Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Estudio Del Efecto Combinado De Tres Criterios De Riego Y Seis Dosis De Fertilizante Nitrogenado Al Suelo En La Produccion De Maiz Zea Mays L full books in PDF, epub, and Kindle. Read online Estudio Del Efecto Combinado De Tres Criterios De Riego Y Seis Dosis De Fertilizante Nitrogenado Al Suelo En La Produccion De Maiz Zea Mays L ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author :
Publisher :
ISBN 13 :
Total Pages : 756 pages
Book Rating : 4.E/5 ( download)
Download or read book Agrindex written by and published by . This book was released on 1980 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ricard Poch Massegú
Publisher :
ISBN 13 :
Total Pages : 412 pages
Book Rating : 4.:/5 (112 download)
Download or read book Riego y fertilización nitrogenada en maíz (zea mays l.): efecto sobre el rendimiento del cultivo y la contaminación subterránea por nitratos written by Ricard Poch Massegú and published by . This book was released on 2013 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'agricultura intensiva normalment porta associades conseqüències sobre el medi ambient. Aquest és el cas de l'àrea d'estudi de la present tesi doctoral: l'Empordà, una regió amb gran varietat de cultius intensius (fruiters, cereals, farratges,...) i amb problemes manifestos de contaminació d'aigües subterrànies per nitrats l'origen dels quals apunta, també, a les pràctiques agrícoles de la zona.El treball realitzat s'ha centrat en el monocultiu de blat de moro per a producció de gra amb reg per superfície en solcs i amb fertilització nitrogenada mineral. En aquest marc, s'han definit com a objectius (1) avaluar la influència que el reg i la fertilització nitrogenada tenen sobre la producció i l'impacte ambiental (contaminació subterrània per nitrats) i (2) avaluar i aplicar codis de simulació que permetin aprofundir en el coneixement del sistema de reg i el maneig del cultiu a la zona.S'ha plantejat un assaig experimental de dos anys de durada sobre la mateixa parcel·la experimental. En ella s'han configurat cinc mòduls de reg de 8 solcs cadascun per a l'avaluació del comportament del reg. Sobre aquests mòduls s'ha sembrat blat de moro i s'han definit cinc tractaments diferents (amb tres repeticions cadascun) fruit de la interacció de tres dosis de fertilitzant mineral nitrogenat (0, 210 i 500 kg N/ha) i dos tipus de fertilitzant: convencional (amb aplicacions de fons i de cobertora) i d'alliberació gradual (amb una aplicació de fons). El maneig del cultiu s'ha realitzat segons les pràctiques habituals de la regió.La parcel·la experimental s'ha monitoritzat i s'han pres mostres intensivament per a fer un seguiment i quantificar totes les variables que han influït en el comportament del reg i en la resposta agronòmica del cultiu als tractaments realitzats. Amb aquesta informació s'han calibrat i/o validat els codis de simulació RAIEOPT, EVASUP2, SIMRAIE, SIRMOD, LIXIM, HYDRUS i STICS.De l'anàlisi dels resultats obtinguts, sobre el sistema de reg per superfície es conclou que: (1) que el primer reg es comporta de forma molt diferent a la resta de regs de la campanya; (2) que les condicions del medi on es desenvolupa el reg són variables (secció transversal del solc, infiltració, compactació i rugositat del sòl) i influeixen en el comportament del reg; (3) que les dosis totals d'aigua aplicades no han superat en cap cas el 75% de les necessitats teòriques del cultiu; (4) que els codis de simulació que millor reflecteixen el comportament del reg observat són el RAIEOPT pel càlcul de la funció mitjana d'infiltració en solcs i el SIMRAIE per preveure les dosis d'aigua infiltrades al llarg del solc de reg; i (5) que, en les condicions experimentades, els perfils de les dosis d'aigua infiltrades al llarg dels solcs són pràcticament horitzontals.En quant a la resposta del cultiu als escenaris experimentals realitzats es conclou que: (1) el tractament sense aportació de fertilitzant nitrogenat té un rendiment en producció de gra de prop del 40% menor que la resta de tractaments; (2) no s'observen diferències en els índexs de rendiment del cultiu entre els tractaments amb alguna aportació de fertilitzant mineral nitrogenat; (3) les pèrdues de nitrogen per lixiviació van associades a períodes dedrenatge i són proporcionals al nitrogen present en el sòl a l'inici d'aquests períodes; i (4) no s'ha produït drenatge durant els períodes de reg assajats.Finalment, sobre la simulació del sistema sòl-planta-atmosfera amb el codi STICS es conclou que: (1) STICS és una eina útil de simulació del sistema agrícola en escenaris amb i sense cultiu; i (2) STICS tendeix a sobreestimar els risc de lixiviació de nitrats observat en parcel·la.
