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Excerpt from Insects: Identification and Management in Illinois Soybean production in Illinois has climbed steadily from million bushels in 1924 to almost 369 million bushels in 1979. This increase resulted from a threefold improvement in yields and an 85-fold expansion in the acreage planted. Today, soybean is a mainstay of Illinois's economy, accounting for a third of the total cash farm income. With roughly 40 percent of the farmland planted to soybean, the crop may be found over much of the state's square miles (fig. A relatively long state (382 miles), Illinois covers a wide range of latitudes with noticeable differences in climate, soil type, topography, and natural plant cover. Soybean growing conditions vary accordingly from one part of the state to the next. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.