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Crop Ecology: Productivity and Management in Agricultural Systems, by R. S. Loomis, D. J. Connor
PDF Download Crop Ecology: Productivity and Management in Agricultural Systems, by R. S. Loomis, D. J. Connor
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This book is centered on the "production processes" of crops and pastures, photosynthesis, and use of water and nutrients in fields. It is unique in its combination of great breadth and depth in its treatment of production processes and systems problems. The approach is explanatory and integrative, with a firm basis in environmental physics, soils, physiology, and morphology, in contrast to descriptive or reductionist approaches. Systems concepts are introduced early and expanded as the book proceeds, giving emphasis to quantitative approaches, to management strategies and tactics employed by farmers, and to environmental issues. The systems approach is brought together in the final chapters where production and nutrient cycling are analyzed, for example farms and problems in an uncertain future are considered. The book is designed for use as a text for an introductory course in crop ecology (advanced undergraduates and beginning post-graduate level). In addition, given the wide range of subjects, the integrated references, and the background material included, it can also be considered a "stand-alone" reference work useful to agriculturalists and botanists.
- Sales Rank: #501556 in Books
- Brand: Brand: Cambridge University Press
- Published on: 1992-10-30
- Original language: English
- Number of items: 1
- Dimensions: 9.72" h x 1.14" w x 6.85" l, 2.00 pounds
- Binding: Paperback
- 556 pages
- Used Book in Good Condition
Most helpful customer reviews
0 of 0 people found the following review helpful.
Five Stars
By Ren-he,Zhang
good
1 of 1 people found the following review helpful.
Not for all but great for those who need it.
By Ed
Crop Ecology is a synthesis of class lecture notes and research collected by the authors over their professional careers. It covers cropping systems from how agriculture is organized at a regional level down to the biochemical pathways of photosynthesis. This is not an introductory text. However, I have found the book to be filled with great examples and illustrations that I use in undergraduate and graduate agronomy instruction. It has been a good investment.
1 of 2 people found the following review helpful.
Erroneous, Poorly Organized and Derisive in Places
By Gregory McMahan
I came across this book as part of a class on quantitative ecology (whatever that may mean). Basically, this text strives to do too much, with little or no emphasis on quality or presentation. Granted, the authors present all the fundamental concepts, defining them succinctly as they are introduced, but in their attempt to show breadth, no particular topic is covered in depth.
For instance, Chapter 10, which covers photosynthesis, could have been separated into three smaller, more focused chapters. The same thing could have been said about Chapter 9, which dealt with water relations. Chapter 9 was especially annoying, because the authors, in an attempt to appear quantitatively rigorous (via the superfluous use of equations), used the same symbols to connote two or three variables, and it was not long before the Professor and the students in the class got confused and gave up on the text.
Then there is Chapter 6, which deals with the aerial environment. The authors repeatedly confused power and energy terms and units. Chapter One was about as bad, but here they repeatedly omitted discussions of the basis and context of their numbers, calculations and equations. I found their decision not to discuss the limitations of the concept of carrying capacity especially disturbing.
Furthermore, the authors tend to be quite derisive in places, especially with regard to Third World cropping strategies (Chapter 5) and organic and bio-intensive agriculture (Chapters 15 and 18). Although I can understand their legitimate scientific criticisms of organic agriculture (and there are quite a few) and bio-intensive cultivation techniques (reliance on human power), their rich country bias shows when they deplore the low level of technological sophistication in the Third World. Apparently, the authors do not seem to realize that not everyone has access to credit and ag extension services, and that assuming that modern farming techniques in America and Australia can be extended to anyone, anywhere. The poor in the Third World do what they can with what they have, and the authors should appreciate this sad state of affairs, even if they don't respect it.
Honestly, the book would have benefitted by some sort of comprehensive editting, as well as a list of symbols and notations at the beginning of each chapter. That way, the reader would not have to flip back and forth to figure out what they meant by this abbreviation or that symbol or equation.
Still, the book did have some good points, those being the final chapter (Chapter 18- Towards an Uncertain Future), a list for further reading at the end of each chapter, and a large and comprehensive bibliography. The discussion on energetic inputs to agriculture in Chapter 15 was decent, but I found their penchant to quote numbers- estimates, projections and statistics, for which there was not a single reference to be off-putting. Finally, the authors do introduce all of the major fundamental scientific concepts underpinning modern economic cropping, so they can not be faulted for this, but the context is extremely limited- mostly the US and Australia, with one or two locations here and there thrown in the mix.
In sum, this is not a good book for study of the various quantitave aspects of ecology, but it might serve as a reference of limited utility. A better book in the same category is W Larcher's Physiological Plant Ecology, which covers pretty much all of the same topics, albeit with much better organization and more focus.
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