Die seit der Mitte dieses Jahrhunderts zunehmende Intensivierung der landwirtschaftlichen Produktion ist von hohen Einsatzen an Dungemitteln sowie an Pflanzenschutzmitteln begleitet. Im Zusammenhang mit Dungemitteln kommt den stickstoffhaltigen Dungern eine besondere oekologische und oekonomische Bedeutung zu. Die unter den Pflanzennahrstoffen besondere Bedeutung des Stickstoffs be- grundet sich vor allem darauf, dass der pflanzliche Bedarf an diesem Nahr- stoff im Vergleich zu den ubrigen Nahrstoffen am hoechsten ist. Ausgangs- gesteine von Boeden weisen einen geringen Gehalt an Stickstoff auf, wes- halb in nicht anorganisch gedungten Boeden die Mineralisierung der orga- nischen Substanz die Hauptquelle fur die anorganischen Stickstofformen Ammonium und Nitrat darstellt. Der molekulare Stickstoff der Atmo- sphare wird Pflanzen nur uber symbiontisch sowie frei lebende, zur N - 2 Fixierung befahigte, Mikroorganismen zuganglich. Ein Grossteil des Energieeinsatzes der Landwirtschaft steht mit der Erzeugung von Stick- stoffdungern in Beziehung. Verluste an Stickstoff aus dem Boden durch Auswaschung oder Verfluchtigung sind deshalb nicht nur von wesentlicher oekologischer, sondern auch von oekonomischer Relevanz. Wesentliche For- schungsanstrengungen dienten der Entwicklung von Strategien zur Redu- zierung von Dungerstickstoffverlusten. Neben einem geeigneten Appli- kationsmodus sowie -zeitpunkt des Stickstoffdungers stehen Chemikalien im Mittelpunkt des Forschungsinteresses, vor allem solche zur Hemmung des harnstoffspaltenden Enzyms Urease sowie der Nitrifikation. Entspre- chende Strategien, die dabei eingesetzten Chemikalien und deren relative Effizienz werden ebenso wie - soweit untersucht - deren Nebenwirkungen auf andere biologische Parameter im ersten Kapitel behandelt.

A book of deeply personal and lush photographs, drawings, and writing, Blue Violet is Cig Harvey's celebration of the natural world and the senses. Blue Violet is a vibrant meditation on the procession of seasons, sensory abundance, and the magic in everyday life. Part art book, botanical guide, historical encyclopedia, and poetry collection, Blue Violet is a compendium of beauty, color, and the senses. Plants, flowers, and our experience of the natural world are the threads that tie this unique book together. Exploring the five senses, Blue Violet takes the reader on a personal journey through nature and the range of human emotions. As with her previous three titles - You Look At Me Like An Emergency, Gardening at Night, and You an Orchestra You a Bomb - this book invites the reader to pause, laugh, cry, create, and become more aware of the natural world. Images and text in a variety of forms (prose poetry, recipes, lists, research pieces, diagrams) focus on immediate experience to understand the vibrancy of the senses on memory and feelings.

A complete photoguide to all the wild flowers of Britain to accompany the bestselling Complete British WIldlife. With over 1,000 main entries covering wildflowers, shrubs, aquatic plants, grasses, sedges and rushes Collins Complete Guide to British Wild Flowers is a definitive photographic reference guide for flower enthusiasts. Helpful information about habitats of wild flowers and useful tips to aid identification are included along with a botanical hotspots section detailing 100 rarer species. Comparison pages show different leaf shapes and flower clusters to enable quick and easy navigation to the right section of the book to make your identification. Detailed information on which places to visit in Britain particularly rich in flower species are also included, along with individual maps showing where each species can be found. This is the essential photographic field guide of the best wild flowers Britain has to offer.

