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O Impacto De Sistemas Integrados De Lavoura E Pastagens Na Biomassa C E Na Atividade Biologica De Um Latossolo Vermelho Escuro De Cerrado
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Book Synopsis Atividade enzimática de um latossolo vermelho de cerrado sob sistemas integrados lavoura-pastagens by : L. G. Silva
Download or read book Atividade enzimática de um latossolo vermelho de cerrado sob sistemas integrados lavoura-pastagens written by L. G. Silva and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impacto de sistemas de integração lavoura-pecuária na qualidade física do solo by : GLENIO GUIMARÃES SANTOS Santos
Download or read book Impacto de sistemas de integração lavoura-pecuária na qualidade física do solo written by GLENIO GUIMARÃES SANTOS Santos and published by . This book was released on 2010 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Na medida em que se intensifica o uso agrícola, os atributos físico-hídricos do solo sofrem alterações, geralmente adversas ao crescimento vegetal e essas modificações ficam mais nítidas, quando os sistemas de uso do solo são comparados com o estado do solo ainda sob vegetação natural do cerrado. A utilização do sistema de integração de lavoura-pecuária pode acarretar mudanças acentuadas nos atributos físicos, químicos e biológicos do solo e podem afetar o desenvolvimento e, consequentemente, a produção das culturas que venham em sequencia ao pastejo. Este estudo teve como objetivo geral analisar quantitativamente, por meio de atributos físico-hídricos, as principais alterações na qualidade do solo, decorrentes da utilização do longo prazo em sistema de integração de lavoura-pecuária, conduzidos em ambiente de cerrado. O estudo foi realizado a partir da abertura de trincheiras na Fazenda Capivara, Embrapa Arroz e Feijão, e em área particular, ao lado da propriedade da Embrapa, onde amostras de solo foram coletadas nas profundidades: 2,5-7,5 cm, 12,5-17,5 cm, 22,5-27,5 cm, 72,5-77,5 cm e 142,5-147,5 cm. As avaliações foram realizadas em seis sistemas, com área media de 13,5 hectares cada, sendo caracterizadas pelo seu uso atual como: sistema P1 (pastagem de Encachiaria brizantha com quatro ano de uso); sistemas P2 (pastagem de Encachiaria brizantha com dois ano de uso); sistemas P3 (pastagem de Encachiaria brizantha com três anos de uso); sistema C1 (soja sob plantio direto); sistema C2 (arroz sob plantio convencional) e; C3 (milho + Encachiaria brizantha sob plantio direto). Foi também usada uma sétima área de cinco hectares, mantida sob pastagem continua de Encachiaria decumbens, por 19 anos após a implantação designada por CP e uma oitava área de cerrado nativo chamado CE. De forma geral, os atributos físicos-hídricos e dentre eles as curvas de retenção de agua do solo e os respectivos valores do índice-S são alterados, quando submetidos ao manejo com implementos agrícolas e ao pastoreio animal, se comparados a área de cerrado nativo, considerada área de referencia neste estudo. O uso do índice-S para avaliar a quantidade física do solo, do ponto de vista de sua estrutura de qualidade por meio da curva de retenção de agua pode ser uma opção viável, uma vez que não tem algumas das limitações encontradas no uso de outros indicadores de qualidade do solo. Contudo, sua aplicação demanda um numero maior de investigações regionalizadas para diferentes sistemas de manejo e plantas cultivadas, tipos de solo, clima, atividade biológica do solo, dentre outros, relacionados seus valores críticos a índices medi-os de produtividade agrícola, para que se possa utiliza-lo com segurança na determinação da qualidade física "efetiva" do solo.
Book Synopsis Biomassa e atividade microbiana num LE de cerrado sob pastagens, culturas anuais e sistemas integrados de culturas anuais/pastagens by : J.R.A. Oliveira
Download or read book Biomassa e atividade microbiana num LE de cerrado sob pastagens, culturas anuais e sistemas integrados de culturas anuais/pastagens written by J.R.A. Oliveira and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Cerrados of Brazil by : Paulo S.
Download or read book The Cerrados of Brazil written by Paulo S. and published by Columbia University Press. This book was released on 2013-02-05 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: The massive grasslands of Brazil -- known as the cerrados -- which cover roughly a quarter of its land surface and are among the most threatened regions in South America, have received little media attention. This book brings together leading researchers on the area to produce the first detailed account in English of the natural history and ecology of the cerrado/savanna ecosystem. Given their extent and threatened status, the richness of their flora and fauna, and the lack of familiarity with their unique ecology at the international level, the cerrados are badly in need of this important and timely work.
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 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 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 Australian Journal of Agricultural Research by :
Download or read book Australian Journal of Agricultural Research written by and published by . This book was released on 2000 with total page 442 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 Southern Forages by : Donald M. Ball
Download or read book Southern Forages written by Donald M. Ball and published by . This book was released on 1996 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Physiology of Vegetable Crops, 2nd Edition by : Hans Christian Wien
Download or read book The Physiology of Vegetable Crops, 2nd Edition written by Hans Christian Wien and published by CABI. This book was released on 2020-05-01 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Completely updated and revised, this bestselling book continues to explain the growth and developmental processes involved in the formation of vegetables. Since the publication of the successful first edition significant discoveries, particularly in the area of molecular biology, have deepened and broadened our knowledge and understanding of these processes. This new edition brings the topic up-to-date and is presented over two sections: the first provides general knowledge on germination, transplanting, flowering, the effects of stress and modelling, whilst the second section details the physiology of specific crops or crop groups.
Book Synopsis The Ecology of Neotropical Savannas by : Guillermo Sarmiento
Download or read book The Ecology of Neotropical Savannas written by Guillermo Sarmiento and published by Harvard University Press. This book was released on 1984 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Integrated view of the genesis of grasslands of the New World tropics, especially those of Venezuela.
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 Management for Sustainability by : R. Lal
Download or read book Soil Management for Sustainability written by R. Lal and published by . This book was released on 1991 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book manuscripts presented originally at a World Association of Soil and Water Conservation conference held in 1989 are collected. Topics include basic processes (e.g. soil structure, soil erosion, soil compaction); management options (e.g. conservation tillage); policy issues and priorities
Download or read book Alley Farming written by B. T. Kang and published by IITA. This book was released on 1999 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Tropical Agriculturalist is a series of practical field guides and textbooks for: producers, farmers and farm managers, agricultural extension officers agricultural diploma, degree and vocational students, teachers and lecturers, senior secondary students, as reference books, adult education, rural and community development programmes.
