Eels at the Edge

Download Eels at the Edge PDF Online Free

Author :
Publisher :
ISBN 13 :
Total Pages : 496 pages
Book Rating : 4.3/5 (91 download)

DOWNLOAD NOW!


Book Synopsis Eels at the Edge by : J. M. Casselman

Download or read book Eels at the Edge written by J. M. Casselman and published by . This book was released on 2008 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a catastrophic worldwide decline of anguillid (freshwater eel) species. World authorities on the three species consider mechanisms for addressing this concern and reversing trends. This book emphasizes recent and new insights into basic biology, resource status, and management procedures.

Electron Energy-Loss Spectroscopy in the Electron Microscope

Download Electron Energy-Loss Spectroscopy in the Electron Microscope PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 1475750994
Total Pages : 491 pages
Book Rating : 4.4/5 (757 download)

DOWNLOAD NOW!


Book Synopsis Electron Energy-Loss Spectroscopy in the Electron Microscope by : R.F. Egerton

Download or read book Electron Energy-Loss Spectroscopy in the Electron Microscope written by R.F. Egerton and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: to the Second Edition Since the first (1986) edition of this book, the numbers of installations, researchers, and research publications devoted to electron energy-loss spec troscopy (EELS) in the electron microscope have continued to expand. There has been a trend towards intermediate accelerating voltages and field-emission sources, both favorable to energy-loss spectroscopy, and sev eral types of energy-filtering microscope are now available commercially. Data-acquisition hardware and software, based on personal computers, have become more convenient and user-friendly. Among university re searchers, much thought has been given to the interpretation and utilization of near-edge fine structure. Most importantly, there have been many practi cal applications of EELS. This may reflect an increased awareness of the potentialities of the technique, but in many cases it is the result of skill and persistence on the part of the experimenters, often graduate students. To take account of these developments, the book has been extensively revised (over a period of two years) and more than a third of it rewritten. I have made various minor changes to the figures and added about 80 new ones. Except for a few small changes, the notation is the same as in the first edition, with all equations in SI units.

Biology and Ecology of Anguillid Eels

Download Biology and Ecology of Anguillid Eels PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 1482255162
Total Pages : 334 pages
Book Rating : 4.4/5 (822 download)

DOWNLOAD NOW!


Book Synopsis Biology and Ecology of Anguillid Eels by : Takaomi Arai

Download or read book Biology and Ecology of Anguillid Eels written by Takaomi Arai and published by CRC Press. This book was released on 2016-02-22 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anguillid eels have fascinated biologists for centuries due to their spectacular long-distance migrations between freshwater habitats and their spawning areas far out in the ocean. This book provides a long overdue update on the biology and ecology of anguillid eels and features comprehensive coverage of the key features of the genus Anguilla. It c

Eels

Download Eels PDF Online Free

Author :
Publisher : Harper Perennial
ISBN 13 : 9780060566128
Total Pages : 304 pages
Book Rating : 4.5/5 (661 download)

DOWNLOAD NOW!


Book Synopsis Eels by : James Prosek

Download or read book Eels written by James Prosek and published by Harper Perennial. This book was released on 2011-10-11 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: They spawn in the middle of the ocean but spend their adult lives in freshwater. They can overcome seemingly insurmountable obstacles and even cross over land. They are revered as guardians and monster-seducers by New Zealand’s Maori, yet are often viewed with disgust in the West. They are a multibillion-dollar business in the Asian food market. They are often mistaken for snakes. They are eels—one of the world’s most amazing and least understood fish. (Yes, fish.) James Prosek offers a fascinating tour through the life history and cultural associations of the freshwater eel, exploring its biology, its myth and lore, its mystery and beauty. Eels is a mesmerizing biography of an intriguing and mysterious creature, as well as a telling look at humanity, the will to persist, and the ever-changing relationship between man and the natural world.

Transmission Electron Energy Loss Spectrometry in Materials Science and the EELS Atlas

Download Transmission Electron Energy Loss Spectrometry in Materials Science and the EELS Atlas PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 3527604774
Total Pages : 472 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!


