Crop Protection  America the beautiful – Iowa fields on the Fourth of July Jul 05, 2011 1. Rich, green corn is knee-high by the Fourth of July. 2. An early-morning look at corn on the back roads of western Iowa 3. S-curve and tree lines make a lovely scene. 4. Terracing is widely used in western Iowa to handle soil and water erosion. 5. Contour farming adds visual interest to a soybean field. 6. Conservation to the max, with terracing, contour planting and minimum tillage 7. Iconic red barn adds interest to a lush green field and farm site. 8. Country road remains the hallmark of rural Iowa.