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Efeito Do Fosforo Na Cultura Do Arroz Oryza Sativa L Sob Diferentes Niveis De Agua Em Solos De Varzea De Minas Gerais
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Book Synopsis Efeito do fósforo na cultura do arroz (Oryza sativa L.) sob diferentes níveis de água em solos de várzea de Minas Gerais by : Francisco Sandro Rodrigues Holanda
Download or read book Efeito do fósforo na cultura do arroz (Oryza sativa L.) sob diferentes níveis de água em solos de várzea de Minas Gerais written by Francisco Sandro Rodrigues Holanda and published by . This book was released on 1992 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Host Bibliographic Record for Boundwith Item Barcode 30112100650693 and Others by :
Download or read book Host Bibliographic Record for Boundwith Item Barcode 30112100650693 and Others written by and published by . This book was released on 2013 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influência do fósforo, do potássio e do manejo de água sobre a qualidade fisiológica e a produção de sementes de arroz (Oryza sativa L.). by : J. L. Nedel
Download or read book Influência do fósforo, do potássio e do manejo de água sobre a qualidade fisiológica e a produção de sementes de arroz (Oryza sativa L.). written by J. L. Nedel and published by . This book was released on 1979 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: Testar os efeitos de três níveis de fósforo e potássio e três manejos de água sobre a qualidade fisiológica e produção de sementes de arroz irrigado.
Book Synopsis Efeito das épocas de calagem na disponibilidade de fósforo aplicado 180 dias antes do plantio do arroz (Oryza sativa, L.) em latossolos sob cerrado by : J. R. Méndez Baldeón
Download or read book Efeito das épocas de calagem na disponibilidade de fósforo aplicado 180 dias antes do plantio do arroz (Oryza sativa, L.) em latossolos sob cerrado written by J. R. Méndez Baldeón and published by . This book was released on 1986 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foi conduzido um experimento em casa-de-vegetação, com superfosfato e fosfato de Araxá parcialmente solubilizado, em dois latossolos com os objetivos de: a) avaliar a eficiência da aplicação prévia em relação às diferentes épocas de calagem, sobre o rendimento de matéria seca e fósforo absorvido pelo arroz de sequeiro em solos sob cerrado; b) investigar a mudança na disponibilidade de fósforo, nas diferentes épocas de aplicação do calcário, considerando o tempo de reação entre calcário e fosfato e c) estudar as relações entre as frações de fosfatos inorgânicos e os teores de fósforo disponível obtidos em diferentes extratores.
Book Synopsis Efeito do manejo da água no crescimento e absorção de N, P, K, Fe, Mn e Zn pelo arroz (Oryza sativa L., cv. "IAC-25"). by : M. S. Scalco
Download or read book Efeito do manejo da água no crescimento e absorção de N, P, K, Fe, Mn e Zn pelo arroz (Oryza sativa L., cv. "IAC-25"). written by M. S. Scalco and published by . This book was released on 1983 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Verificar o efeito de vários níveis de umidade no solo e diferentes intervalos de irrigação sobre algumas características de crescimento e absorção de nitrogênio, fósforo, potássio, ferro, manganês e zinco pela cultivar de arroz de sequeiro IAC-25, cultivada em solo de várzea.
Book Synopsis Efeitos da aplicação de calcário, fósforo e zinco no crescimento e nutrição do trigo (Triticum aestivum L.) e arroz (Oryza sativa L.) em dois solos de várzeas do estado de Minas Gerais by : L. F. Pereira
Download or read book Efeitos da aplicação de calcário, fósforo e zinco no crescimento e nutrição do trigo (Triticum aestivum L.) e arroz (Oryza sativa L.) em dois solos de várzeas do estado de Minas Gerais written by L. F. Pereira and published by . This book was released on 1985 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tranformações do fósforo em solos ácidos e sua disponibilidade para a cultura de arroz de sequeiro (Oryza sativa L.). by : M. P. Barbosa Filho
Download or read book Tranformações do fósforo em solos ácidos e sua disponibilidade para a cultura de arroz de sequeiro (Oryza sativa L.). written by M. P. Barbosa Filho and published by . This book was released on 1986 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foram conduzidos dois experimentos em casa de vegetação, com superfosfato triplo (SPT) e fosfato de Arax parcialmente vsolubilizado (FAPS), em dois Latossolos com os objetivos de: a) estudar as transformações de adubos fosfatados no solo, aplicados após diferentes épocas em relação calagem; b) estudar as relações entre os teores de fosfatos inorgânicos e os teores de fósforo "dispon¡vel" obtidos em diferentes extratores e c) avaliar a eficiência do FAPS e do SPT como fontes de fósforo para arroz de sequeiro, em função do tempo de aplicação. A equivalência dos dois fosfatos ao SPT diminui a medida que aumenta o tempo de incubação, tendo sido a do FAPS sempre menor em todos os per¡odos de incubação, principalmente em solos que recebem calcário, exceto no LVD quando o FAPS é aplicado no tempo zero. A eficiência agronômica do FAPS comparada a do SPT varia com o tempo de incubação, apresentando no tempo zero, uma eficiência superior a do SPT.