Author : Wilfredo Feliciano Neyra Reyes
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Efecto del humus de lombriz y el bioabono frente los fertilizantes químicos en el cultivo de maíz (Zea mays): Estudio comparativo written by Wilfredo Feliciano Neyra Reyes and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Las plantas, al igual que los demás seres vivientes, necesitan de nutrientes para poder vivir. Ellas obtienen sus elementos nutritivos de tres fuentes: aire, agua y suelo. Del aire extraen el carbono mediante la función clorofiliana, y parte del oxigeno, mediante la respiración. Del suelo obtienen una parte apreciable del carbono y nitrógeno. El nitrógeno lo toma en forma de nitratos, sales amónicas y, algunos casos, de combinaciones orgánicas; el potasio, fosforo, calcio, etc., los toma de sus sales respectivas disueltas en el agua del suelo o del complejo arcillo-húmico por intercambio de los minerales.
Author : Stephen R. Gliessman
Publisher : CRC Press
ISBN 13 : 9781575040431
Total Pages : 420 pages
Book Rating : 4.0/5 (44 download)
Download or read book Agroecology written by Stephen R. Gliessman and published by CRC Press. This book was released on 1998 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents powerful arguments against "Environmental Racism", "Incrementalism" and the "Impotence of Planning." Explores case studies of urban planning, county policies, residential development and more. Submits the authors recommendations for preserving the delicate balance of Floridas ecosystem.
Author : Barry Nestel
Publisher :
ISBN 13 :
Total Pages : 147 pages
Book Rating : 4.:/5 (476 download)
Download or read book Cassava as Animal Feed written by Barry Nestel and published by . This book was released on 1977 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : M.H. Zimmermann
Publisher : Springer Science & Business Media
ISBN 13 : 3642661610
Total Pages : 548 pages
Book Rating : 4.6/5 (426 download)
Download or read book Transport in Plants I written by M.H. Zimmermann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: When WILHELM RUHLAND developed his plan for an Encyclopedia of Plant Physiol ogy more than three decades ago, biology could still be conveniently subdivided into classical areas. Even within plant physiology, subdivisions were not too difficult to make, and general principles could be covered sufficiently in the two introductory volumes of the Encyclopedia on the physical and chemical basis of cell biology. But the situation changed rapidly even during the 12-year publication period of the Encyclopedia (1955-1967). The new molecular direction of genetics and structural research on biopolymers had an integrating effect on all other biological fields, including plant physiology, and it became increasingly difficult to keep previously distinct areas separated. RUHLAND'S overall plan included 18 volumes and about 22,000 pages. It covered the entire field of plant physiology, in most cases from the very beginning. But, as each volume appeared, it was clear that its content would soon be outdated.
Author : Gary Paul Nabhan
Publisher : University of Arizona Press
ISBN 13 : 9780816522590
Total Pages : 260 pages
Book Rating : 4.5/5 (225 download)
Download or read book Enduring Seeds written by Gary Paul Nabhan and published by University of Arizona Press. This book was released on 2002-10 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: As biological diversity continues to shrink at an alarming rate, the loss of plant species poses a threat seemingly less visible than the loss of animals but in many ways more critical. In this book, one of America's leading ethnobotanists warns about our loss of natural vegetation and plant diversity while providing insights into traditional Native agricultural practices in the Americas. Gary Paul Nabhan here reveals the rich diversity of plants found in tropical forests and their contribution to modern crops, then tells how this diversity is being lost to agriculture and lumbering. He then relates "local parables" of Native American agriculture—from wild rice in the Great Lakes region to wild gourds in Florida—that convey the urgency of this situation and demonstrate the need for saving the seeds of endangered plants. Nabhan stresses the need for maintaining a wide gene pool, not only for the survival of these species but also for the preservation of genetic strains that can help scientists breed more resilient varieties of other plants. Enduring Seeds is a book that no one concerned with our environment can afford to ignore. It clearly shows us that, as agribusiness increasingly limits the food on our table, a richer harvest can be had by preserving ancient ways. This edition features a new foreword by Miguel Altieri, one of today's leading spokesmen for sustainable agriculture and the preservation of indigenous farming methods.
