Download or read book Irrigation in Africa in Figures written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 1995 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Banana Genomics and Transgenic Approaches for Genetic Improvement written by Sukhada Mohandas and published by Springer. This book was released on 2016-09-08 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bananas and plantains are among the most important food and cash crops in the world. They are cultivated in more than 135 countries, across the tropics and subtropics, with an annual global production of ca. 130 million metric tonnes. Though bananas are one of the most important components of food security in many developing countries, banana production is threatened by both abiotic and biotic stresses. These include a wide range of diseases and pests, such as bunchy top virus, burrowing nematodes, black Sigatoka or black leaf streak, Fusarium wilt, etc. In recent years, considerable progress has been made and several biotechnological and genomic tools have been employed to help understand and unravel the mysterious banana genome. Molecular and genomic studies have helped to decipher the Musa genome and its evolution. Genetic linkage map and whole genome sequencing of both Musa acuminata and Musa balbisiana (progenitors of cultivated banana) have completely changed the way of thinking and the approach on banana crop improvement. Whole-genome sequencing has helped to improve the selection of quantitative traits such as yield, as well as the selection of optimal parents for developing required hybrids in breeding programs. Gene isolation and the analysis of mutants have helped in the characterization of genes of agronomic value and the associated regulatory sequences. With the advent of molecular markers and new statistical tools, it is now possible to measure the diversity, identify genes and useful alleles linked to important agronomic traits. Further these alleles can be incorporated into cultivars through marker assisted selection or through transgenic approach. Transgenic approaches are potential tools for direct transfer of these genes into popular cultivars, which are generally not amenable for conventional breeding techniques, in specific with crops such as bananas which are sterile, triploid and heterozygous thereby making it difficult to reconstruct the recurrent genotypes in banana. Transgenic techniques thus have helped overcome the difficulty of working with sterile, triploid banana crop. In the last five years, enormous amount of new information and techniques have been generated for banana. A comprehensive book entitled “Banana: Genomics and Transgenic Approaches for Genetic improvement” on banana genomics, latest transgenic technologies and tools available for improved crop development in banana will address all these requirements.

Download or read book Fragments for a History of the Human Body written by Michel Feher and published by Zone Books. This book was released on 1989 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The first approach can be called vertical since what is explored here is the human body's relationship to the divine, to the bestial and to the machines that imitate or simulate it. The second approach covers the various junctures between the body's "outside" and "inside": it can therefore be called a "psychosomatic" approach, studying the manifestation - or production - of soul and the expression of emotions through the body's attitudes, and, on another level, the speculations inspired by cenesthesia, pain and death. Finally, the third approach ... brings into play the classical opposition between organ and function by showing how a certain organ or bodily substance can be used to justify or challenge the way human society functions ..." - foreword Part 3.

Download or read book Conservation and Sustainable Development written by Jonathan Davies and published by IDRC. This book was released on 2012 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Linking Practice and Policy in Eastern Africa.

Download or read book The Healing Forest written by Richard Evans Schultes and published by Timber Press (OR). This book was released on 1990 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1516 species and variants are ethnopharmacologically described

Download or read book Freshwater Quality written by P. J. Boon and published by . This book was released on 1997 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a conference organized by the Research and Advisory Services Directorate of Scottish Natural Heritage, this text provides an account of current interpretations of freshwater quality. It describes a range of techniques for its evaluation, and discusses ways in which the principles of quality assessment can be applied.

Download or read book Estimating Biomass and Biomass Change of Tropical Forests written by Sandra Brown and published by Food & Agriculture Org.. This book was released on 1997 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Crop Improvement written by Khalid Rehman Hakeem and published by Springer Science & Business Media. This book was released on 2013-06-13 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: The improvement of crop species has been a basic pursuit since cultivation began thousands of years ago. To feed an ever increasing world population will require a great increase in food production. Wheat, corn, rice, potato and few others are expected to lead as the most important crops in the world. Enormous efforts are made all over the world to document as well as use these resources. Everybody knows that the introgression of genes in wheat provided the foundation for the “Green Revolution”. Later also demonstrated the great impact that genetic resources have on production. Several factors are contributing to high plant performance under different environmental conditions, therefore an effective and complementary use of all available technological tools and resources is needed to meet the challenge.

Download or read book Plant Animal Communication written by H. Martin Schaefer and published by OUP Oxford. This book was released on 2011-04-07 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Communication is an essential factor underpinning the interactions between species and the structure of their communities. Plant-animal interactions are particularly diverse due to the complex nature of their mutualistic and antagonistic relationships. However the evolution of communication and the underlying mechanisms responsible remain poorly understood. Plant-Animal Communication is a timely summary of the latest research and ideas on the ecological and evolutionary foundations of communication between plants and animals, including discussions of fundamental concepts such as deception, reliability, and camouflage. It introduces how the sensory world of animals shapes the various modes of communication employed, laying out the basics of vision, scent, acoustic, and gustatory communication. Subsequent chapters discuss how plants communicate in these sensory modes to attract animals to facilitate seed dispersal, pollination, and carnivory, and how they communicate to defend themselves against herbivores. Potential avenues for productive theoretical and empirical research are clearly identified, and suggestions for novel empirical approaches to the study of communication in general are outlined.