Book Synopsis Efeito do ferro, gesso agrícola e calcário na produção de arroz (Oryza sativa L.) em solos de várzea inundados by : F. J. de M. BASTOS
Download or read book Efeito do ferro, gesso agrícola e calcário na produção de arroz (Oryza sativa L.) em solos de várzea inundados written by F. J. de M. BASTOS and published by . This book was released on 1993 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nos solos de várzea, durante o período de inundação, ocorrem transformações fisico-químicas, eletroquímicas e biológicos que são muito importantes para a nutrição das plantas, principalmente para o arroz, que é a cultura freqüentemente cultivada nestes solos. Nesse contexto, uma das mais importantes alterações químicas que ocorrem quando um solo é submerso, é o fenômeno da redução dos óxidos de ferro com um conseqüente aumento da solubilidade de Fe+2, podendo resultar em toxidez à planta. O presente trabalho teve por objetivo avaliar o efeito do ferro, gesso agrícola e calcário no crescimento e produção de arroz em solos de várzea inundados.
Book Synopsis Efeito de fontes de nitrogenio -15N e de modos de aplicacao da ureia -15N em cultura de arroz (Oryza sativa, L.). by : O. G. Bastidas Ortiz
Download or read book Efeito de fontes de nitrogenio -15N e de modos de aplicacao da ureia -15N em cultura de arroz (Oryza sativa, L.). written by O. G. Bastidas Ortiz and published by . This book was released on 1981 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Utilizando-se dois tipos de solo: Latossol Vermelho Escuro (LE) e Podzol Vermelho Amarelo var. Marilia (PVA), o presente trabalho foi realizado com o objetivo de estudar em condicoes de casa de vegetacao, os efeitos da aplicacao, na cultura de arroz, de doses diferentes de sulfato de amonio-15N e da urea-15N na ausencia e presenca de fosforo, e da ureia-15N aplicada de diferentes maneiras, na producao de material vegetal seco (MVS), na quantidade de nitrogenio total absorvido (NTP), na porcentagem de nitrogenio na planta proveniente do fertilizante (%NPPF), na quantidade de nitrogenio na planta proveniente do fertilizante (QNPPF), na eficiencia de utilizacao do fertilizante nitrogenado (EUFN) e no valor "AN". Atraves dos resultados obtidos, comprovou-se que os parametros producao de MVS, NTP, %NPPF, EUFN, e valor "AN" sao influenciados pelo solo. Devido ao fato do Latossolo ser mais deficiente em fosforo, a producao de MVS, neste solo, aumentou com as doses de nitrogenio e fosforo, com a urea e o sulfato de amonio, enquanto que no Podzolizado houve um efeito depressivo na producao de MVS com aplicacao de 550 kg/ha de P. Quanto aos modos de aplicacao, os valores do MVS foram similares para os dois solos. O NTP aumentou com os niveis de fosforo e as doses de nitrogenio para ambas as fontes e ambos os solos. A maior %NPPF no Latossolo, obteve-se com o nivel de 55 kg/ha de P e 100 kg/ha de N, para ambos as fontes, enquanto no Podzolizado, as maiores %NPPF foram obtidas com as doses de 100 kg/ha de N quando nao se adicionou fosforo, para ambos as fontes. A maior QNPPF nos dois solos foi encontrada com a maior dose de aplicacao do nitrogenio de ambas as fontes e com os niveis de 55 kg/ha de P para o PVA e 550 kg/ha de P para o LE. Um aumento da EUFN foi observado com os niveis crescentes de nitrogenio e fosforo, obtendo-se os maximos valores de 52,05% para ureia e de 42,89% para o sulfato de amonio, no solo Podzolizado. Para Latossolo, os maiores valores foram 49,9% com a ureia e 35,9% com o sulfato de amonio. O modo de aplicacao da ureia solido misturado, acusou maior EUFN no Podzolido (58%). No Latossolo, a maior EUFN foi obtida com o modo de aplicacao liquido em camadas (43,88%). Os valores "AN" foram constantes na maioria dos tratamentos dentro das fontes e dentro dos solos. Estudos mais apurados devem ser feitos a respeito da tecnica a ser utilizada e da interpretacao a ser dada a estes valores.
