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Author: Donald G. Kaufman
Publisher:
ISBN: 9780787238971
Category : Conservation of natural resources
Languages : en
Pages : 64
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Book Description
Author: Donald G. Kaufman
Publisher:
ISBN: 9780787238971
Category : Conservation of natural resources
Languages : en
Pages : 64
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Book Description
Author: Donald G. Kaufman
Publisher:
ISBN:
Category : Conservation of natural resources
Languages : en
Pages : 51
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Book Description
Author: Donald G. Kaufman
Publisher: Kendall Hunt
ISBN: 9780787257132
Category : Nature
Languages : en
Pages : 708
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Book Description
Author: A. Kaufman
Publisher:
ISBN: 9780063635807
Category :
Languages : en
Pages : 582
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Book Description
Author: Donald G. Kaufman
Publisher: HarperCollins College
ISBN: 9780065007718
Category : Nature
Languages : en
Pages : 242
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Book Description
Author: Heinrich Walter
Publisher: Springer Science & Business Media
ISBN: 1468404687
Category : Science
Languages : en
Pages : 295
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Book Description
Phytomass and Primary Production of the Various Vegetational Zones and of the Entire Biosphere The biosphere is that thin layer at the earth's surface in which living organisms exist and biological cycling takes place. It includes the upper horizons of the soil in which plants root, the atmosphere near the ground, (insofar as organisms penetrate this space), and all the surface waters. More than 99% of the earth's biomass is phytomass, to which we shall limit our discussion. Amounts of phytomass are distinctly related to vegeta tional zones. Because accurate determination of phytomass and primary production is difficult, only gross estimates have been available until recently. However, in 1970, Bazilevich et al. published (in Russian) more accurate calculations, based on the rapidly accumulating literature, for the various thermal zones and bioclimatic regions of the earth. These authors calculated mean phyto mass and mean annual primary production for the various regions as dry mass (in tons) per hectare. On the basis of measurements of the areas covered by the individual regions, excluding rivers, lakes, glaciers, and permanent snow, total phytomass and total annual primary production for the various regions were obtained (see table). The sum of these figures is the phytomass and annual production of the land surface of the earth. In addition, the table gives corresponding data for the waters of the earth. The values involved are potential i. e. , they are based on natural vegetation uninfluenced by man.
Author: Miroslav Radojevic
Publisher: Royal Society of Chemistry
ISBN: 1782625488
Category : Science
Languages : en
Pages :
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Book Description
New techniques, improved understanding and changes in regulations relating to environmental analysis means that students, technicians and lecturers alike need an up-to-date guide to practical environmental analysis. This unique book provides detailed instructions for practical experiments in environmental analysis. The comprehensive coverage includes the chemical analysis of important pollutants in air, water, soil and plant tissue, and the experiments generally require only basic laboratory equipment and instrumentation. The content is supported by theoretical material explaining, amongst other concepts, the principles behind each method and the importance of various pollutants. Also included are suggestions for projects and worked examples. Appendices cover environmental standards, practical safety and laboratory practice. Building on the foundations laid by the highly acclaimed first edition, this new edition has been revised and updated to include information on new monitoring techniques, the Air Quality Index, internet resources and professional ethics. Like its predecessor, this informative text is certain to be valued as an indispensable guide to practical environmental analysis by students on a variety of science courses and their lecturers. Reviews of the first edition: "I strongly urge academics in chemistry, biology, botany, soil science, geography and environmental science departments to give [this book] serious consideration as a course text." Malcolm Cresser, Environment Department, University of York, UK "Destined to become a course text for many university courses ... a high quality, informative introductory text ... there should be multiple copies on most university's library shelves." Environmental Conservation
Author: Bowker Editorial Staff
Publisher:
ISBN: 9780835243155
Category : Computers
Languages : en
Pages : 1716
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Book Description
Author: Brian Groombridge
Publisher: Univ of California Press
ISBN: 9780520236684
Category : Nature
Languages : en
Pages : 362
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Book Description
Global biological diversity, ecosystem diversity.
Author: Robert E. Yager
Publisher: NSTA Press
ISBN: 193894609X
Category : Education
Languages : en
Pages : 266
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Book Description
“Since K–12 students taught using the new [Next Generation Science Standards]will be arriving in college classrooms prepared in a different way from those in our classrooms currently, it would behoove college teachers to be prepared to alter their teaching methods ... or be perceived to be dinosaurs using the older teaching methods.” — From Exemplary College Science Teaching If you’re looking for inspiration to alter your teaching methods to match new standards and new times, this book is for you. As the first in the Exemplary Science series to focus exclusively on college science teaching, this book offers 16 examples of college teaching that builds on what students learned in high school. Understanding that college does not exist in a vacuum, the chapter authors demonstrate how to adapt the methods and frameworks under which secondary students have been working and make them their own for the college classroom, adding new technologies when appropriate and letting the students take an active role in their learning. Among the innovative topics and techniques the essays in this book explore are • Lecture-free college science teaching • Peer-led study groups as learning communities • Jigsaw techniques that enhance learning • Inquiry incorporated into large-group settings • Interactive video conferences for assessing student attitudes and behaviors The clichéd image of the professor droning on before a packed lecture hall is a thing of the past. The essays in this book explain why—and offer the promise of a better future.