We live in a world of seeds. From our morning toast to the cotton in our clothes, they are quite literally the stuff and staff of life: supporting diets, economies, and civilizations around the globe. Just as the search for nutmeg and pepper drove the Age of Discovery, coffee beans fueled the Enlightenment and cottonseed sparked the Industrial Revolution. Seeds are fundamental objects of beauty, evolutionary wonders, and simple fascinations. Yet, despite their importance, seeds are often seen as commonplace, their extraordinary natural and human histories overlooked. Thanks to this stunning new book, they can be overlooked no more. This is a book of knowledge, adventure, and wonder, spun by an award-winning writer with both the charm of a fireside story-teller and the hard-won expertise of a field biologist. A fascinating scientific adventure, it is essential reading for anyone who loves to see a plant grow.

Glorious flower meadows were part of our life force for 2000 years or more before we swept them away last century on the altar of progress. Is there to be no more drinking from their font of well being? This book says not. Lavishly illustrated, it describes their history and, from the few remaining examples, it shows us how beautiful they are, how rich in plants and animals. It coaches us in their creation, even in small gardens, or their restoration in larger fields. It tells of the extraordinary lives of even the most ordinary denizens, little secrets that make the meadow's world go around and the convoluted links between the many plants and animals that keep everything in balance. Their stories are woven, season-by-season, into a year in the life of two meadows, a small, garden meadow and a larger old paddock. We hear of birds that plant trees, bacteria that become plant organelles, plants that drink from other plants, plants that fool or poison insects and insects that turn the tables, ants that foster butterflies, mice that navigate by compass, snails that house bees and how all of these connections, together with the flow of energy and nutrients, result in a healthy ecosystem. The book even suggests how adults and children alike can see these things for themselves. So, read this book and help your local green space to become a meadow and revel in it.

Gardeners are inherently curious. They make note of a plant label in a botanical garden and then go home to learn more. They pick up fallen blossoms to examine them closer. They spend hours reading plant catalogues. But they are often unable to accurately name or describe their discoveries. A Botanist's Vocabulary gives gardeners and naturalists a better understanding of what they see and a way to categorize and organize the natural world in which they are so intimately involved. Through concise definitions and detailed black and white illustrations, it defines 1300 words commonly used by botanists, naturalists, and gardeners to describe plants. The terms include simple concepts like petal and sepal, some that apply only to a particular group of plants or to entire ecosystems, and others that are only visible under a microscope. The simple and accessible language and highly detailed black and white illustrations make this the perfect guide for anyone looking for a deeper appreciation of the wonderful world of plants.

A photographic masterpiece, this beautiful book is a fi tting tribute to the baobab – an extraordinary and majestic tree found principally in Madagascar, and peripherally in Africa and Australia.

The first section offers a short introduction to the classifi cation and general description of baobabs, details of their life history, biogeography, dispersal and their role in people’s lives. The second section comprises a guide to each of the eight baobab species, including a botanical description, details of their habitat, distribution and principal uses, accompanied by clear images and line drawings of the leaves, flowers, fruits and growth habit of each species.

Interesting text and lavish photographs throughout make this book irresistible for specialist botanists and lay enthusiasts alike, and it will have particular appeal for tourists too.

Mushroom guru Gary Lincoff escorts you through the cultural and culinary history of the mushroom, hunting and identifying wild mushrooms, mushroom safety, and on to preparing and serving the fungi. Stunning photographs and Lincoff's fascinating anecdotes from the field will make you an instant mycophile. Gathering edible wild food is a wonderful way to forge a connection to the Earth. Mushrooms are the ultimate local food source; they grow literally everywhere, from mountains and woodlands to urban and suburban parks to your own backyard. The Complete Mushroom Hunter, Revised will enrich your understanding of the natural world and build an appreciation for an ancient, critically relevant, and useful body of knowledge. With great expertise, Lincoff provides a complete overview of edible mushrooms: from the mushroom's earliest culinary awakening, through getting equipped for mushroom forays, to preparing and serving the fruits of the foray, wherever you live. Inside you'll find: A brief, colorful history of mushroom hunting worldwide How to get equipped for a mushroom foray A completely illustrated guide to the common wild edible mushrooms and their poisonous look-alikes, with information of psychedelic and psychotherapeutic mushrooms An illustrated guide to medicinal mushrooms Where to find your fare, and how to identify them How to prepare and serve your fungi Thirty delicious recipes Five appendices offer even more mushroom knowledge, with information on how to make mushroom artwork, mushroom cultivation, less common edible varieties, and winter hunting; plus find an essential guide to major poisonous mushrooms, symptoms of poisoning, and treatment. Whether you're just starting out with the hobby or an experienced mycophile looking to add to your collection, The Complete Mushroom Hunter, Revised is your ideal guide.

