo vermelho-escuro e a sustentabilidade de diferentes ecossistemas by : M.I.N. Alvarenga
Download or read book Propriedades de um latossolo vermelho-escuro e a sustentabilidade de diferentes ecossistemas written by M.I.N. Alvarenga and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Avaliacao das caracteristicas quimicas, fisicas e biologicas de um latossolo vermelho-escuro submetido a diferentes sistemas de manejo by : C. D. de FARIA
Download or read book Avaliacao das caracteristicas quimicas, fisicas e biologicas de um latossolo vermelho-escuro submetido a diferentes sistemas de manejo written by C. D. de FARIA and published by . This book was released on 2001 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: A dominancia de sistemas agricolas convencionais de manejo dos solos de Cerrado, baseados no intensivo revolvimento, modifica a sua estrutura, alterando os parametros quimicos, fisicos e biologicos. Estes fatores, aliados a inadequacao da rotacao de culturas, tem resultado na reducao da capacidade produtiva de grande parte dos solos tropicais ao longo do tempo. O objetivo deste estudo foi avaliar as caracteristicas fisicas, quimicas e biologicas de um Latossolo Vermelho-Escuro submetido a diferentes sistemas agricolas de manejo. Utilizou-se uma area cultivada com Sistema de Plantio Direto e uma area cultivada com Sistema de Plantio Convencional. Em ambas as areas foi utilizada a cultura do arroz em monocultivo ou em rotacao anual e bienal com milho ou soja. Foi usada tambem a sequencia milheto/arroz, crotalaria/arroz ou em rotacao bienal, trienal ou quadrienal. As caracteristicas fisicas do solo foram avaliadas atraves de amostras indeformadas no perfil de 10-20 cm de profundidade. As amostras do solo para fins de analise de fertilidade do solo foram coletadas com trado de rosca nas profundiades de 0 a 5, 5 a 20, 20 a 40 e 40 a 60 cm apos a colheita de cada sistema de producao. Foram feitas tambem amostragens do solo para determinar a populacao subterranea de mesofauna em subamostras de um dm de solo. As amostragens foram realizadas aos 30 dias apos a germinacao das culturas. O delineamento utilizado para as analises de variancia foi completamente casualizado. Os sistemas agricolas nao influenciaram estatisticamente nos valores de densidade do solo, porosidade total, micro e macroporosidade do solo, quando comparados dentro do mesmo sistema de plantio. Embora, os valores de densidade do solo tenham sido elevados no Sistema de Plantio Direto, os sistemas agricolas (arroz em sucessao) e (crotalaria/arroz. em sucessao) foram os que mais contribuiram para uma maior reducao da densidade do solo. Os resultados de fertilidade do solo evidenciam que os valores medios da acidez solo nos diferentes sistemas de preparo do solo estudados variaram de acidez media a moderada em todas as profundidades amostradas, portanto, com valores que possibilitam uma maior disponibilidade de nutrientes para as plantas. Nas parcelas onde a sequencia de culturas envolveu gramineas e leguminosas, foram verificados maiores valores de pH, soma de bases e saturacao por bases. O sistema agricola que apresentou o maior numero de cupins e minhocas no Sistema de Plantio Direto foi o sistema cultivado com milheto/arroz durante quatro anos seguidos. No Sistema de Plantio Direto foi o sistema cultivado com milheto/arroz durante quatro anos seguidos. Nos Sistema de Plantio Convencional o numero destes animais do solo foi maior quanto se utilizaram quatro cultivos sucessivos de arroz e um de soja. Os baixos niveis populacionais de cupins encontrados em alguns sistemas pode ser devida a sucessao de culturas, principalmente gramineas seguidos de gramineas.
Book Synopsis Comportamento de caracteristicas e propriedades fisicas de um latossolo vermelho escuro, submetido a diferentes sistemas de cultivos by : W. V. Moraes
Download or read book Comportamento de caracteristicas e propriedades fisicas de um latossolo vermelho escuro, submetido a diferentes sistemas de cultivos written by W. V. Moraes and published by . This book was released on 1984 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: O homem tem se valido, atraves dos tempos, de diferentes metodos de preparo do solo, visando favorecer o crescimento das plantas. Ha pouco mais de 50 anos, os cientistas do solo comecaram a desenvolver de cultivo que aliassem um menor custo com a conservacao do solo e do meio ambiente. Estudou-se um Latossolos Vermelho Escuro em duas caracteristicas e propriedades fisicas, quando submetidas ha tres anos ao plantio convencional, (1 aracao + 2 gradagens) e sob plantio direto, comparados ao solo original, sob cerrado. As amostras foram provenientes de experimento montado no CNPMS da EMBRAPA. em Sete Lagoas. Os parametros analisados foram: densidade do solo; densidade de particulas; porosidade total; macro e microporosidade; estabilidade de agregados; capacidade de retencao de agua; analise textural; argila dispersa em agua; consistencia do solo e carbono organico. Para fins de caracterizacao foram feitos as seguintes analises: oxidos de ferro livre: ataque sulfurico; reacao do solo; complexo sortivo e capacidade de troca de cations. Avaliou-se os resultados estatisticamente, segundo delineamento experimental inteiramente casualizado em esquema fatorial 3 x 6 x 3 sendo os fatores: cultivos, horizontes e repeticoes. Para a estabilidade de agregados utilizou-se o fatorial 2 x 6 x 4, sendo os fatores horizontes, peneiras e repeticoes, respectivamente. Os resultados indicaram que alguns parametros foram mais susceptiveis a acao dos cultivos, permitindo as seguintes alteracoes: 1. Aumento da densidade do teor de (...).