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
Book Synopsis Compendium of Peanut Diseases by : N. Kokalis-Burelle
Download or read book Compendium of Peanut Diseases written by N. Kokalis-Burelle and published by American Phytopathological Society. This book was released on 1997 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compendium of Peanut Diseases, Second Edition is a guide to the identification, diagnosis, and control of peanut diseases and disorders. Bringing together color photographs and authoritative information in a single volume, this convenient compendium is a valuable resource for peanut growers and crop consultants around the world.This compendium has become a standard guidebook for the peanut industry. The contributors are an international group that includes 50 peanut experts from the United States, India, The Peoples Republic of China, Malawi, Australia, Israel, and South Africa. They offer advice on diseases and disorders found in each of the world's major peanut-growing regions.Detailed descriptions of 55 peanut diseases are the core of the book. Covering diseases caused by fungi, bacteria, nematodes, and viruses, these descriptions present detailed information on symptoms, causal organisms, disease cycle, control, host range, transmission, detection, and epidemiology. In addition to diseases, the compendium also describes peanut disorders caused by environmental stress, insects and arthropods, and parasitic flowering plants. Other sections of the compendium cover beneficial organisms, organisms with an undetermined relationship to peanuts, disease management strategies, genetic modification, and a listing of disease and insect resistant cultivars currently available for use by growers and breeders.
Book Synopsis Advances in Robotics by : Calin Ciufudean
Download or read book Advances in Robotics written by Calin Ciufudean and published by Createspace Independent Pub. This book was released on 2013-03-15 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Robotics - Modeling, Control and Applications is suitable for advanced undergraduate students and postgraduate students. It takes a practical approach rather than a conceptual approach. It offers a truly reader-friendly way to get to the subject, providing a definitive guide in this vibrant and evolving discipline. This book is an invaluable companion for students from their first encounter with the subject to more advanced studies, while the high quality artworks are designed to present the key concepts with simplicity, clarity and consistency. There are totally 18 chapters in this book. Chapter 1 proposes a simple control system for a biped robot using nonlinear oscillators based on the physiological concept of central pattern generator and physiological evidence of phase resetting. Chapter 2 presents work that attempts to extract principles by which spiders and other species achieve these features. Chapter 3 proposes methods for a robot manipulator with a racket to do two kinds of ball juggling, the paddle juggling and the wall juggling, based on discrete control systems of states of the hit ball. Chapter 4 proposed a new control algorithm in a robot arm based on active tactile slippage sensation. Chapter 5 provides a look at some possibilities of modern voice analysis technologies in the field of ambient assisted living, which seems to be a promising application for robotic systems. Chapter 6 focuses on adaptive filtering techniques for acoustics application. Adaptive acoustic in an important topic for signal processing in robots since robot sound inputs are usually recollected through acoustic sensors. Chapter 7 aims at examining the method and equipment of preliminary-announcement of the upcoming operation of a mobile robot moving on a two-dimensional plane to those who are in the surroundings. Chapter 8 introduces two kinds of instruction learning systems for partner robots: (1) a hand image instruction learning system; and (2) three kinds of voice learning systems, using Kohonen's self-organizing map (SOM) and its variations such as Transient-SOM (T-SOM), Parameter-less SOM (PL-T-SOM) and Parameter-less Growing SOM (PL-G-SOM). Chapter 9 presents the study on throw-over movement informing a receiver of the object landing distance as an example of the informative motion for human synergetic robots. In Chapter 10, the author examines the application of a touch screen to an operational interface of a mobile robot remote operation system. Chapter 11 describes low processing approach for identification of obstacles in a robotic soccer team. Chapter 12 couples a general purpose stat/space representation with a reactive algorithm for mobile robot navigation In Chapter 13, the author designs an general-purposed affective behavior decision system based on linear dynamics to solve the limitation that affective model is difficult to be applied to various social robots without redesigning. Chapter 14 proposes a control mechanism based on multiple-criteria decision making for autonomous control of ambient environment. Chapter 15 proposes an information gathering support system in post-disaster environment by utilizing a robot sensor network in which a teleoperated mobile robot deploys wireless sensor nodes (SNs). Chapter 16 proposes fault accommodation procedure in discrete-event robots. Chapter 17 deals with application of robotic technology for performing risky tasks, mainly for de-mining operations. Finally, Chapter 18 briefly describes an application of robot in medial health.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9251325189 Total Pages :156 pages Book Rating :4.2/5 (513 download)
Book Synopsis Report of the Expert Meeting on Ciguatera Poisoning by : Food and Agriculture Organization of the United Nations
Download or read book Report of the Expert Meeting on Ciguatera Poisoning written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2020-06-01 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytoplankton blooms, micro-algal blooms, toxic algae, red tides, or harmful algae, are all terms for naturally occurring phenomena that have occurred throughout recorded history. About 300 hundred species of micro algae are reported at times to form mass occurrence, so called blooms. Nearly one fourth of these species are known to produce toxins. Even non-toxic algal blooms can have devastating impacts when they lead to kills of fish and invertebrates by generating anoxic conditions. Some algal species, although non-toxic to humans, can produce exudates that can cause damage to the delicate gill tissues of fish (raphidophytes Chattonella, Heterosigma, and dinoflagellates Karenia, Karlodinium) . Aquatic animals can suffer devastating mortalities, which could lead economical and food losses, and eventually became a food security problem. Of greatest concern to humans are algal species that produce potent neurotoxins that can find their way through shellfish and fish to human consumers where they evoke a variety of gastrointestinal and neurological illnesses (paralytic shellfish poisoning (PSP), amnesic shellfish poisoning (ASP), diarrhoeic shellfish poisoning (DSP), neurotoxic shellfish poisoning (NSP), azaspiracid shellfish poisoning (AZP) and ciguatera fish poisoning (CFP)). Worldwide, ciguatoxins are estimated to cause around 50 000 cases of ciguatera fish poisoning annually; neurological effects may last for weeks or even years and one percent of these cases are fatal . Climate change and costal water over enrichment create an enabling environment for harmful algal blooms, which seem to have become more frequent, more intense and more widespread in the past decades.