A compact guide featuring nearly 400 wild flowers of Kenya and northern Tanzania, grouped for ease of use according to colour. The book includes the most widespread and commonly encountered species as well as some unusual flowers found in more remote areas.

Plants range from hardy succulents to spectacular epiphytic orchids and shaggy mountain lobelias, each concisely presented with reference to key features and typical habitat. Additional notes indicate whether a given species has particular ecological, medicinal or cultural value.

Bring trees to life like you've never seen before as The Tree Book invites you on an enchanting and illustrated journey into the astonishingly diverse growth of woodland wildlife in the world around us.

Trees have been a part of human history from the very beginning. Used for shelter, tools, fuel, and food, they also help supply the atmosphere with oxygen and form astonishingly diverse ecosystems, as well as some of the world's most beautiful landscapes. Now the intricate world of leafy woodlands and abundant rainforests is revealed in this extensive visual guide to trees, exploring their key scientific traits and their ecological importance, as well as their enduring significance in human history and culture. From ancient oaks and great redwoods to lush banyans and imposing kapoks, The Tree Book reveals the anatomy, behaviours, and beauty of these incredible plants and habitats in detail.

A must-have volume for budding botanists, this divine nature book showcases the rich diversity of trees, combining bewildering facts about spindles, spruces and more, with dazzling landscape photography of the endless species of trees found in forests and woodland all around the globe.

Explore this fascinating book on trees to discover:

-A historical overview of the cultural influence of trees and their ecological importance
-Striking photography to accompany the profound explanations of tree biology and behaviour
-A clear and comprehensible guide to ecology from both a historical and scientific point of view.

With recent media coverage on climate change highlighting the global importance of our woodlands and rainforests, there's no better time than right now to immerse yourself in this extensive horticultural handbook for an illuminating blend of the science, culture, and history of trees dating back to the beginning of time.

Let DK plant the seed of curiosity with this fantastic forest book, and watch as it blossoms into a life-long love of ecology, proving the ideal gift for naturalists or those with a soft-spot for nature photography. Combining natural history and a scientific overview with a wider look at the history, uses, symbolism, and mythology of trees, this book is a new kind of guide to these fascinating organisms.

This fun-filled adventure handbook is bursting with ideas to help kids discover the great outdoors and get closer to nature. Created with the Royal Horticultural Society (RHS), the UK's leading gardening charity. This beautifully illustrated book is packed fun activities, handy tips and nature facts to encourage children to explore the wonderful world around them. Make a wilderness compass Grow your own herb garden Build a tepee Learn how to read a map Discover more about plants, trees and wildlife Each page is filled with inspiring ideas for discovering and exploring plants and wildlife, with exciting activities for all weathers.

The perfect season-led book to help you grow the best organic vegetables, fruit and herbs in a small urban space Many of us are trying to be more mindful in our approach to eating by choosing seasonal ingredients, and growing our own fruit and vegetables can benefit our health, the environment and even our wallet. Written over a year, City Veg is the candid account of an urban grower from her productive city plot - the size of two classic 1970s VW camper vans - with all the triumphs and minor woes that come with a small, suburban location. From planning and designing the garden in January to harvesting and using home-grown produce throughout the growing season, Cinead McTernan takes you on a personal journey that will entertain experienced growers and share plenty of practical information with newbie gardeners. With helpful growing advice, harvesting guides, tips and inspiration for garden projects, City Veg also includes quick and easy recipe ideas to help make the most of your bountiful yield.

