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Jepson Field Book volume 28_156 | University and Jepson Herbaria Archives, University of California, Berkeley

 
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Title:
Jepson Field Book volume 28_156
Description:
Ecological Effects Variation of species due to external factors.  Cotton on silty river bank escapes frost at same time as that on heavy dark clay on the interior fields is killed by a killing frost, 31 degrees. County level, conditions all the same except soil. "The assumption is that the silty soil possesses the property of storing the sun heat during the day, and that this stored heat given out during the night protected the cotton from the frost temperature: and that the clay soil does not possess this property in the same degree." The frost came suddenly without preceding low temperatures to deprive the soil of previously stored heat.-Sci. 49:310. ::::::::: Jones, [?Mz?]
ID:
http://ucjeps.berkeley.edu/images/fieldbooks/volume_28/img409.jpg
Repository:
University and Jepson Herbaria Archives, University of California, Berkeley
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