Book Synopsis Transmission Electron Energy Loss Spectrometry in Materials Science and the EELS Atlas by : Channing C. Ahn

Download or read book Transmission Electron Energy Loss Spectrometry in Materials Science and the EELS Atlas written by Channing C. Ahn and published by John Wiley & Sons. This book was released on 2006-03-06 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book/CD package provides a reference on electron energy loss spectrometry (EELS) with the transmission electron microscope, an established technique for chemical and structural analysis of thin specimens in a transmission electron microscope. Describing the issues of instrumentation, data acquisition, and data analysis, the authors apply this technique to several classes of materials, namely ceramics, metals, polymers, minerals, semiconductors, and magnetic materials. The accompanying CD-ROM consists of a compendium of experimental spectra.

Transmission Electron Microscopy and Diffractometry of Materials

Download Transmission Electron Microscopy and Diffractometry of Materials PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 3642297609
Total Pages : 775 pages
Book Rating : 4.6/5 (422 download)

DOWNLOAD NOW!


Book Synopsis Transmission Electron Microscopy and Diffractometry of Materials by : Brent Fultz

Download or read book Transmission Electron Microscopy and Diffractometry of Materials written by Brent Fultz and published by Springer Science & Business Media. This book was released on 2012-10-14 with total page 775 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains concepts of transmission electron microscopy (TEM) and x-ray diffractometry (XRD) that are important for the characterization of materials. The fourth edition adds important new techniques of TEM such as electron tomography, nanobeam diffraction, and geometric phase analysis. A new chapter on neutron scattering completes the trio of x-ray, electron and neutron diffraction. All chapters were updated and revised for clarity. The book explains the fundamentals of how waves and wavefunctions interact with atoms in solids, and the similarities and differences of using x-rays, electrons, or neutrons for diffraction measurements. Diffraction effects of crystalline order, defects, and disorder in materials are explained in detail. Both practical and theoretical issues are covered. The book can be used in an introductory-level or advanced-level course, since sections are identified by difficulty. Each chapter includes a set of problems to illustrate principles, and the extensive Appendix includes laboratory exercises.

A Practical Guide to Transmission Electron Microscopy, Volume II

Download A Practical Guide to Transmission Electron Microscopy, Volume II PDF Online Free

Author :
Publisher : Momentum Press
ISBN 13 : 1606509187
Total Pages : 223 pages
Book Rating : 4.6/5 (65 download)

DOWNLOAD NOW!


Book Synopsis A Practical Guide to Transmission Electron Microscopy, Volume II by : Zhiping Luo

Download or read book A Practical Guide to Transmission Electron Microscopy, Volume II written by Zhiping Luo and published by Momentum Press. This book was released on 2015-12-23 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transmission Electron Microscope (TEM) is a very powerful tool for characterizing various types of materials. Using a light microscope, the imaging resolution is at several hundred nanometers, and for a Scanning Electron Microscope (SEM) at several nanometers. The imaging resolution of the TEM, however, can routinely reach several angstroms on a modem instrument. In addition, the TEM can also provide material structural information, since the electrons penetrate through the thin specimens, and chemical compositional information due to the strong electron-specimen atom interactions. This book provides a concise practical guide to the TEM user, starting from the beginner level, including upper-division undergraduates, graduates, researchers, and engineers, on how to learn TEM efficiently in a short period of time. Volume I covers the instrumentation, sample preparation, fundamental diffraction, imaging, analytical microscopy, and some newly developed microscopy techniques. This book may serve as a textbook for a TEM course or workshop, or a reference book for the TEM user to improve their TEM skills.

Eel Biology

Download Eel Biology PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 4431659072
Total Pages : 486 pages
Book Rating : 4.4/5 (316 download)

DOWNLOAD NOW!


