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Sensibilidade Da Cana De Acucar Saccharum Spp Ao Excesso De Agua No Solo
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Book Synopsis Sensibilidade da cana-de-açúcar (Saccharum spp.) ao excesso de água no solo by :
Download or read book Sensibilidade da cana-de-açúcar (Saccharum spp.) ao excesso de água no solo written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Praticamente toda cana-de-açúcar produzida no Estado de São Paulo é cultivada em condições de sequeiro e o aproveitamento de novas áreas para a sua produção, nas quais haja necessidade de drenagem, torna-se importante. O dimensionamento de sistemas de drenagem agrícola baseado apenas na experiência prática do projetista tem levado a freqüentes insucessos. Para o dimensionamento racional, é necessário se conhecer a velocidade mínima de rebaixamento do lençol freático a ser proporcionado pelos drenos, o que depende da sensibilidade de cada cultura. Assim, este trabalho tem como objetivos determinar o efeito de diferentes velocidades de rebaixamento do NF, em diferentes estádios de desenvolvimento da cana-de-açúcar. O experimento foi conduzido em 64 lisímetros, em um delineamento experimental de blocos casualizados, arranjado em um fatorial de (3 x 5 + 1), sendo 3 estádios de desenvolvimento, 5 velocidades de rebaixamento do NF mais uma testemunha que não sofrerá estresse por excesso de umidade. Os resultados obtidos permitiram a obtenção de um critério de drenagem para o cálculo do espaçamento de drenos utilizando equações de movimento não permanente. A produtividade e seus componentes expressos em valores médios de massa verde de colmos, massa seca dos colmos, massa verde dos ponteiros, massa seca dos ponteiros, massa verde total e massa seca total não foram afetados pelas velocidades de rebaixamento de 0,30 m em 3, 6, 9, 12 e 15 dias. Entre os índices fisiológicos avaliados a condição de inundação das parcelas proporcionada pelas diferentes velocidades de rebaixamento do NF não interferiu nos valores médios da taxa de crescimento absoluto, taxa de assimilação liquida e na taxa de crescimento da cultura. Já a razão de área foliar, a taxa de crescimento relativo, e área foliar especifica apresentaram diferenças significativas para os períodos. O valor médio de Brix obtidos nas plantas que sofreram estresse pelo encharcamento no período de 305 DAP sob uma velocidade re.
Book Synopsis Efeito da tensão da água do solo na cultura da cana de açúcar (Saccharum spp.). by : J. A. G. C. Sousa
Download or read book Efeito da tensão da água do solo na cultura da cana de açúcar (Saccharum spp.). written by J. A. G. C. Sousa and published by . This book was released on 1976 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tem como principal objetivo investigar o comportamento da cultura da cana de açúcar submetida a diferentes niveis de tensão de água no solo, com vistas as produções de cana (colmos) e açúcar, consumo de água e desenvolvimento vegetativo.