Book Synopsis Caracterizacao da solucao do solo e das propriedades fisicas e quimicas de um latossolo vermelho-amarelo sob diferentes coberturas vegetais by : J. Miranda
Download or read book Caracterizacao da solucao do solo e das propriedades fisicas e quimicas de um latossolo vermelho-amarelo sob diferentes coberturas vegetais written by J. Miranda and published by . This book was released on 1993 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: Esta pesquisa foi realizada em amostras de um Latossolo Vermelho-Amarelo, objetivando adaptar um sistema de extracao da solucao de solo por centrifugacao, estudar a variacao dos teores de carbono organico dissolvido e de alguns ions na solucao de solos sob diferentes coberturas vegetais, assim como identificar alteracoes nas propriedades fisicas e quimicas do solo advindas do seu uso. Os materiais de solo estudados foram selecionados com a condicao de pertencerem a mesma posicao topografica (de topo) e a mesma classe de solo e foram coletados na profundidade de 0 a 15 cm, sob as tres coberturas vegetais (mata, eucalipto e pastagem). Os resultados permitem concluir que: - o solo sob pastagem apresentou um empobrecimento relativo de argila; - os solos sob mata natural sao mais ricos em carbono organico, Ca2+, Mg2+, Al2+, Na+ e K+; - o sistema de extracao da solucao do solo por centrifugacao, adaptado no presente trabalho, se mostrou adequado; - os solos sob mata natural e eucalipto permitem a extracao da solucao do solo em camadas indeformadas; as solucoes de solos sob mata natural apresentaram maior teor de carbono organico dissolvido; e - em algumas solucoes de solo foi encontrado um material em suspensao cuja composicao mineralogica indicou a presenca de caulinita e goethita.
Book Synopsis Taxa de infiltracao e algumas propriedades fisicas de um latossolo vermelho-escuro sob diferentes sistemas de manejo by : A.V. de AGUIAR
Download or read book Taxa de infiltracao e algumas propriedades fisicas de um latossolo vermelho-escuro sob diferentes sistemas de manejo written by A.V. de AGUIAR and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fertilizing for High Yield and Quality by : Lindbergue Araújo Crisóstomo
Download or read book Fertilizing for High Yield and Quality written by Lindbergue Araújo Crisóstomo and published by . This book was released on 2007 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acerola; Banana; Cashew: dwarf variety; Citrus; Coconut: green dwarf variety; Guava; Mango; Papaya; Passion-fruit; Pineapple; Soursop.
Book Synopsis Soil Survey Manual (U.S. Department of Agriculture Handbook No. 18) by : U.S. Department of Agriculture
Download or read book Soil Survey Manual (U.S. Department of Agriculture Handbook No. 18) written by U.S. Department of Agriculture and published by Lulu.com. This book was released on 2019-04-06 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Soil Survey Manual, USDA Handbook No. 18, provides the major principles and practices needed for making and using soil surveys and for assembling and using related data. The term "soil survey" is used here to encompass the process of mapping, describing, classifying, and interpreting natural three-dimensional bodies of soil on the landscape. This work is performed by the National Cooperative Soil Survey in the United States and by other similar organizations worldwide. The Manual provides guidance, methodology, and terminology for conducting a soil survey but does not necessarily convey policies and protocols required to administer soil survey operations. The soil bodies contain a sequence of identifiable horizons and layers that occur in repeating patterns in the landscape as a result of the factors of soil formation as described by Dokuchaev (1883) and Jenny (1941).
Book Synopsis The Ecology of Trees in the Tropical Rain Forest by : I. M. Turner
Download or read book The Ecology of Trees in the Tropical Rain Forest written by I. M. Turner and published by Cambridge University Press. This book was released on 2001-07-05 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our knowledge of the ecology of tropical rain-forest trees is limited, yet a good understanding of the trees is essential to unravelling the workings of the forest itself. This book aims to summarise contemporary understanding of the ecology of tropical rain-forest trees, with particular emphasis on comparative ecology.
