a. East 1004 looking west.

b. East 1010 looking east.

c. East 1014 looking east.

Figure 6 . Arbitrary Unit 1 North-south profiles. Layers: 1a, plow zone, a mix of black organic silty loam, humus, and underlying clay with sand; 1b, black silty loam with humus, mainly filling soil cracks; 3a, yellowish-brown to yellowish-gray clay with abundant quartz sand inclusions.