Geobotany – serie
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43 produkter
43 produkter
Inbunden, Engelska, 1989
2 156 kr
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A. Background and scope of the study ...3 1. General ..." ,-, ...11 B. Abandoned and marginal agricultural grasslands ...5 2. Some equilibrium models explaining species di- 1. Definition ...5 versity ., ..., ,-..., ...11 2. Inland areas in western Europe ...6 3. Change of the steady state .. , .. , ...14 3. Ca. stal areas in western Europe ...8 4. Dispersal of plant species ..., ,- 14 C. Nature mc.nagement practices ...10 5. 'Ecotypic' diversity .. , ...15 D. Theoretical considerations on nature management 6. Patterns in plant communities ...15 with special reference to diversity ...7...,. 11 Implications for management 16 LA. Background and scope of the study (Klapp, 1965), Belgium (Van Hecke, Impens & Behaeghe, 1981) and the Netherlands (Oomes & The degradation of flora and vegetation in natural Mooi, 1981; Elberse, Van Den Bergh & Dirven, and semi-natural landscapes has become a matter 1983; Willems, 1983A).
Del 15 - Geobotany
Succession in Abandoned Fields
Studies in Central Bohemia, Czechoslovakia
Inbunden, Engelska, 1990
1 619 kr
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Old and New Fields of Old-Field Ecology In ecology, succession occupies a place similar to that of evolution in general biology. Ram6n Margalef, 1968. It was a great honor for me to have been asked by Marinus Werger to write an introductory note to this very special volume. Presumably my friends and former students in Europe felt that a few words from the New World might put the results presented in this exciting book into a somewhat broader perspective. My perspective (or retrospective), however, is neither impersonal nor original; it is an eclectic reflection of recent developments in ecology and in old-field ecology in particular. The ecological generalizations and theories of Ram6n Margalef and Eugene P. Odum, as we perceived them in Prague in the early 1970s, were for some of us so attractive and promising that we even started to believe it would not take too long until we had a truly unifying general theory of ecological succession. All that was needed - we thought - were data clarifying a few controversial issues. This is how our studies of old-field succession began in 1973. We viewed old-fields as a sort of 'Drosophila' for terrestrial ecology.
Inbunden, Engelska, 1990
2 156 kr
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Life originated and evolved in water. Later the The tropical countries where the need to under plants moved out of water, conquered the land and stand the natural ecosystems is far greater because became dominant over it. The evolution through they are under intensive pressure from develop the millennia resulted in enormous complexity of ment from a rapidly growing human population, form, tissue organisation, reproductive mechan have generally devoted much less attention to the isms and specialisation of taxa in different niches. studies of aquatic ecosystems. The Indian subconti At some stage during evolution, some plants devel nent is a well-recognised biogeographic region with oped appropriate morphological and physiological a distinct geological history, climate, soils and adaptations and reverted back to the aquatic and/ biota. It is also distinct in the history of human civilisation and cultures which have a profound bear or semi-aquatic habitat. These plants, perhaps withthe exception of a few ing on the natural ecosystems. This book is in with beautiful flowers, have attracted little atten tended to provide the state of our knowledge of the tion from mankind. The fact that humans evolved aquatic and semi-aquatic vegetation in the inland in a tropical forest or savanna environment appears freshwaters of the subcontinent. The book covers responsible for a permanent bias in human atti only the herbaceous vegetation, since there is al tudes towards land and its biota.
Inbunden, Engelska, 1992
3 231 kr
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Peatlands are fascinating ecosystems. They are Boudewijn Beltman, Jon den Held, Harm Piek, inhabited by a wealth of especially adapted plant Drs. Niek van Heijst, Drs. Hermien van Sloch- species, such as peat mosses, insectivorous teren and Dr. Taeke Stol, who participated in plants, and nitrogen-fixing shrubs. They also the early stages of the process. The help of Drs. have a 'memory' often going back thousands of G. J. Baayens in the correction of chapter 5 is years, recorded in the layers of plant remains gratefully acknowledged. accumulated underneath the present plant cover. Chapters 6 and 7 have been supported by the Many peatlands are relatively low-productive foundation 'Oecologia Trajectina', Utrecht, by and species-rich, and show vegetational gradients supplying grants made available by the 'Prins related to water chemistry. Bernhard Fonds', Amsterdam and the 'Beij- Peatlands have long been recognized for many erinck-Popping Fonds', Amsterdam. I am indeb- values.The most conspicuous values appreciated ted to Marjolein Smithuizen and Dick Smit of for the Dutch mires were probably the great the Illustration division of the faculty of Biology, potential of the large nutrient stores in peat soils University of Utrecht, for the large number of for agricultural purposes, and the high calorific drawings they produced for the book. Gerrie value of peat when used as a fuel. These values Bransen helped with the printing of the final have led to large-scale exploitation and destruc- versions of the various chapters.