Author : Piet Lens
Publisher : IWA Publishing
ISBN 13 : 1843391007
Total Pages : 545 pages
Book Rating : 4.8/5 (433 download)
Download or read book Soil and Sediment Remediation written by Piet Lens and published by IWA Publishing. This book was released on 2005-09-30 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil and Sediment Remediation discusses in detail a whole set of remediative technologies currently available to minimise their impact. Technologies for the treatment of soils and sediments in-situ (landfarming, bioscreens, bioventing, nutrient injection, phytoremediation) and ex-situ (landfarming, bio-heap treatment, soil suspension reactor) will be discussed. The microbiological, process technological and socio-economical aspects of these technologies will be addressed. Special attention will be given to novel biotechnological processes that utilise sulfur cycle conversions, e.g. sulfur and heavy metal removal from soils. Also the potential of phytoremediation will be highlighted. In addition, treatment schemes for the clean-up of polluted megasites, e.g. harbours and Manufactured Gaswork Plants (MGP), will be elaborated. The aim of Soil and Sediment Remediation is to introduce the reader in: the biogeochemical characteristics of soil and sediments- new techniques to study soil/sediment processes (molecular probes, microelectrodes, NMR) clean up technologies for soils polluted with organic (PAH, NAPL, solvents) or inorganic (heavy metals) pollutants- preventative and remediative strategies and technologies available in environmental engineering novel process applications and bioreactor designs for bioremediation the impact of soil pollution on society and its economic importance.
Author : Paul Gepts
Publisher : Cambridge University Press
ISBN 13 : 110737667X
Total Pages : pages
Book Rating : 4.1/5 (73 download)
Download or read book Biodiversity in Agriculture written by Paul Gepts and published by Cambridge University Press. This book was released on 2012-02-23 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The introduction of plant and animal agriculture represents one of the most important milestones in human evolution. It contributed to the development of cities, alphabets, new technologies, and ultimately to civilizations, but it has also presented a threat to both human health and the environment. Bringing together research from a range of fields including anthropology, archaeology, ecology, economics, entomology, ethnobiology, genetics and geography, this book addresses key questions relating to agriculture. Why did agriculture develop and where did it originate? What are the patterns of domestication for plants and animals? How did agroecosystems originate and spread from their locations of origin? Exploring the cultural aspects of the development of agricultural ecosystems, the book also highlights how these topics can be applied to our understanding of contemporary agriculture, its long-term sustainability, the co-existence of agriculture and the environment, and the development of new crops and varieties.
Author : Great Britain
Publisher :
ISBN 13 : 9780111531877
Total Pages : 72 pages
Book Rating : 4.5/5 (318 download)
Download or read book The Employment and Support Allowance Regulations 2013 written by Great Britain and published by . This book was released on 2012-12-10 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Enabling power: Welfare Reform Act 2007, ss. 2 (1) (a) (c) (4) (a) (c), 3 (1) (c) (2) (b) (d) (3), 8 (1) to (3) (4) (a) (b) (5) (6), 9 (1) to (3) (4) (a) (b), 11A (5), 11B (2) (3), 11D (2) (d), 11E (1), 11H (5) (6), 11J (3) (4) (8), 17 (1) (2) (3) (a) (b), 18 (1) (2) (4), 20 (2) to (7), 24 (1) (2) (b) (3), 25 (2) to (5), sch. 1, paras 1 (3) (4), 3 (2), 4 (1) (a) (c) (3) (4), sch. 2, paras 1 to 4A, 5, 6, 9, 10 & Social Security Administration Act 1992, ss. 5 (1A), 189 (4) to (6), 191 & Social Security Act 1998, s. 21 (1) (a) & Welfare Reform Act 2012, sch. 5, paras 2 (3), 3. Issued: 10.12.2012. Made: -. Laid: -. Coming into force: 29.04.2013. Effect: None. Territorial extent & classification: E/W/S. For approval by resolution of each House of Parliament
Author : Allison Williams
Publisher : Routledge
ISBN 13 : 1317010809
Total Pages : 399 pages
Book Rating : 4.3/5 (17 download)
Download or read book Therapeutic Landscapes written by Allison Williams and published by Routledge. This book was released on 2017-05-15 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: The therapeutic landscape concept, first introduced early in the 1990s, has been widely employed in health/medical geography and gaining momentum in various health-related disciplines. This is the first book published in several years, and provides an introduction to the concept and its applications. Written by health/medical geographers and anthropologists, it addresses contemporary applications in the natural and built environments; for special populations, such as substance abusers; and in health care sites, a new and evolving area - and provides an array of critiques or contestations of the concept and its various applications. The conclusion of the work provides a critical evaluation of the development and progress of the concept to date, signposting the likely avenues for future investigation.
