DES MOINES, Iowa (AP) — Iowa farmers are off to slow start in planting corn as cool, wet weather hampers the progress. The U.S. Department of Agriculture says nine percent of Iowa’s corn crop is now planted, behind the five-year average of 16 percent. Less than one percent of the soybean crop is in the ground. The USDA says last week’s weather was unfavorable for planting, and farmers are waiting for fields to dry out. However, the rain improved soil moisture, with topsoil at 88 percent adequate or surplus. Subsoil moisture also improved. Temperatures ranged from the upper 20s to the 70s The report says normal rainfall during the week, just shy of an inch, was exceeded in the northern half of Iowa and came up short in the southern half.