Del 19 - Geobotany
Plant Geography of Korea
with an emphasis on the Alpine Zones
Inbunden, Engelska, 1993
2 156 kr
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This is the first detailed analysis of the complex and rich vegetation of the mountainous Korean peninsula, which ranges from arctic-alpine to subtropical in character, and in which more than 4500 vascular-plant species have been recorded, including many endemics. It covers both the north and south of the peninsula and, using both past and present records, identifies eight major biogeographic regions. It pays due attention to vegetation history, tracing this back to Miocene times and noting the effects of Pleistocene climatic fluctuations. More recently, detailed climatic variations from 50 B.C. are recorded, along with man's influence on vegetation patterns. Special mention is made of the present arctic-alpine communities, their structural and floristic characteristics, their origins, and their vulnerability to current global warming. Throughout the relationships between Korean vegetation communities and those present in adjacent East Asia are emphasized along with those key features which make Korean communities distinctly unique.
Inbunden, Engelska, 1993
1 619 kr
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Increased atmospheric nitrogen deposition and changes in the management of heathlands have caused a significant change in the species composition of the NW-European heathlands. This change from ericaceous towards gramineous dominance is analyzed in detail in "Heathlands: Patterns and Processes in a Changing Environment". Special emphasis is put on the effects of increased atmospheric nutrient input on nutrient cycling, competition between plant species and plant herbivore interactions. The possibilities for the long-term conservation of heathlands are discussed by considering regeneration from seed and the usefulness of mathematical management models. The book provides a synthesis of pure and applied plant ecology. It should be of interest to ecologists, biological conservationists, heathland managers and government decision makers.
Del 21 - Geobotany
Lake Veluwe, a Macrophyte-dominated System under Eutrophication Stress
Inbunden, Engelska, 1994
2 156 kr
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The structure and functioning of eutrophicated aquatic ecosystems has received considerable attention from limnologists as well as water managers in recent years. Stress has often been on pelagic food webs of deeper lakes whilst littoral systems or shallower lakes have been less thoroughly investigated. Since Dutch aquatic systems are shallow, as a rule, they form a notable exception. But here, too, the orientation was often on pelagic food webs. This study takes the water plant as prime perspective. The editors consider water plants to be the key component in shallow aquatic ecosystems. They have compiled work on one water plant species, Potamogeton pectinatus L., and from one lake, Lake Veluwe, as a typical case, and set out to explain the fluctuations in abundance of this water plant as influenced by eutrophication. A working hypothesis on the mechanism responsible for water plant decline during eutrophication was adopted and tested in a combination of field and laboratory work. A simulation model, SAGAI, for the water plant P. pectinatus was developed and proved to fit independent data.
Inbunden, Engelska, 1996
1 619 kr
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This volume combines the output of almost 15 years of research by biological and physical scientists in World Heritage area in the isolated north of Australia. It concentrates on the scientific evidence accumulated by researchers covering most aspects of the vegetation and landscape features in a region that not only includes Kakadu National Park but also valuable mineral resources. The book covers the natural features and plant diversity of the region along with controversial subjects such as fire, feral animals and weeds.
Inbunden, Engelska, 1997
1 619 kr
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There are some good reasons to start a global study of beech forests. One reason may be the importance of beech for man. In many places and in many ages, beech has played an important role in people's lives (Table 1). Already in old ages beech was useful for nuts, fuelwood and bokiz, beechwood tablets carved with runes, from which probably our word 'book' is derived. Beech still plays an important role in people's lives. Another reason for a global study of beech forests is that it lifts us above the detailed but fragmented image of a local study. My study of beech forests started out of love for these often beautiful forests, and, gradually, a small project grew into a world wide study. Table 1. Beech names. Scientific name Name Language Meaning - origin beech English bhagos (Indo-European) Fagus sylvatica do Buche, Rotbuche Gennan beuk do Dutch do bok Swedish do bog Danish do Mtre, fayard French hetre = hester (Gennanic), indicating young beeches do haya Spanish do faig Cathalan do faggio Italian do fagus Latin phagos = glutton (Greek), referring to edible nuts do fagul Romanian do buk Czech F. sylvatica subsp. orientalis kayin Turkish Fagus crenata buna Japanese unknown do sobaguri Japanese noodle chestnut (old), indicating hairy cupule- penduncles F agus japonica inubuna Japanese inferior beech Fagus spp.