Book Synopsis Eel Biology by : K. Aida

Download or read book Eel Biology written by K. Aida and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a food resource in both Eastern and Western countries, the eel is an important fish. Over the years, remarkable progress has been achieved in understanding the mysterious life cycle of eels that has fascinated scientists since the age of Aristotle. The spawning area of the Japanese eel was discovered and the migratory route of its larvae was elucidated. With the development of techniques for artificial induction of gonadal maturation, it became possible to obtain hatched larvae. Larval rearing to the leptocephalus stage, one of the most difficult tasks involved in eel culture, finally was achieved. By presenting these important breakthroughs, Eel Biology will be of great help in the development of effective management strategies for maintaining stable eel populations. With contributions by leading experts, this book is a valuable source for researchers as well as industry technicians in the fields of aquatic biology, aquaculture, and fisheries.

The Book of Eels

Download The Book of Eels PDF Online Free

Author :
Publisher : HarperCollins
ISBN 13 : 0062968831
Total Pages : 256 pages
Book Rating : 4.0/5 (629 download)

DOWNLOAD NOW!


Book Synopsis The Book of Eels by : Patrik Svensson

Download or read book The Book of Eels written by Patrik Svensson and published by HarperCollins. This book was released on 2020-05-26 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Finalist for the Los Angeles Times Book Prize National Bestseller Winner of the National Outdoor Book Award Longlisted for the Andrew Carnegie Medal for Excellence in Nonfiction A New York Times Notable Book One of TIME’s 100 Must Read Books of the Year One of The Washington Post’s 50 Notable Nonfiction Books of the Year One of Smithsonian Magazine’s 10 Best Science Books of the Year One of Publishers Weekly’s Best Nonfiction Books of the Year A New York Times Editor’s Choice Part H Is for Hawk, part The Soul of an Octopus, The Book of Eels is both a meditation on the world’s most elusive fish—the eel—and a reflection on the human condition Remarkably little is known about the European eel, Anguilla anguilla. So little, in fact, that scientists and philosophers have, for centuries, been obsessed with what has become known as the “eel question”: Where do eels come from? What are they? Are they fish or some other kind of creature altogether? Even today, in an age of advanced science, no one has ever seen eels mating or giving birth, and we still don’t understand what drives them, after living for decades in freshwater, to swim great distances back to the ocean at the end of their lives. They remain a mystery. Drawing on a breadth of research about eels in literature, history, and modern marine biology, as well as his own experience fishing for eels with his father, Patrik Svensson crafts a mesmerizing portrait of an unusual, utterly misunderstood, and completely captivating animal. In The Book of Eels, we meet renowned historical thinkers, from Aristotle to Sigmund Freud to Rachel Carson, for whom the eel was a singular obsession. And we meet the scientists who spearheaded the search for the eel’s point of origin, including Danish marine biologist Johannes Schmidt, who led research efforts in the early twentieth century, catching thousands upon thousands of eels, in the hopes of proving their birthing grounds in the Sargasso Sea. Blending memoir and nature writing at its best, Svensson’s journey to understand the eel becomes an exploration of the human condition that delves into overarching issues about our roots and destiny, both as humans and as animals, and, ultimately, how to handle the biggest question of all: death. The result is a gripping and slippery narrative that will surprise and enchant.

Light-element Analysis in the Transmission Electron Microscope, WEDX and EELS

Download Light-element Analysis in the Transmission Electron Microscope, WEDX and EELS PDF Online Free

Author :
Publisher : Oxford University Press, USA
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.3/5 (91 download)

DOWNLOAD NOW!


Book Synopsis Light-element Analysis in the Transmission Electron Microscope, WEDX and EELS by : Peter M. Budd

Download or read book Light-element Analysis in the Transmission Electron Microscope, WEDX and EELS written by Peter M. Budd and published by Oxford University Press, USA. This book was released on 1988 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasizing practical application over theory, this book explains in simple terms the two major techniques by which analysis of very light elements using the transmission electron microscope (TEM) is performed: x-ray analysis without a window (WEDX) and electron energy loss spectroscopy (EELS). Readers familiar with the TEM will quickly learn how to analyse for the light elements (boron, carbon, nitrogen, oxygen, and fluorine). Each technique is first described as it is used for qualitative analysis, and then quantitative analysis is developed. In a final chapter, the two techniques are compared. The book is a practical guide for biologists and for researchers in the medical, physical, and materials sciences.