For anyone with an interest in botany or wondering what a plant name means, this well-written book will be an indispensable guide. The Illustrated Dictionary of Southern African Plant Names is aimed at keen gardeners, plant collectors, amateur and professional botanists, academics, and many other people who wish to have an answer to the question: “What do generic plant names mean?” Without a reference book to guide you, the generic names are simply unexplained ‘names’ because they are written in botanical Latin which few people understand. This easy-to-use dictionary enables readers to find out how plants have got their names. It provides a wealth of information that opens up a new world of understanding for all plant lovers. The book has nearly 5 000 entries and will include approximately 400 beautiful full-colour photographs of plants taken by top botanical photographers. This not only gives life to the book but in many cases illustrates how these names relate to the plant. Pictures have been selected from the various regions of southern African and 24 of South Africa’s leading botanists contributed to this choice with an opening page (from A–Z). Readers who wish to know more about the lives of those individuals after whom plants were named such as Watsonia, Welwitschia and hundreds more, will be surprised but delighted to find this dictionary contains more than 900 short biographies together with some 600 images, thus conserving southern African botanical history. There are fascinating descriptions of these individuals’ contributions to science, their explorations, their achievements and tragedies. The book also provides information for those readers who want to know more about the genus, such as whether the genus is an invasive species or whether the genus name has been superseded and what the replacement name is.

The debt medicine owes to botany is not commonly appreciated. In the past, medicine relied almost entirely on plants, and even today, many western medicines are plant derived. Despite this, historians have largely neglected the study of domestic medicine, practised by the ordinary person and passed down through generations, in favour of 'official medicine'. The History of Domestic Plant Medicine brings together manuscripts, letters, diaries, personal oral interviews and other primary evidence to produce a detailed picture of the medicinal use of native plants in Britain from 1700 to the present day. Recording for posterity this neglected aspect of our heritage, it is a valuable contribution to the study of the folklore of modern Britain and a fascinating piece of social history.

Object Lessons is a series of short, beautifully designed books about the hidden lives of ordinary things. They are the things we step on without noticing and the largest organisms on Earth. They are symbols of inexplicable growth and excruciating misery. They are grouped with plants, but they behave more like animals. In their inscrutability, mushrooms are wondrous organisms. The mushroom is an ordinary object whose encounters with humans are usually limited to a couple of species prepackaged at the grocery store. This book offers mushrooms as much more than a pasta ingredient or trendy coffee alternative. It presents these objects as the firmament for life as we know it, enablers of mystical traditions, menders of minds lost to depression. But it acknowledges, too, that this firmament only exists because of death and rot. Rummaging through philosophical, literary, medical , ecological , and anthropological texts only serves to confirm what the average forager already knows: that mushrooms are to be regarded with a reverence deserving of only the most powerful entities: those who create and destroy, and thrive on both. Object Lessons is published in partnership with an essay series in The Atlantic.

Plants of Northern California is the complete guide to the rich and unique flora of Northern California. From lush riparian forests along the rivers and streams to oak woodlands, wetlands, grasslands, and the ephemeral pools known as vernal pools, this handy volume enables both amateur and professional to quickly and accurately identify Northern California plants. Descriptive text that includes blooming period, elevation, and habitat Species organized by color and family Plant characteristics in easy-to-understand terms Notes that include ethnobotanical uses, history, and other interesting facts Glossary of botanical terms

The Ozark Mountains in Missouri and Arkansas have had a long history of foraging, ever since the earliest white settlers came from the Appalachians and survived off of what they could find, trap, and hunt. Today, foraging remains a major activity among the outdoor community there, supported in large part by established buyers of local edibles such as ginseng, wild berries, and nuts. Foraging the Ozarks, written by local wilderness expert Bo Brown, highlights about a hundred commonly found edibles in the Interior Highlands, from ubiquitous herbs to endemic species. With sidebars, recipes, helpful tips, and toxin warnings throughout, Foraging the Ozarks is the only guidebook the Ozark outdoor enthusiast will need to pick it, cook it, and eat it.

