Fig. 7. Cone penetration resistance in and out of tracks in chisel and chisel plow treatments. Treatments are: WT-IN (in wheel tracks—no chisel plow), WT-OUT (out of wheel tracks—no chisel plow), WTC-IN (in wheel tracks—chisel plowed), and WTC-OUT (out of wheel tracks—chisel plowed). At selected depths, bars with the same letter are not statistically different at P < 0.05 according to the LSD test.