Scanning Transmission Electron Microscopy

Download Scanning Transmission Electron Microscopy PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 1441972005
Total Pages : 764 pages
Book Rating : 4.4/5 (419 download)

DOWNLOAD NOW!


Book Synopsis Scanning Transmission Electron Microscopy by : Stephen J. Pennycook

Download or read book Scanning Transmission Electron Microscopy written by Stephen J. Pennycook and published by Springer Science & Business Media. This book was released on 2011-03-24 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scanning transmission electron microscopy has become a mainstream technique for imaging and analysis at atomic resolution and sensitivity, and the authors of this book are widely credited with bringing the field to its present popularity. Scanning Transmission Electron Microscopy(STEM): Imaging and Analysis will provide a comprehensive explanation of the theory and practice of STEM from introductory to advanced levels, covering the instrument, image formation and scattering theory, and definition and measurement of resolution for both imaging and analysis. The authors will present examples of the use of combined imaging and spectroscopy for solving materials problems in a variety of fields, including condensed matter physics, materials science, catalysis, biology, and nanoscience. Therefore this will be a comprehensive reference for those working in applied fields wishing to use the technique, for graduate students learning microscopy for the first time, and for specialists in other fields of microscopy.

Handbook of Thin Films, Five-Volume Set

Download Handbook of Thin Films, Five-Volume Set PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0080533248
Total Pages : 3451 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!


Book Synopsis Handbook of Thin Films, Five-Volume Set by : Hari Singh Nalwa

Download or read book Handbook of Thin Films, Five-Volume Set written by Hari Singh Nalwa and published by Elsevier. This book was released on 2001-11-17 with total page 3451 pages. Available in PDF, EPUB and Kindle. Book excerpt: This five-volume handbook focuses on processing techniques, characterization methods, and physical properties of thin films (thin layers of insulating, conducting, or semiconductor material). The editor has composed five separate, thematic volumes on thin films of metals, semimetals, glasses, ceramics, alloys, organics, diamonds, graphites, porous materials, noncrystalline solids, supramolecules, polymers, copolymers, biopolymers, composites, blends, activated carbons, intermetallics, chalcogenides, dyes, pigments, nanostructured materials, biomaterials, inorganic/polymer composites, organoceramics, metallocenes, disordered systems, liquid crystals, quasicrystals, and layered structures. Thin films is a field of the utmost importance in today's materials science, electrical engineering and applied solid state physics; with both research and industrial applications in microelectronics, computer manufacturing, and physical devices. Advanced, high-performance computers, high-definition TV, digital camcorders, sensitive broadband imaging systems, flat-panel displays, robotic systems, and medical electronics and diagnostics are but a few examples of miniaturized device technologies that depend the utilization of thin film materials. The Handbook of Thin Films Materials is a comprehensive reference focusing on processing techniques, characterization methods, and physical properties of these thin film materials.

Amorphous Nanomaterials

Download Amorphous Nanomaterials PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 3527826351
Total Pages : 434 pages
Book Rating : 4.5/5 (278 download)

DOWNLOAD NOW!


