The depression of the 1930s had an early effect on the state of Oregon. A
decline in timber and agricultural production resulted in severe unemployment in the
late 1920s. State and local charitable organizations attempted to care for the
unemployed but they did not have the financial resources to do...
Prevention of groundwater contamination by agricultural
chemicals requires an understanding of the complex
processes that control pesticide movement below the soil
surface. Through this understanding it is possible to try
to predict which areas may be most vulnerable to
contamination. The many models that have been developed to
characterize pesticide...