Photograph of Norman Fischer, one of Louis Fischer’s three sons who operate a farm with him, shows how a sub-surface tillage implement operates, cutting weed roots, loosening soil and mixing residue into the surface. This type of equipment is coming into greater use as a means of controlling wind erosion in western Oklahoma blowing areas. This tillage also helps control water erosion which Norman says sometimes does more damage more quickly than wind erosion. OK-10, 721.

Photograph of Fischer’s Wheat Bowl Farm, Hooker, Oklahoma. side view showing V-shaped shovels or blades of sub-surface tillage implement of the kind used exclusively by the Fischers (See OK-10, 721-23). II HP 2X. OK-10, 724.

Photograph showing the V-shaped shovels of blades of a subsurface tillage instrument up out of the soil (see OK-10-721 and 10-722). II HP 2-X. OK-10-723.