Book Synopsis Amorphous Nanomaterials by : Lin Guo

Download or read book Amorphous Nanomaterials written by Lin Guo and published by John Wiley & Sons. This book was released on 2021-03-30 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: A valuable overview covering important fundamental and applicative aspects of amorphous nanomaterials! Amorphous nanomaterials are very important in non-crystalline solids, which have emerged as a new category of advanced materials. Compared to the crystalline counterpart, amorphous nanomaterials with isotropic nature always exhibit fast ion diffusion, relieved strain, and higher reactivity, enabling such materials to exhibit high performance in mechanics and catalysis, as well as other interesting properties. Amorphous Nanomaterials: Preparation, Characterization, and Applications covers the fundamental concept, synthesis, characterization, properties, and applications of nanoscaled amorphous materials. It starts with the introduction of amorphous materials, then gives a global view of the history, structure, and growth mechanism of amorphous nanomaterials. Subsequently, some powerful techniques to characterize amorphous materials, such as X-ray absorption fine structure spectroscopy, spherical aberration electron microscope, in-situ-Transmission Electron Microscope, Electron Energy Loss Spectroscopy, and some other defect characterization technologies are included. Furthermore, the emerging innovative methods to fabricate well-defined, regularshaped amorphous nanomaterials, including zero-, one-, two-, and three-dimensional amorphous nanomaterials are systematically introduced. The fascinating properties and applications related to amorphous nanomaterials including the applications in electrocatalysis, batteries, supercapacitors, photocatalysis, mechanics, etc., are presented. It will greatly help the researchers to find professional answers related to amorphous materials. Great topic: amorphous nanomaterials are a very large and important field in both academia and industry Comprehensive: in-depth discussion of various important aspects, from both a fundamental and an applied point of view, on the chemistry, physics and technological importance of the amorphous nanomaterials are presented Vitally needed: the understanding of the fundamentals of amorphous nanomaterials is a prerequisite for devising new applications of such materials Highly relevant: amorphous nanomaterials have found specific applications in chemistry, catalysis, physics, sensing, batteries, supercapacitors, and engineering Amorphous Nanomaterials is a vital resource for materials scientists, inorganic and physical chemists, solid state chemists, physicists, catalytic and analytical chemists, as well as organic chemists.

International Tables for Crystallography, Mathematical, Physical and Chemical Tables

Download International Tables for Crystallography, Mathematical, Physical and Chemical Tables PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 0470710292
Total Pages : 1043 pages
Book Rating : 4.4/5 (77 download)

DOWNLOAD NOW!


Book Synopsis International Tables for Crystallography, Mathematical, Physical and Chemical Tables by : E. Prince

Download or read book International Tables for Crystallography, Mathematical, Physical and Chemical Tables written by E. Prince and published by John Wiley & Sons. This book was released on 2004-01-16 with total page 1043 pages. Available in PDF, EPUB and Kindle. Book excerpt: International Tables for Crystallography is the definitive resource and reference work for crystallography and structural science. Each of the volumes in the series contains articles and tables of data relevant to crystallographic research and to applications of crystallographic methods in all sciences concerned with the structure and properties of materials. Emphasis is given to symmetry, diffraction methods and techniques of crystal-structure determination, and the physical and chemical properties of crystals. The data are accompanied by discussions of theory, practical explanations and examples, all of which are useful for teaching. Volume C provides the mathematical, physical and chemical information needed for experimental studies in structural crystallography. This volume covers all aspects of experimental techniques, using all three principal radiation types (X-ray, electron and neutron), from the selection and mounting of crystals and production of radiation, through data collection and analysis, to interpretation of results. Each chapter is supported by a substantial collection of references, and the volume ends with a section on precautions against radiation injury. Eleven chapters have been revised, corrected or updated for the third edition of Volume C. More information on the series can be found at: http://it.iucr.org

Electron Beam-Specimen Interactions and Simulation Methods in Microscopy

Download Electron Beam-Specimen Interactions and Simulation Methods in Microscopy PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 1118696654
Total Pages : 303 pages
Book Rating : 4.1/5 (186 download)

DOWNLOAD NOW!


