NEARLY ALL OF LASTE WEEK WAS SUITABLE FOR FIELD WORK, ACCORDING TO THE WEEKLY CROP REPORT FROM THE IOWA DEPARTMENT OF AGRICULTURE.  TOPSOIL MOISTURE FELL TO 62% ADEQUATE TO SURPLUS, AND SUBSOIL MOISTURE DROPPED TO 64% ADEQUATE TO SURPLUS.  THE CORN CROP IS RATED 80% GOOD TO EXCELLENT, AND SOYBEANS ARE 75% GOOD TO EXCELLENT.