The w and green check means hydric soils – not farmed. This is from the NRCS wetland maps. These maps are not all field checked. Dan Pierce makes wetland determinations in this office. This is a 1988 map.
DeKalb Land Company
Paul & Patti Brescia
624 Sandberg Dr., Sycamore, IL. 60178
Phone us at:  895-6800