Del 25 - Geobotany
Vegetation of the Arabian Peninsula
Inbunden, Engelska, 1998
2 479 kr
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This comprehensive book covers all aspects of the vegetation, phytogeography and conservation of the vast and varied region of the Arabian Peninsula. It synthesises the information available on all aspects of the flora and vegetation (including lower plants), from the mountains, sand seas, coasts, water bodies and desert plains, and includes plants of economic importance. The book contains chapters on the vegetation, ecology and phytogeography of the mountains, wadis, sand deserts, gravel plains, coasts and sabkhas. Chapters on climate and geology provide the background information for understanding the dynamics of the vegetation. A chapter on the diversity of plants gives details of the region's species richness and endemism, current threats to plant diversity, and the measures taken in the form of protected areas and legislation in each country of the Peninsula. The study should be a useful resource for students, scholars and professionals interested in Southwest Asian botany.
Inbunden, Engelska, 1999
1 619 kr
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Mongolia is an expansive land-locked country, tilted by tectonic forces to the North, that experiences extremes of continental climate. Moisture-carrying wind currents are scarce so that the land has extended highs and lows in its environment. Culturally the people are mostly nomadic, having been sustained for centuries by an economy based on domestic livestock grazing. There is a saying that, "As the noses go, so goes Mongolia", referring to the domesticated grazing noses of sheep, goats, camels, yaks or horses, and wild ungulates such as gazelles. The vast fenceless steppes of Mongolia furnish the vegetation for grazing. With such extremes in climate it is clear that the vegetation must be resilient and dynamic to cope with the dictates of its extremely harsh environments. Pollen profiles from lakes, plant macrofossils and other data over the last 15,000 years show the dynamic nature of Mongolian vegetation. Currently Mongolian society is experiencing much human-driven economic development which increases pressure on its vegetation.The Great Khural Laws of 1995 forcefully addressed such environmental concerns with the expanded establishment of National Reserves and Parks, but continued effort and vigilance must be expended to insure that Mongolian society will continue to be sustained by its vegetation. This book highlights work such as conserving and restoring plant diversity in various ecosystems and makes recommendations for sustaining the vegetation basis of the nomadic Mongolian society.
Inbunden, Engelska, 2001
1 619 kr
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The main subject of this book is the interaction between diggings created by porcupines when consuming geophytes, and their influences on annual and perennial vegetation in a desert biome. The accumulation of run-off water in diggings and depressions made by animals increases the carrying capacity of these microhabitats in the desert biome. The accumulation of run-off water does not only benefit the natural vegetation; a system of human-made depressions can be evolved to increase the catchment of the run-off water that is typical to many desert habitats, and can lead to run-off agriculture in such areas. This book should be of interest to anyone working in the fields of development of deserts from the ecological point of view, water resources, soil protection and erosion, plant ecophysiology and settlement, and agronomy. It should be helpful to students, researchers, teachers, and anyone interested in any of these areas.
Inbunden, Engelska, 2003
3 231 kr
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This title presents a detailed survey of the forest vegetation of northeast Asia, a vast, mainly boreal or cool-temperate region that includes the Russian Far East (easternmost Siberia, Kamchatka, Sakhalin and Kuril Islands), Manchuria (northeastern China and adjacent), and northern Korea and Japan. Vegetation descriptions were prepared by local and foreign vegetation scientists, partly from literature sources but also from local field experience, including the several Czech-Slovak botanical expeditions to North Korea during the 1990s. Regional integration is provided in chapters on physical conditions and biogeography, and in a chapter comparing vegetation syntaxa. Two methodologies are used: 1) Exploration and forest classification following the Sukachev school of forest types (Manchuria and Russian Far East); and 2) Forest classification by Zurich-Montpellier (Braun-Blanquet) methodology (Japan and North Korea).