Download or read book A Model of Growth Through Creative Destruction written by Philippe Aghion and published by London : Department of Economics, University of Western Ontario. This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper develops a model based on Schumpeter's process of creative destruction. It departs from existing models of endogenous growth in emphasizing obsolescence of old technologies induced by the accumulation of knowledge and the resulting process or industrial innovations. This has both positive and normative implications for growth. In positive terms, the prospect of a high level of research in the future can deter research today by threatening the fruits of that research with rapid obsolescence. In normative terms, obsolescence creates a negative externality from innovations, and hence a tendency for laissez-faire economies to generate too many innovations, i.e too much growth. This "business-stealing" effect is partly compensated by the fact that innovations tend to be too small under laissez-faire. The model possesses a unique balanced growth equilibrium in which the log of GNP follows a random walk with drift. The size of the drift is the average growth rate of the economy and it is endogenous to the model ; in particular it depends on the size and likelihood of innovations resulting from research and also on the degree of market power available to an innovator.

Download or read book On the Origin of Species written by Charles Darwin and published by Xist Publishing. This book was released on 2016-03-24 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: On the Origin of Species by Charles Darwin from Coterie Classics All Coterie Classics have been formatted for ereaders and devices and include a bonus link to the free audio book. “One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.”― Charles Darwin, The Origin of Species In On the Origin of Species, Charles Darwin set out his theory of evolution, natural selection, and survival of the fittest.

Download or read book Trees of Panama and Costa Rica written by Richard Condit and published by Princeton University Press. This book was released on 2010-11-08 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first field guide dedicated to the diverse tree species of Panama and Costa Rica. Featuring close to 500 tropical tree species, Trees of Panama and Costa Rica includes superb color photos, abundant color distribution maps, and concise descriptions of key characteristics, making this guide readily accessible to botanists, biologists, and casual nature lovers alike. The invaluable introductory chapters discuss tree diversity in Central America and the basics of tree identification. Family and species accounts are treated alphabetically and describe family size, number of genera and species, floral characteristics, and relative abundance. Color distribution maps supplement the useful species descriptions, and facing-page photographic plates detail bark, leaf, flower, or fruit of the species featured. Helpful appendices contain a full glossary, a comprehensive guide to leaf forms, and a list of families not covered. The only tree guide to cover both Panama and Costa Rica together Covers almost 500 species 438 high-resolution color photos 480 color distribution maps and two general maps Concise and jargon-free descriptions of key characteristics for every species Full glossary and guide to leaf forms included

Download or read book The Dispersal of Plants Throughout the World written by Henry N. Ridley and published by . This book was released on 1990 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluaci n de la contaminaci n en Ecosistemas Acu ticos written by Enrique Javier Peña Salamanca and published by Universidad del Valle. This book was released on 2012-09-19 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Este libro reúne los principales resultados del proyecto de investigación "Efectos de la contaminación por metales en la Ultraestructura Celular de la Biota Acuática y Poblaciones Humanas Asociadas a la Laguna de Sonso en el Valle del Cauca"; ejecutado por la Universidad del Valle, la Universidad Autónoma de Occidente y la Universidad del Cauca, con la cofinanciación de Colciencias. El propósito de la publicación es documentar los principales problemas ambientales a los que se exponen estos ecosistemas acuáticos, haciendo énfasis en la contaminación por metales pesados, sus causas y consecuencias, incorporando además principios metodológicos para su evaluación y monitoreo. El libro describe la situación ambiental de la Laguna de Sonso, como un estudio de caso en el Valle del Cauca, enumerando igualmente sus atributos ecológicos y planteando una serie de métodos importantes para el estudio de los ecosistemas acuáticos continentales en el país. A partir de la estructura planteada en esta publicación, se pretende que el documento aporte elementos conceptuales y metodológicos claves para la conservación y manejo de estos ecosistemas acuáticos. De igual manera, que las ideas desarrolladas en los estudios referidos puedan generar una agenda de trabajo con todos los actores relacionados con el uso de estos recursos hidrobiológicos para rescatar la riqueza que guardan los sistemas de humedales en la cuenca alta del río Cauca. A partir de la estructura planteada en esta publicación, se pretende que el documento aporte elementos conceptuales y metodológicos claves para la conservación y manejo de estos ecosistemas acuáticos. De igual manera, que las ideas desarrolladas en los estudios referidos puedan generar una agenda de trabajo con todos los actores relacionados con el uso de estos recursos hidrobiológicos para rescatar la riqueza que guardan los sistemas de humedales en la cuenca alta del río Cauca.

Download or read book Behaviour and Management of European Ungulates written by Rory Putman and published by Whittles. This book was released on 2014-10-13 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ungulates are an extraordinarily important group of animals worldwide. In many cases, they are keystone species with a disproportionate effect on the functioning of the wider ecological systems of which they form a part. They can also serve as dominant species acting as ecological engineers and as a prey base for endangered or expanding populations of large carnivores. They are important culturally and economically, as a major source of protein in subsistence cultures and because of their wide exploitation in recreational hunting, which is still a major form of land use in many countries. The book considers a number of aspects of the balance of cost and benefit of ungulates and their management in Europe. Through a synthesis of the underlying biology and a comparison of the management techniques adopted in different countries, management approaches which seem effective within their respective circumstances are explored. Each chapter is written by experts in their own fields, ensuring that they are aware of the most up-to-date literature on that topic and can also offer an experienced and informed review based on their own research experience.

Download or read book Determinaci n y comunicaci n del Sistema de Gesti n Ambiental SGA SEAG0211 written by Estefanía Torreblanca Fernández and published by IC Editorial. This book was released on 2023-07-24 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: Libro especializado que se ajusta al desarrollo de la cualificación profesional y adquisición del certificado de profesionalidad "SEAG0211 - GESTIÓN AMBIENTAL". Manual imprescindible para la formación y la capacitación, que se basa en los principios de la cualificación y dinamización del conocimiento, como premisas para la mejora de la empleabilidad y eficacia para el desempeño del trabajo.

Download or read book Mule and Black tailed Deer of North America written by Olof C. Wallmo and published by . This book was released on 1981 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developed in co-operation with U.S. Department of Agriculture, Forest Service.