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Author: Douglas Johnson
Publisher: Oxfam
ISBN: 9780855983833
Category : House & Home
Languages : en
Pages : 100
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Book Description
The book lists information that must be gathered before deciding to implement a programme.Technical information on types of seeds and tools, purchase, transport and storage are given and the importance of involving the recipients, especially women at every stage, is stressed as is the need to take a long-term approach to these inventions.
Author: Douglas Johnson
Publisher: Oxfam
ISBN: 9780855983833
Category : House & Home
Languages : en
Pages : 100
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Book Description
The book lists information that must be gathered before deciding to implement a programme.Technical information on types of seeds and tools, purchase, transport and storage are given and the importance of involving the recipients, especially women at every stage, is stressed as is the need to take a long-term approach to these inventions.
Author: Michael A. Steele
Publisher: Johns Hopkins University Press
ISBN: 1421439018
Category : Science
Languages : en
Pages : 480
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Book Description
Theimer, an accomplished ecologist.
Author: Michael Fenner
Publisher: Cambridge University Press
ISBN: 9780521653688
Category : Science
Languages : en
Pages : 276
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Book Description
What determines the number and size of the seeds produced by a plant? How often should it reproduce them? How often should a plant produce them? Why and how are seeds dispersed, and what are the implications for the diversity and composition of vegetation? These are just some of the questions tackled in this wide-ranging review of the role of seeds in the ecology of plants. The authors bring together information on the ecological aspects of seed biology, starting with a consideration of reproductive strategies in seed plants and progressing through the life cycle, covering seed maturation, dispersal, storage in the soil, dormancy, germination, seedling establishment, and regeneration in the field. The text encompasses a wide range of concepts of general relevance to plant ecology, reflecting the central role that the study of seed ecology has played in elucidating many fundamental aspects of plant community function.
Author: Yitzchak Gutterman
Publisher: Springer Science & Business Media
ISBN: 3642756980
Category : Science
Languages : en
Pages : 262
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Book Description
During germination, the most resistant stage of the life cycle - the seed - changes to the most sensitive stage, namely the seedling. Therefore, in desert plant species seed dispersal and subsequent germination in the optimum time an place place are particularly critical parameters. Discussed here are the ways and means by which desert plants have adapted through the course of evolution to their extreme environment. Two such strategies which have evolved are a) plants with relatively large and protected seeds which germinate when the chance of seedling survival is high and the risk relatively low or b) those with an opportunistic strategy: minute seeds which germinate after low rainfall under high risk for seedling survival if additional rain does not follow. Most species adopt a combination of the two mechanisms. Species have adapted both genotypically and phenotypically, both aspects of which are also discussed in this thorough text. The reader is provided with a good understanding of the complex influences on each seed traced through from initial development to germination stage regarding germination preparation and subsequent survival.
Author: F. di Castri
Publisher: Springer Science & Business Media
ISBN: 9400918763
Category : Science
Languages : en
Pages : 458
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Book Description
In view of the massive change in the area of distribution of many world biota across classical biogeographical realms, and of the drastic restructuring of the biotic components of numerous ecosystems, the Scientific Committee on Problems of the Environment (SCOPE) decided at its general Assembly in Ottawa, Canada, in 1982 to launch a project on the 'Ecology of Biological Invasions'. Several regional meetings were subsequently organized within the framework of SCOPE, in order to single out the peculiarities of the invasions that took place in each region, the behaviour of their invasive species and the invasibility of their ecosystems. Most noteworthy among such workshops were one in Australia in August 1984, one concerning North America and Hawaii in October 1984, and one dealing with southern Africa in November 1985. A leitmotiv of these workshops was that most of the invasive species to those regions were emanating from Europe and the Mediterranean Basin, inadvertently or intentionally introduced by man. It was therefore considered as a timely endeavour to organize the next regional meeting in relation to this region. The workshop on 'Biological Invasions in Europe and the Mediterranean Basin' was held in Montpellier, France, 21 to 23 May 1986, thanks to the financial support of SCOPE and of the A.W. Mellon Foundation, and the logistic facilities of the Centre National de la Recherche Scientifique (C.N .R.S.).
Author: B. B. Desai
Publisher: CRC Press
ISBN:
Category : Science
Languages : en
Pages : 648
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Book Description
Author: Robert S Gallagher
Publisher: CABI
ISBN: 1780641834
Category : Technology & Engineering
Languages : en
Pages : 317
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Book Description
The 3rd edition of Seeds: The Ecology of Regeneration in Plant Communities highlights the many advances in the field of seed ecology and its relationship to plant community dynamics that have taken place in recent years. The new edition also features chapters on seed development and morphology, seed chemical ecology, implications of climate change on regeneration by seed, and the functional role of seed banks in agricultural and natural ecosystems. The book is aimed at advanced level students and researchers in the fields of seed science, seed ecology and plant ecology.
Author: Courtney Fullilove
Publisher: University of Chicago Press
ISBN: 022645486X
Category : Business & Economics
Languages : en
Pages : 289
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Book Description
While there is enormous public interest in biodiversity, food sourcing, and sustainable agriculture, romantic attachments to heirloom seeds and family farms have provoked misleading fantasies of an unrecoverable agrarian past. The reality, as Courtney Fullilove shows, is that seeds are inherently political objects transformed by the ways they are gathered, preserved, distributed, regenerated, and improved. In The Profit of the Earth, Fullilove unearths the history of American agricultural development and of seeds as tools and talismans put in its service. Organized into three thematic parts, The Profit of the Earth is a narrative history of the collection, circulation, and preservation of seeds. Fullilove begins with the political economy of agricultural improvement, recovering the efforts of the US Patent Office and the nascent US Department of Agriculture to import seeds and cuttings for free distribution to American farmers. She then turns to immigrant agricultural knowledge, exploring how public and private institutions attempting to boost midwestern wheat yields drew on the resources of willing and unwilling settlers. Last, she explores the impact of these cereal monocultures on biocultural diversity, chronicling a fin-de-siècle Ohio pharmacist’s attempt to source Purple Coneflower from the diminishing prairie. Through these captivating narratives of improvisation, appropriation, and loss, Fullilove explores contradictions between ideologies of property rights and common use that persist in national and international development—ultimately challenging readers to rethink fantasies of global agriculture’s past and future.
Author: Douglas John Levey
Publisher: CABI
ISBN: 085199525X
Category : Science
Languages : en
Pages : 530
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Book Description
This book provides information on the historical and theoretical perspectives of biodiversity and ecology in tropical forests, plant and animal behaviour towards seed dispersal and plant-animal interactions within forest communities, consequences of seed dispersal, and conservation, biodiversity and management.
Author: David Burslem
Publisher: Cambridge University Press
ISBN: 9780521847070
Category : Science
Languages : en
Pages : 582
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Book Description
To understand how tropical ecosystems function we need to appreciate not only what plants, animals and microbes they contain, but how they interact with each other. This volume synthesizes the current state of knowledge of tropical biotic interaction, with chapters providing reviews or case studies drawn from research conducted in both Old and New World tropics, including interactions among taxa at all levels. An underlying theme of the volume is revealing the importance of the maintenance of high diversity in tropical regions.