Download or read book Legumes of Bahia written by G. P. Lewis and published by Royal Botanic Gardens Kew. This book was released on 1987 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background; The family Leguminosae; Topography; Vegetation; Statistical analysis of legumes in Bahia; Phytogeography; Format; Citation of localities; Citation of collectors and their material; Key to subfamilies; Synopsis of tribes; Caesalpinioideae; Mimosoideae; Papilionoideae; Appendices; Herbaria cited; Municipios; Cultivated legumes; Legume collectors 1816-1983.
Download or read book MetaWin written by Michael S. Rosenberg and published by . This book was released on 1997 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tropical Rain Forests by : Richard T. Corlett
Download or read book Tropical Rain Forests written by Richard T. Corlett and published by John Wiley & Sons. This book was released on 2011-03-03 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of Tropical Rain Forests: an Ecological and Biogeographical Comparison exploded the myth of ‘the rain forest’ as a single, uniform entity. In reality, the major tropical rain forest regions, in tropical America, Africa, Southeast Asia, Madagascar, and New Guinea, have as many differences as similarities, as a result of their isolation from each other during the evolution of their floras and faunas. This new edition reinforces this message with new examples from recent and on-going research. After an introduction to the environments and geological histories of the major rain forest regions, subsequent chapters focus on plants, primates, carnivores and plant-eaters, birds, fruit bats and gliding animals, and insects, with an emphasis on the ecological and biogeographical differences between regions. This is followed by a new chapter on the unique tropical rain forests of oceanic islands. The final chapter, which has been completely rewritten, deals with the impacts of people on tropical rain forests and discusses possible conservation strategies that take into account the differences highlighted in the previous chapters. This exciting and very readable book, illustrated throughout with color photographs, will be invaluable reading for undergraduate students in a wide range of courses as well as an authoritative reference for graduate and professional ecologists, conservationists, and interested amateurs.
Book Synopsis Meta Win 2.0 by : Michael S. Rosenberg
Download or read book Meta Win 2.0 written by Michael S. Rosenberg and published by Sinauer Associates Incorporated. This book was released on 1999-10-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: MetaWin, first published in 1997, allows the user to easily carry out all common meta-analysis calculations on multiple independent studies from a wide variety of disciplines, including medicine, ecology, and the social sciences. Version 2.0 allows users to calculate any of six different effect sizes (vs. two, as in Version 1.0) from their data, and includes its own spreadsheet editor and statistical calculator. The analysis routine is greatly expanded, and graphics (e.g., funnel plots, histograms, etc.) have been added.
Book Synopsis Soil Quality for Crop Production and Ecosystem Health by : E.G. Gregorich
Download or read book Soil Quality for Crop Production and Ecosystem Health written by E.G. Gregorich and published by Elsevier. This book was released on 1997-11-10 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil is a complex body that exists as many types, each with diverse properties that may vary widely across time and space as a function of many factors. This complexity makes the evaluation of soil quality much more challenging than that of water or air quality. Evaluation of soil quality now considers environmental implications as well as economic productivity, seeking to be more holistic in its approach.Thus, soil quality research draws from a wide range of disciplines, blending the approaches of biologists, physicists, chemists, ecologists, economists and agronomists, among others.This book presents a broad perspective of soil quality that includes these various perspectives and gives a strong theoretical basis for the assessment of soil quality.A short glossary provides definitions for terms used throughout the book.
Book Synopsis A Preliminary Polypore Flora of East Africa by : Inger Johansen
Download or read book A Preliminary Polypore Flora of East Africa written by Inger Johansen and published by . This book was released on 1980 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Palms of the Amazon by : Andrew Henderson
Download or read book The Palms of the Amazon written by Andrew Henderson and published by . This book was released on 1995 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: The palms are among the most abundant, diverse, and important families of plants found in the Amazon. Based on extensive field work, this book provides a systematic treatment of all palms that occur naturally in the Amazon region. Each species is exhaustively described with reviews of their distribution, habitat, and ecology. Introductory chapters describe the physical setting of the Amazon region as well as on the biogeography and ecology of the palm family. This first modern treatment of the 135 species of Amazon palms provides a definitive account of their ecology, uses, and biogeography. It will be welcomed by students, teachers, and researchers of botany, ecology, agronomy, and conservation biology.
Book Synopsis Soil Salinity Assessment by : J. D. Rhoades
Download or read book Soil Salinity Assessment written by J. D. Rhoades and published by Food & Agriculture Org.. This book was released on 1999 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determination of soil salinity from aqueous electrical conductivity; determination of soil salinity from soil-paste and bulk soil electrical conductivity; example uses of salinity assessment technology; operational and equipment costs associated with salinity instrumentation measurement techniques.