Inbunden, Engelska, 2004
2 156 kr
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Plant geographical description of the area, syntaxonomy, spatial patterns, floristic richness, structure of plant communities in relation to soil properties and herbivore influence were described for a mountain region that is difficult to access. Seasonal, inter-annual, and long-term dynamics of vegetation are discussed on the base of long-term observations as well as pollen and phytolith analyses. Population biology of alpine plants is studied by combination of field observations and mathematical modelling. Plant population strategies and soil seed banks are described for alpine plants from several communities. Results of long-term ecological experiments (plant reciprocal transplantations, dominant removals, light limitation) showed the significance of competition and facilitation for community organization. Structure of soil algal and fungal communities is represented as well as mycorrhiza of alpine plants. Main animal groups (wild) history and modern nature conservation problems are discussed.
Häftad, Engelska, 2010
3 231 kr
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Peatlands are fascinating ecosystems. They are Boudewijn Beltman, Jon den Held, Harm Piek, inhabited by a wealth of especially adapted plant Drs. Niek van Heijst, Drs. Hermien van Sloch- species, such as peat mosses, insectivorous teren and Dr. Taeke Stol, who participated in plants, and nitrogen-fixing shrubs. They also the early stages of the process. The help of Drs. have a 'memory' often going back thousands of G. J. Baayens in the correction of chapter 5 is years, recorded in the layers of plant remains gratefully acknowledged. accumulated underneath the present plant cover. Chapters 6 and 7 have been supported by the Many peatlands are relatively low-productive foundation 'Oecologia Trajectina', Utrecht, by and species-rich, and show vegetational gradients supplying grants made available by the 'Prins related to water chemistry. Bernhard Fonds', Amsterdam and the 'Beij- Peatlands have long been recognized for many erinck-Popping Fonds', Amsterdam. I am indeb- values.The most conspicuous values appreciated ted to Marjolein Smithuizen and Dick Smit of for the Dutch mires were probably the great the Illustration division of the faculty of Biology, potential of the large nutrient stores in peat soils University of Utrecht, for the large number of for agricultural purposes, and the high calorific drawings they produced for the book. Gerrie value of peat when used as a fuel. These values Bransen helped with the printing of the final have led to large-scale exploitation and destruc- versions of the various chapters.
Häftad, Engelska, 2010
1 619 kr
Skickas inom 10-15 vardagar
Increased atmospheric nitrogen deposition and changes in the management of heathlands have caused a significant change in the species composition of the NW-European heathlands. This change from ericaceous towards gramineous dominance is analysed in detail in Heathlands: Patterns and Processes in a Changing Environment. Special emphasis is put on the effects of increased atmospheric nutrient input on nutrient cycling, competition between plant species and plant--herbivore interactions. The possibilities for the long-term conservation of heathlands are discussed by considering regeneration from seed and the usefulness of mathematical management models. The book provides a synthesis of pure and applied plant ecology. It is vital reading for plant ecologists, biological conservationists, heathland managers and government decision makers.
Häftad, Engelska, 2010
1 619 kr
Skickas inom 10-15 vardagar
There are some good reasons to start a global study of beech forests. One reason may be the importance of beech for man. In many places and in many ages, beech has played an important role in people's lives (Table 1). Already in old ages beech was useful for nuts, fuelwood and bokiz, beechwood tablets carved with runes, from which probably our word 'book' is derived. Beech still plays an important role in people's lives. Another reason for a global study of beech forests is that it lifts us above the detailed but fragmented image of a local study. My study of beech forests started out of love for these often beautiful forests, and, gradually, a small project grew into a world wide study. Table 1. Beech names. Scientific name Name Language Meaning - origin beech English bhagos (Indo-European) Fagus sylvatica do Buche, Rotbuche Gennan beuk do Dutch do bok Swedish do bog Danish do Mtre, fayard French hetre = hester (Gennanic), indicating young beeches do haya Spanish do faig Cathalan do faggio Italian do fagus Latin phagos = glutton (Greek), referring to edible nuts do fagul Romanian do buk Czech F. sylvatica subsp. orientalis kayin Turkish Fagus crenata buna Japanese unknown do sobaguri Japanese noodle chestnut (old), indicating hairy cupule- penduncles F agus japonica inubuna Japanese inferior beech Fagus spp.