Author : M. H. Fulekar
Publisher : CRC Press
ISBN 13 : 1498726259
Total Pages : 310 pages
Book Rating : 4.4/5 (987 download)
Download or read book Environmental Nanotechnology written by M. H. Fulekar and published by CRC Press. This book was released on 2017-10-30 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental nanotechnology is considered to play a key role in shaping of current environmental engineering and science practices. This book titled "Environmental Nanotechnology" covers the advanced materials, devices, and system development for use in the environmental protection. The development of nano-based materials, understanding their chemistry and characterization using techniques like X- Ray diffraction, FT-IR, EDX, scanning electron microscope (SEM), transmission electron microscope (TEM), high resolution-TEM, etc is included. It also highlights the scope for their applications in environmental protection, environmental remediation and environmental biosensors for detection, monitoring and assessment. Key Features: Covers basic to advanced Nano-based materials, their synthesis, development, characterization and applications and all the updated information related to environmental nanotechnology. Discusses implications of nanomaterials on the environment and applications of nanotechnology to protect the environment. Illustrates specific topics such as ethics of nanotechnology development, Nano-biotechnology, and application in wastewater technology. Includes applications of nanomaterials for combating global climate change and carbon sequestration. Gives examples of field applications of environmental nanotechnology. This book covers advanced materials, devices, and system developments for use in environmental protection. The development of nano-based materials, understanding its chemistry and characterization by the use of X-Ray diffraction, FT-IR, EDX, scanning electron microscope (SEM), transmission electron microscope (TEM), and high resolution-TEM give the scope for their application in environmental protection, environmental remediation, and environmental biosensors for detection, monitoring, and assessment. The green chemistry based on nano-based materials prevents pollution and controls environmental contaminants.
Author : Rainer Stegmann
Publisher : Springer Science & Business Media
ISBN 13 : 9783540417361
Total Pages : 688 pages
Book Rating : 4.4/5 (173 download)
Download or read book Treatment of Contaminated Soil written by Rainer Stegmann and published by Springer Science & Business Media. This book was released on 2001-05-22 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: The treatment of contaminated soil is a permanently relevant subject for ensuirng the quality of the environment. A wide variety of soils contaminated witht a broad range of harmful chemical compounds all around the the world, call for many different treatment strategies. Research activities focus on affordable methods offering the greatest possible effect, whilst limiting the potential side effects. This book sums up the research activities of Research Centre 188 which has cooperated with the Technical University of Hamburg-Harburg, the University of Hamburg and GKSS in Geesthacht over the last 12 years, thus greatly advancing our knowledge in this field.
Author : Linda Manzanilla
Publisher : British Archaeological Reports Oxford Limited
ISBN 13 :
Total Pages : 402 pages
Book Rating : 4.A/5 ( download)
Download or read book Studies in the Neolithic and Urban Revolutions written by Linda Manzanilla and published by British Archaeological Reports Oxford Limited. This book was released on 1987 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Juan José Ibáñez
Publisher : CRC Press
ISBN 13 : 1466582782
Total Pages : 250 pages
Book Rating : 4.4/5 (665 download)
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
Author : David B. Walden
Publisher : John Wiley & Sons
ISBN 13 :
Total Pages : 824 pages
Book Rating : 4.3/5 (97 download)
Download or read book Maize Breeding and Genetics written by David B. Walden and published by John Wiley & Sons. This book was released on 1978 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt: History; Evolution; Breeding; Diseases and insects; Endosperm; Tissue; Gene action; Cytogenetics.
Author : John Staller
Publisher : Springer
ISBN 13 : 9781489983190
Total Pages : 0 pages
Book Rating : 4.9/5 (831 download)
Download or read book Pre-Columbian Foodways written by John Staller and published by Springer. This book was released on 2014-09-02 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The significance of food and feasting to Pre-Columbian Mesoamerican cultures has been extensively studied by archaeologists, anthropologists and art historians. Foodways studies have been critical to our understanding of early agriculture, political economies, and the domestication and management of plants and animals. Scholars from diverse fields have explored the symbolic complexity of food and its preparation, as well as the social importance of feasting in contemporary and historical societies. This book unites these disciplinary perspectives — from the social and biological sciences to art history and epigraphy — creating a work comprehensive in scope, which reveals our increasing understanding of the various roles of foods and cuisines in Mesoamerican cultures. The volume is organized thematically into three sections. Part 1 gives an overview of food and feasting practices as well as ancient economies in Mesoamerica. Part 2 details ethnographic, epigraphic and isotopic evidence of these practices. Finally, Part 3 presents the metaphoric value of food in Mesoamerican symbolism, ritual, and mythology. The resulting volume provides a thorough, interdisciplinary resource for understanding, food, feasting, and cultural practices in Mesoamerica.
