Fig. 4. Photos of cross sections from plots with high and low infiltration rates. The blue dye (not visible in black-and-white copies of this figure) was added to the ponded water for 10 min before the water was removed. The 31 mm h^–1 example was a 20-cm diameter cylinder in a plowed treatment in wheat stubble. The 112 mm h^–1 example was a 30-cm cylinder in a no-till treatment in seedling winter wheat.