Häftad, Engelska, 2010
2 479 kr
Skickas inom 10-15 vardagar
Vegetation of the Arabian Peninsula is the first comprehensive book on all aspects of the vegetation, phytogeography and conservation of the vast and varied region of the Arabian Peninsula. Written and edited by experts on the botany and environment of the Peninsula, this book synthesises the information available on all aspects of the flora and vegetation (including lower plants), from the mountains, sand seas, coasts, water bodies and desert plains to the plants of economic importance. The book contains chapters on the vegetation, ecology and phytogeography of the mountains, wadis, sand deserts, gravel plains, coasts and sabkhas. Chapters on climate and geology provide the background information for understanding the dynamics of the vegetation. A chapter on the diversity of plants gives details of the region's species richness and endemism, current threats to plant diversity and the measures taken in the form of protected areas and legislation in each country of the Peninsula. This book will be an invaluable reference for students, scholars and professionals interested in Southwest Asian botany.
Häftad, Engelska, 2011
1 619 kr
Skickas inom 10-15 vardagar
But continued effort and vigilance must be expended to insure that Mongolian society will continue to be sustained by its vegetation. This book highlights work such as conserving and restoring plant diversity in various ecosystems and makes recommendations for sustaining the vegetation basis of the nomadic Mongolian society.
Häftad, Engelska, 2010
1 619 kr
Skickas inom 10-15 vardagar
The main subject of this book is the interaction between diggings created by porcupines when consuming geophytes, and their influences on annual and perennial vegetation in a desert biome. The accumulation of run-off water in diggings and depressions made by animals increases the carrying capacity of these microhabitats in the desert biome. The accumulation of run-off water does not only benefit the natural vegetation; a system of human-made depressions can be evolved to increase the catchment of the run-off water that is typical to many desert habitats, and can lead to run-off agriculture in such areas. This book will be of interest to anyone working in the fields of development of deserts from the ecological point of view, water resources, soil protection and erosion, plant ecophysiology and settlement, and agronomy. It will be helpful to students, researchers, teachers, and anyone interested in any of these areas.
Häftad, Engelska, 2010
3 204 kr
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This book presents the first detailed survey, in English, of the forest vegetation of northeast Asia, a vast, mainly boreal or cool-temperate region that includes the Russian Far East (easternmost Siberia, Kamchatka, Sakhalin and Kuril Islands), Manchuria (northeastern China and adjacent), and northern Korea and Japan. Vegetation descriptions were prepared by local and foreign vegetation scientists, partly from literature sources but also from local field experience, including the several Czech-Slovak botanical expeditions to North Korea during the 1990s. Regional integration is provided in chapters on physical conditions and biogeography, and in a chapter comparing vegetation syntaxa. Two methodologies are used: 1) Exploration and forest classification following the Sukachev school of forest types (Manchuria and Russian Far East); and 2) Forest classification by Zurich-Montpellier (Braun-Blanquet) methodology (Japan and North Korea). The book should be valuable to vegetation scientists, conservation biologists, and anyone interested in the regional vegetation and landscapes, including students.
Häftad, Engelska, 2010
2 138 kr
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Plant geographical description of the area, syntaxonomy, spatial patterns, floristic richness, structure of plant communities in relation to soil properties and herbivore influence were described for a mountain region that is difficult to access. Seasonal, inter-annual, and long-term dynamics of vegetation are discussed on the base of long-term observations as well as pollen and phytolith analyses. Population biology of alpine plants is studied by combination of field observations and mathematical modelling. Plant population strategies and soil seed banks are described for alpine plants from several communities. Results of long-term ecological experiments (plant reciprocal transplantations, dominant removals, light limitation) showed the significance of competition and facilitation for community organization. Structure of soil algal and fungal communities is represented as well as mycorrhiza of alpine plants. Main animal groups (wild) history and modern nature conservation problems are discussed.
Häftad, Engelska, 2010
3 204 kr
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Weeds are a fascinating study for specialists, not only because of their economic importance, but also since in this case biology must be combined with history and agriculture (and its economic aspects). Thus, weed scientists may be concerned with pure basic research, concentrating on general aspects, or with applied science, i.e. having a practical orientation. One of the aims of this book is to create a synthesis between these two branches of study and to review the literature of both fields. The agrestals, the weeds of arable land ~ the most important group from an economic point of view ~ was chasen as the main topic. Other weed groups could only be mentioned briefly (e.g. grassland weeds), or superficially (e.g. aquatic weeds), or had to be omitted completely (e.g. ruderals, because they are so heterogeneous), to keep this volume to an acceptable size and price. Nevertheless, nearly all subsections of botanical science have been treated.
