A Textbook of Agronomy PDF Download

Author: B. Chandrasekaran
Publisher: New Age International
ISBN: 9788122427431
Category : Agronomy
Languages : en
Pages : 0

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Author: Louis Frederick Fieser
Publisher:
ISBN:
Category : Chemical warfare
Languages : en
Pages : 256

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Book Description
The author records episodes during World War II when he became involved in projects requiring incendiary devices of assorted and unconventional types. Post-war projects include development of devices for student experimentation and teaching. He shows how the scientific method was used on a range of projects from designing a device to ignite oil slicks on water to creating a squirrel-proof birdfeeder.

Author: Mervin James Curl
Publisher:
ISBN:
Category : English language
Languages : en
Pages : 328

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Author: Randall E. Stross
Publisher:
ISBN: 9780520066205
Category : Technology & Engineering
Languages : en
Pages : 272

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Book Description
00 This is a study of the first major American effort to aid a developing country--China--in the early twentieth century. Anyone interested in U.S.-China relations and in the American presence abroad will find it provocative and frequently moving. This is a study of the first major American effort to aid a developing country--China--in the early twentieth century. Anyone interested in U.S.-China relations and in the American presence abroad will find it provocative and frequently moving.

Author: Joan Solomon
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 88

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Book Description
This text describes an area which has increasingly generated classroom materials, and educational polemic, without any proper discussion of its rationale or aims. Different approaches to the teaching and implementation of STS are used to explore different facets of its nature.

Author: Hans Jenny
Publisher: Springer Science & Business Media
ISBN: 1461261120
Category : Technology & Engineering
Languages : en
Pages : 392

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Book Description
change is simply described by the rate of income and rate of loss. Our home's energy budget, our firm's inventory, our nation's debt, and humanity's numbers all have accounts that change at rates that are equal to the inputs minus the outputs. Jenny's "system view" of the soil was carried into the fertile fields of Midwestern American prairies from the laboratories of Switzerland in the late 1920s. Jenny's rate equations provided the other paradigm or world view that, I recall, brought us to the threshold of systems ecology as it later evolved in the second half of the twentieth century. As if world renown in the specialties of pedology and soil chemistry were not enough for one lifetime, excerpts below remind us that Hans Jenny has also been a perceptive outdoor field ecologist since his early Alpine expeditions with Braun Blanquet in the mid 1920s. Jenny's ecosystem studies in the pygmy forest, a further classic example of a soil-plant system "run down" over hundreds of thousands of years since its origin, continue to occupy some of the vigorous retirement time near his farm in Mendocino County. But each specific, quantitative case study, and each research area conserved (with additional hard work) for further study by future generations, fits into Jenny's coherent world view. It is that view, and its legacies of discovery and of tangible landscape preserves, which we are privileged to share with their originator in this volume.

Author: Ursula Kües
Publisher: Universitätsverlag Göttingen
ISBN: 3940344117
Category : Forest products industry
Languages : en
Pages : 646

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Book Description
In the year 2001, Prof. Dr. Ursula Kües was appointed at the Faculty of Forest Sciences and Forest Ecology of the Georg-August-University Göttingen to the chair Molecular Wood Biotechnology endowed by the Deutsche Bundesstiftung Umwelt (DBU). Her group studies higher fungi in basic and applied research. Research foci are on mushroom development and on fungal enzymes degrading wood and their applications in wood biotechnology. This book has been edited to thank the DBU for all support given to the chair Molecular Wood Biotechnology. Contributions to the book are from scientists from Göttingen recognised in different fields of forestry and wood science. Chapters presented by members of the group Molecular Wood Biotechnology introduces into their areas of research. The book is designed for interested students of wood biology and wood technology but will also address scientists in the field.

Author: A. K. Vyas
Publisher:
ISBN: 9788183600347
Category : Agriculture
Languages : en
Pages : 496

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Author: Jameel M. Al-Khayri
Publisher: Springer Nature
ISBN: 3030736067
Category : Science
Languages : en
Pages : 595

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Book Description
This book provides up-to-date knowledge of the promising field of Nanobiotechnology with emphasis on the mitigation approaches to combat plant abiotic stress factors, including drought, salinity, waterlog, temperature extremes, mineral nutrients, and heavy metals. These factors adversely affect the growth as well as yield of crop plants worldwide, especially under the global climate change. Nanobiotechnology is viewed to revolutionize crop productivity in future. The chapters discuss the status and prospects of this cutting-edge technology toward understanding tolerance mechanisms, including signaling molecules and enzymes regulation in addition to the applications of Nanobiotechnology to combat individual abiotic stress factors.

Author: Dick Sandberg
Publisher: CRC Press
ISBN: 1351028200
Category : Nature
Languages : en
Pages : 765

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Book Description
The market for durable products using modified wood has increased substantially during the last few years. This is partly because of the restriction on the use of toxic preservatives due to environmental concerns, and to lower maintenance cost and time. Furthermore, as sustainability becomes a greater concern, the environmental impact of construction and interior materials is factored in planning by considering the whole life cycle and embodied energy of the materials used. Wood is modified to improve its intrinsic properties, enhance the range of applications of timber, and to acquire the form and functionality desired by engineers without calling the environmental friendliness into question. Wood modification processes are at various stages of development, and the challenges faced in scaling up to industrial applications differ. The aim of this book is to put together the key elements of the changes of wood constituents and the related changes in wood properties of modified wood. Further, a selection of the principal technologies implemented in wood modification are presented. This work is intended for researchers, professionals of timber construction, as well as students studying the science of materials, civil engineering and architecture. This work is not exhaustive, but intends to deliver an outline of the scientific disciplines necessary to apprehend the technologies of wood modification and its behavior during treatment, as well as during its use.