Book Synopsis Electron Beam-Specimen Interactions and Simulation Methods in Microscopy by : Budhika G. Mendis

Download or read book Electron Beam-Specimen Interactions and Simulation Methods in Microscopy written by Budhika G. Mendis and published by John Wiley & Sons. This book was released on 2018-03-21 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed presentation of the physics of electron beam-specimen interactions Electron microscopy is one of the most widely used characterisation techniques in materials science, physics, chemistry, and the life sciences. This book examines the interactions between the electron beam and the specimen, the fundamental starting point for all electron microscopy. Detailed explanations are provided to help reinforce understanding, and new topics at the forefront of current research are presented. It provides readers with a deeper knowledge of the subject, particularly if they intend to simulate electron beam-specimen interactions as part of their research projects. The book covers the vast majority of commonly used electron microscopy techniques. Some of the more advanced topics (annular bright field and dopant atom imaging, atomic resolution chemical analysis, band gap measurements) provide additional value, especially for readers who have access to advanced instrumentation, such as aberration-corrected and monochromated microscopes. Electron Beam-Specimen Interactions and Simulation Methods in Microscopy offers enlightening coverage of: the Monte-Carlo Method; Multislice Simulations; Bloch Waves in Conventional and Analytical Transmission Electron Microscopy; Bloch Waves in Scanning Transmission Electron Microscopy; Low Energy Loss and Core Loss EELS. It also supplements each chapter with clear diagrams and provides appendices at the end of the book to assist with the pre-requisites. A detailed presentation of the physics of electron beam-specimen interactions Each chapter first discusses the background physics before moving onto simulation methods Uses computer programs to simulate electron beam-specimen interactions (presented in the form of case studies) Includes hot topics brought to light due to advances in instrumentation (particularly aberration-corrected and monochromated microscopes) Electron Beam-Specimen Interactions and Simulation Methods in Microscopy benefits students undertaking higher education degrees, practicing electron microscopists who wish to learn more about their subject, and researchers who wish to obtain a deeper understanding of the subject matter for their own work.

纳米技术中的显微学手册

Download 纳米技术中的显微学手册 PDF Online Free

Author :
Publisher : 清华大学出版社有限公司
ISBN 13 : 9787302097587
Total Pages : 440 pages
Book Rating : 4.0/5 (975 download)

DOWNLOAD NOW!


Book Synopsis 纳米技术中的显微学手册 by :

Download or read book 纳米技术中的显微学手册 written by and published by 清华大学出版社有限公司. This book was released on 2005 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: 本书叙述了电子显微学的内容,共有12个专题。力图使读者对所叙述的方法有一个概念上的理解,而不是只停留在对理论的堆砌上。

Boron in Plant and Animal Nutrition

Download Boron in Plant and Animal Nutrition PDF Online Free

Author :
Publisher : Springer Science & Business Media
ISBN 13 : 9780306472435
Total Pages : 442 pages
Book Rating : 4.4/5 (724 download)

DOWNLOAD NOW!


Book Synopsis Boron in Plant and Animal Nutrition by : Heiner Goldbach

Download or read book Boron in Plant and Animal Nutrition written by Heiner Goldbach and published by Springer Science & Business Media. This book was released on 2002-05-31 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Boron '97 meeting was a great success in summarising all recent developments in basic and applied research on boron's function, especially in plants. New techniques have since been developed and new insight has been gained into the role of boron in plant and animal metabolism. Nevertheless, there were still lots of open questions. The aim of the present workshop held in Bonn as a satellite meeting to the International Plant Nutrition Colloquium was thus to gather all actual information which has been gained since the Boron '97 meeting and to compile knowledge, both from animal and plant sciences. Furthermore, applied aspects had to be addressed too, as there is an increasing awareness of boron deficiencies even in crops such as wheat, which have formerly not been considered as responsive to boron application. Genetic differences in boron demand and efficiency within one species are a further important topic which has gained importance since the 1997 meeting. More in-depth knowledge on the mechanisms of boron efficiency are required as an increased efficiency will be one major possibility to maintain and improve crop yields for resource-poor farmers. Nevertheless, it has also clearly been shown that an adequate supply of boron is needed to obtain high yields of crops with a high quality, and that a sustainable agriculture has to provide an adequate boron supply to compensate for inevitable losses through leaching (especially in the humid tropics and temperate regions) and for the boron removal by the crop.