Book Synopsis Efeitos das adubacoes verde e mineral sobre a cana-de-acucar (Saccharum spp) cultivada em solo de cerrado by : M. Fazolin
Download or read book Efeitos das adubacoes verde e mineral sobre a cana-de-acucar (Saccharum spp) cultivada em solo de cerrado written by M. Fazolin and published by . This book was released on 1982 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sugarcane Bioethanol by : Luís Augusto Barbosa Cortez
Download or read book Sugarcane Bioethanol written by Luís Augusto Barbosa Cortez and published by . This book was released on 2010 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Brazil, sugarcane ethanol supplied, in 2009, 17.6 % of the energy for land transportation (excluding railroads)and about 55% of the total energy supplied by liquid fuel for Otto cycle engines. Besides the lower production costs ethanol produced from sugarcane in Brazil has another important advantage: in Central-South Brazil only 1 unit of fossil energy is used for each 8-9 units of energy produced by ethanol from sugarcane. Carbon emissions reduction also benefits from sugarcane ethanol: for each cubic meter of ethanol used as fuel, there is net saving of around 2 t CO2 not emitted to the atmosphere while, at the same time, no SO2 is emitted. Sugarcane was introduced in Brazil in 1532. The "Brazilian model" of producing concomitantly sugar and ethanol, brought important technical benefits and made possible an outstanding increase in the competitiveness in the international market for sugar and ethanol. Today about 50% of the sucrose of sugarcane produced in the country is directed to the production of sugar while another half is used to produce Ethanol. Industrial and academic R&D has helped to increase the productivity of ethanol steadily over the past 35 years, at a rate of 3.2% per year. Productivity gains implied savings of planted area by a factor of 2.6. In 2009/2010 the area planted with sugarcane for Ethanol production was 4.2 Mha, amounting to 1% of the total arable land available in Brazil. About 60% of the Ethanol produced in Brazil comes from the State of Sao Paulo, where the productivity is the highest (around 86 t/ha.year). Most of the recent expansion is happening in the center-west region of the country, in degraded pasture lands. The FAPESP Program for Research on Bioenergy, BIOEN, aims at articulating public and private R&D, using academic and industrial laboratories to advance and apply knowledge in fields related to ethanol production in Brazil. The BIOEN Program has a solid core for supporting academic exploratory research activities that will generate new knowledge and form scientists and professionals essential for advancing industry capacity in ethanol related technologies. On top of this, BIOEN includes partnerships with industry for cooperative R&D activities between industrial and academic laboratories, which are to be co-funded by FAPESP and industry.Federal agencies, such as CNPq, will also co-fund the research.
Book Synopsis Increasing Student Motivation by : Margaret A.Theobald
Download or read book Increasing Student Motivation written by Margaret A.Theobald and published by Corwin Press. This book was released on 2005-09-16 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique resource provides a wealth of theories and strategies for teachers to help spark students' motivations to learn and succeed beyond their formal schooling years.
Book Synopsis Land Use and Water Resources by : Charles Pereira
Download or read book Land Use and Water Resources written by Charles Pereira and published by Cambridge University Press. This book was released on 1973-05-03 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Food and Agriculture Organization of the United Nations. Soil Resources, Management, and Conservation Service Publisher :Food & Agriculture Org. ISBN 13 :9789251038901 Total Pages :92 pages Book Rating :4.0/5 (389 download)
Book Synopsis Agro-ecological Zoning by : Food and Agriculture Organization of the United Nations. Soil Resources, Management, and Conservation Service
Download or read book Agro-ecological Zoning written by Food and Agriculture Organization of the United Nations. Soil Resources, Management, and Conservation Service and published by Food & Agriculture Org.. This book was released on 1996 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geostatistics for Environmental Scientists by : Richard Webster
Download or read book Geostatistics for Environmental Scientists written by Richard Webster and published by John Wiley & Sons. This book was released on 2007-10-22 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geostatistics is essential for environmental scientists. Weather and climate vary from place to place, soil varies at every scale at which it is examined, and even man-made attributes – such as the distribution of pollution – vary. The techniques used in geostatistics are ideally suited to the needs of environmental scientists, who use them to make the best of sparse data for prediction, and top plan future surveys when resources are limited. Geostatistical technology has advanced much in the last few years and many of these developments are being incorporated into the practitioner’s repertoire. This second edition describes these techniques for environmental scientists. Topics such as stochastic simulation, sampling, data screening, spatial covariances, the variogram and its modeling, and spatial prediction by kriging are described in rich detail. At each stage the underlying theory is fully explained, and the rationale behind the choices given, allowing the reader to appreciate the assumptions and constraints involved.
Book Synopsis Remote Sensing of the Environment by : John R. Jensen
Download or read book Remote Sensing of the Environment written by John R. Jensen and published by . This book was released on 2013-07-23 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: For one-semester courses in Introductory Remote Sensing as well as Introductory Airphoto Interpretation. This widely adopted book introduces the fundamentals of remote sensing from an earth resource (versus engineering) perspective. Emphasis is on turning remote sensing data into useful spatial biophysical or socio-economic information that can be used to make decisions.
