A Bibliography of Heliothis Zea (Boddie) and H. Virescens (F.) (Lepidoptera:Noctuidae) PDF Download

Author: Jenny Kogan
Publisher:
ISBN:
Category : Heliothis virescens
Languages : en
Pages : 254

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Author: M. Kogan
Publisher: Springer Science & Business Media
ISBN: 1461299985
Category : Science
Languages : en
Pages : 597

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Insects as a group occupy a middle ground in the biosphere between bacteria and viruses at one extreme, amphibians and mammals at the other. The size and gen eral nature of insects present special problems to the student of entomology. For example, many commercially available instruments are geared to measure in grams, while the forces commonly encountered in studying insects are in the mil ligram range. Therefore, techniques developed in the study of insects or in those fields concerned with the control of insect pests are often unique. Methods for measuring things are common to all sciences. Advances sometimes depend more on how something was done than on what was measured; indeed a given field often progresses from one technique to another as new methods are discovered, developed, and modified. Just as often, some of these techniques fmd their way into the classroom when the problems involved have been suffici ently ironed out to permit students to master the manipulations in a few labo ratory periods. Many specialized techniques are confined to one specific research laboratory. Although methods may be considered commonplace where they are used, in another context even the simplest procedures may save considerable time. It is the purpose of this series (1) to report new developments in methodology, (2) to reveal sources of groups who have dealt with and solved particular entomological problems, and (3) to describe experiments which might be applicable for use in biology laboratory courses.

Author: Luko Hilje-Quirós
Publisher:
ISBN:
Category : Tobacco
Languages : en
Pages : 570

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Author: William Shurtleff
Publisher: Soyinfo Center
ISBN: 1948436086
Category :
Languages : en
Pages : 1397

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Author:
Publisher: IRRI
ISBN: 9711041456
Category : Technology & Engineering
Languages : en
Pages : 702

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Author: William Shurtleff; Akiko Aoyagi
Publisher: Soyinfo Center
ISBN: 1948436582
Category : Reference
Languages : en
Pages : 856

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The world's most comprehensive, well documented, and well illustrated book on this subject. With extensive subject and geographic index. 81 photographs and illustrations - mostly color. Free of charge in digital PDF format.

Author:
Publisher:
ISBN:
Category : Bibliographical literature
Languages : en
Pages : 696

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Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 528

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Author: New York Public Library. Research Libraries
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 784

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Author: D.K. Salunkhe
Publisher: Springer Science & Business Media
ISBN: 1461520398
Category : Technology & Engineering
Languages : en
Pages : 510

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Book Description
The present world population of about five billion and its projected growth cre ate enonnous pressures and demands for food and industrial raw materials. It is to crop plants, one of our precious few renewable resources, that we must look to meet most of these needs. Globally, about 88% of our caloric requirements and 90% of our protein ultimately derive from plant sources-ample evidence of their importance to humankind. Our survival will therefore continue to de pend on the world's largest and certainly most important industry: agriculture. Yet in spite of our long history of domestication and civilization, the number of crop species involved in sustaining human life is strictly limited: Essentially, some twenty-four crops protect us from starvation. To know these basic food crop plants-to study how they function and how their productivity may be improved--is the first step in solving the world food problem. The primary objectives in writing this book were to address this chal lenge and to review comprehensively the wealth of available yet scattered infor mation on food crop productivity and processing. Unlike several other texts and monographs in this field, the present work was intended to give, in a single volume, a quick, infonnative view of the various problems from field to table concerning the major food crops worldwide.