
xxvii
Acknowledgments
This third edition is enriched by contributions from three talented friends. The cover
design is by Jim Carr, and Gary Witt took most of the title page photographs. Their
artistry provides a welcome link between words on a page and the world they try to
describe. Noah Greenberg, a wetland scientist, constructively reviewed parts of the
book related to nutrients and agricultural water quality, Chapter 4 and Section 6.11.
Their generous help is much appreciated.
(Photo courtesy of Gary Witt)
The chemical makeup of a collected water sample reects the history of its prior ow path,
particularly the minerals it has contacted, its ...