Plant ecology -- Arizona

Glass plate negatives from the Cochise County Agriculutral Extension, largely in part dealing with tree care, animal husbandy, prairie dog problems, tomatoes, and several untitled glass plates. Plates are undated.

This collection contains chiefly correspondence, along with reports, minutes of meetings, and financial records related to the establishment, development, and operation of the Desert Laboratory and Coastal Laboratory under directors Daniel T. MacDougal and Forrest Shreve.