Book Synopsis Vegetation of the Earth and Ecological Systems of the Geo-biosphere by : Heinrich Walter
Download or read book Vegetation of the Earth and Ecological Systems of the Geo-biosphere written by Heinrich Walter and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytomass and Primary Production of the Various Vegetational Zones and of the Entire Biosphere The biosphere is that thin layer at the earth's surface in which living organisms exist and biological cycling takes place. It includes the upper horizons of the soil in which plants root, the atmosphere near the ground, (insofar as organisms penetrate this space), and all the surface waters. More than 99% of the earth's biomass is phytomass, to which we shall limit our discussion. Amounts of phytomass are distinctly related to vegeta tional zones. Because accurate determination of phytomass and primary production is difficult, only gross estimates have been available until recently. However, in 1970, Bazilevich et al. published (in Russian) more accurate calculations, based on the rapidly accumulating literature, for the various thermal zones and bioclimatic regions of the earth. These authors calculated mean phyto mass and mean annual primary production for the various regions as dry mass (in tons) per hectare. On the basis of measurements of the areas covered by the individual regions, excluding rivers, lakes, glaciers, and permanent snow, total phytomass and total annual primary production for the various regions were obtained (see table). The sum of these figures is the phytomass and annual production of the land surface of the earth. In addition, the table gives corresponding data for the waters of the earth. The values involved are potential i. e. , they are based on natural vegetation uninfluenced by man.
Book Synopsis Climate Dynamics of the Tropics by : S. Hastenrath
Download or read book Climate Dynamics of the Tropics written by S. Hastenrath and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of my book "Climate and Circulation of the Tropics" was reasonably up to date to the middle of 1985. In a second printing in 1988 it was possible to complete a few literature references and to correct some misprints. However, vigorous research has taken place over the past five years in various areas of tropical climate dynamics, especially in the atmosphere-ocean mechanisms of climate anomalies, climate prediction, ocean circulation, and paleoclimates. Promising progress has also been made in the application of general circulation modelling to tropical climate problems. In the present second edition, named "Climate Dynamics of the Tropics", I have attempted to incorporate much of the recent work to late 1990. Chapters 8 and 9 have been essentially re-written, and major additions have been made to Chapters 4 and 12 in particular. I would like to acknowledge the continued support by the U.S. National Science Foundation over the past five years. B. Parthasarathy, Poona, and H. Lessmann, San Salvador, sent me updates of data series not easily accessible. I have benefitted from discussions with numerous colleagues in the United States and overseas. In the preparation of this second edition, Marilyn Wolff patiently transferred my illegible hand-written drafts onto word processor. Dierk Polzin and Dan Skemp assisted me with the creation of the page masters and the subject index and Christopher Collimore with the author index.
Download or read book Pedodiversity written by Juan José Ibáñez and published by CRC Press. This book was released on 2013-04-08 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil diversity (pedodiversity) is part of our natural and cultural heritage. The preservation of the pedosphere is essential for the protection of the biosphere and the Earth's systems, the regulation of climate, and for world food security. In this book, reputed international experts discuss the state of the art of pedodiversity analysis-analyzing
Book Synopsis Viruses of Potatoes and Seed-potato Production by : J. A. de Bokx
Download or read book Viruses of Potatoes and Seed-potato Production written by J. A. de Bokx and published by . This book was released on 1987 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Characterization and identification of potato viruses and viroids; Viruses, viroids, mycoplasmas and diseases with a virus-like; Viruses and potatoes.