Del 6 - Geobotany
ecology and management of African wetland vegetation
A botanical account of African swamps and shallow waterbodies
Inbunden, Engelska, 1985
2 138 kr
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Interest in the biology of African 'wetlands' was initiated in the last century with the hypothesis that Lake Tanganyika was once part of a Jurassic sea, and was furthered by Cunnington's expedition at the beginning of this century which proved that it was not. In the late 1920's, ecological studies, encouraged by the growing importance of inland fisheries, were started hy British, French and Belgian biologists. Some twenty years later several government limnological research centres and fishery departments were established in tropical Africa, and scientific progress was accelerated. Scientific collaboration between the regions south of the Sahara was started formally in 1951 by the Scientific Council for Africa and stimulated by the International Biological Programme (1964-74) with its emphasis on biological productivity. Some of its interests were takcn on by SCOPE which recently selected continental wetlands as a Special Project; hence this book. The five authors, with-Patrick Denny as editor, have made a very valuable contribution both to science and to thc management of Africa's natural rcsourccs: thcy have filled a gap in the synthesis of knowledge about Africa's environments which is long overdue. The term 'wetland' is used today in several different contexts. For this purpose, it excludes the seas and large open inland waters. which are too deep for rooted plants, but includes the huge areas of floodplains and dambos which may change seasonally from standing water to very dry lands.
Inbunden, Engelska, 1985
2 138 kr
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Inbunden, Engelska, 1986
1 073 kr
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Inbunden, Engelska, 1987
1 605 kr
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This volume is the result of a Symposium, held in October, 1985, to celebrate the Silver Jubilee of the De partment of Plant Ecology of the University of Groningen. The Department of Plant Ecology was founded by Professor Dingeman Bakker and has, since its incep tion, been involved with studies of grasslands, and especially with the effects of human interference on grassland communities. It has been especially involved in an almost unique enterprise to convert areas of grassland from intensive agricultural production to nature reserves. With over-production of most food commodities in the EEC, and increasing interest in various types of 'set aside' schemes, this initiative now seems to be remarkably prescient. The Netherlands have a long history of human manipulation of the environment. Indeed, the Dutch en vironment is probably more man-made than that of any other country. In view of this, and the Laborato ry's interest in managed grasslands, it is not surprising that 'Disturbance in Grasslands' was selected as the topic for the Laboratory's Jubilee Symposium. Although both the Symposium and the resulting vo lume, have a strong Dutch component, the organisers invited a number of contributors from Europe and elsewhere to provide key chapters. The result is a volume which covers many aspects of disturbance in a variety of grasslands. Disturbance is considered at both the community and the population level, and the principles and processes underlying those responses are explored.
Del 12 - Geobotany
Plant Pheno-morphological Studies in Mediterranean Type Ecosystems
Inbunden, Engelska, 1988
2 138 kr
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Phenomorphology of flowering plants deals with starts growing, how long it grows and what happens the study of temporal changes in the morphology of to it when it stops growing. Is it being dispersed like plants and plant organs during their whole life diaspores, does it die eventually like leaves, or does span. It is in fact the study of the visible life history it remain alive as part of the plant body during the of each of the vegetative and generative organs of whole lifespan of the plant or during part of it, and the plant. Consequently it combines the use of finally what is its life duration. Generally only the phenology, which deals with the seasonality of phe life history of leaves, stems, flowers and fruits was nophases (Linnaeus 1751), and of morphology, followed. The following phenophases are de since the morphological changes of the plant as a scribed: vegetative growth, flower bud formation, whole and of its individual organs within and be fruiting, dispersal of diaspores, and leaf shedding. tween the phenophases are described. It is hoped that such a study of plant growth and Man's interest in plant life goes back to prehis development will lead to a better understanding of toric times.
Inbunden, Engelska, 1982
3 204 kr
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Weeds are a fascinating study for specialists, not only because of their economic importance, but also since in this case biology must be combined with history and agriculture (and its economic aspects). Thus, weed scientists may be concerned with pure basic research, concentrating on general aspects, or with applied science, i.e. having a practical orientation. One of the aims of this book is to create a synthesis between these two branches of study and to review the literature of both fields. The agrestals, the weeds of arable land ~ the most important group from an economic point of view ~ was chasen as the main topic. Other weed groups could only be mentioned briefly (e.g. grassland weeds), or superficially (e.g. aquatic weeds), or had to be omitted completely (e.g. ruderals, because they are so heterogeneous), to keep this volume to an acceptable size and price. Nevertheless, nearly all subsections of botanical science have been treated.
Inbunden, Engelska, 1982
2 138 kr
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