Regional adaptation data of woody plants are usually compiled from the results of test plantings conducted by sections of experiment stations, from growth and survival results in arboreta, from observational notes and collections of botanists, horticulturists, landscape architects and others, and from deductions based on their behavior in similar regions under native and cultural conditions. At best, recommendations as to whether a species or variety is adapted to a given region are extremely general. One of the most comprehensive attempts to classify woody plants on an adaptation basis has been made by Rehder (6). Included in the descriptions of most of the woody plants in the book is the number of the plant zone of North America in which the plant may be expected to thrive under ordinary conditions. For this purpose, his map of North America is divided into seven climatic zones running nearly parallel to the southern boundary of the area. His cultural directions as to the zone of adaptation for each plant arc very conservative as evidenced by the fact that many of the plants are found growing well in zones farther north than is indicated in the description.
Proceedings of the Iowa Academy of Science
©1941 Iowa Academy of Science, Inc.
Aikman, J. M. and Boyd, Ivan L.
"Adaption Studies of Plants for Soil Conservation Purposes in Southern Iowa,"
Proceedings of the Iowa Academy of Science, 48(1), 117-121.
Available at: https://scholarworks.uni.edu/pias/vol48/iss1/13