A definitive and richly illustrated guide to the botanically unique area of Upper Teesdale in England’s County Durham To anyone who loves the wild flowers of Great Britain and Ireland, there are some places that beckon time and again, such as The Lizard in Cornwall, The Burren in Ireland’s County Clare and Ben Lawers in Perthshire, Scotland. Upper Teesdale in England’s County Durham must, however, be included among these jewels of our botanical heritage. This locality, which is within sight of the highest point of the Pennines, has an outstanding and special flora that has been shaped by its altitude, land-use patterns and diverse geology. Many of the plants found here are rare and localized, while others are more common and widespread, but together they form the botanically unique Teesdale Assemblage. For this reason, Upper Teesdale is a hotspot for botanists. It is also a scenically beautiful area, located within easy reach of the industrial heartlands of the north-east, and is much visited by walkers and tourists. This book offers visitors unique insights about this area and its botanical riches. Presents the first account to cover together the places, plants and people of this special area Features more than 330 stunning photographs Includes detailed profiles of 96 plants that make up the Teesdale Assemblage Offers a history of Teesdale’s botanical exploration and describes the people who live, work and study plants there today Provides an overview of environmental threats and what is required to ensure a sustainable future

"A stunning volume" (Time) and the most magnificent book on the world's trees published in years.

The publication of Remarkable Trees of the World took American audiences by storm. Now in a handsome paperback volume with flaps, Thomas Pakenham embarks on a five-year odyssey to most of the temperate and tropical regions of the world to photograph sixty trees of remarkable personality and presence: Dwarfs, Giants, Monuments, and Aliens; the lovingly tended midgets of Japan; the enormous strangler from India; and the 4,700-year "Old Methusalehs." American readers will be fascinated by Pakenham's first examination of North American trees, including the towering Redwoods of Sequoia and Yosemite, the gaunt Joshua Trees of Death Valley and the Bristlecone pines discovered in California's White Mountains.

Many of these trees were already famous—champions by girth, height, volume or age—while others had never previously been caught by the camera. Pakenham's five-year odyssey, sweating it out with a 30 pound Linhof camera and tripod, took him to most of the temperate and many of the tropical regions of the world. Although North American trees dominate this book, Pakenham also trekked to remote regions in Mexico, all over Europe, parts of Asia including Japan, northern and southern Africa, Madagascar, Australia and New Zealand.

Remarkable Trees of the World is a lavish work that will be treasured for generations by all those who marvel at nature. Color photographs throughout.

"Spectacular...the specimens photographed here are surpassingly bizarre and varied....[An] astonishing collection."—Janet Maslin, New York Times

"Informative and inspiring."—American Gardener, January/February 2003

"Pakenham captures [the trees' character] expertly in his text and photographs....truly remarkable."—The New York Review of Books, Tim Flannery, 13 March 2003

"Lush new coffee-table book chronicles... the most visually impressive trees in the world."—Discover magazine, Maia Weinstock, 1 March 2003

Flora of North America North of Mexico Volume 28 - Bryophyta, part 2 - includes treatments prepared by 44 authors covering 698 species in 206 genera classified in 48 families. Descriptions for all of the families, genera, and species are provided plus occurrence maps for species are included and 53% of the species are illustrated. Keys are included to aid in the identification of genera in families and species within the genera; an overall key to the 333 genera of mosses known from North America north of Mexico is also included. Volume 28 is the seventeenth volume to be published in the planned 30-volume Flora of North America North of Mexico series. With the publication of Volume 28, plus the earlier appearance of Volume 27 - Bryophyta, part 1 - in 2007, the treatment of mosses for the Flora area is complete. The currently known moss flora has 1402 species in 333 genera classified in 81 families. For the genera, 17 (5%) are endemic to the Flora area and 273 (19.5%) of the species are endemic with 36 (2.6%) of those considered to be of conservation concern.