This bulletin presents the facts compiled by the soil conservation survey of Polk County, together with the interpretation of these facts in relation to proper land use and treatment.

This publication gives information on collecting, preserving, handling, mounting, and labeling insect specimens, on subsequent care of collections, and on recognition of the general insect groups or orders. It has been prepared in response to numerous requests from farmers, students, servicemen, and other individuals and groups interested in obtaining first-hand knowledge of insects by collecting them.