June 2018, NRCS Field Day at Spring Coulee Farm … The rainfall simulator sprays 5 trays of soil from different cultivation practices. The jars in front hold runoff water; the back row of jars show the water that has been able to move through the soil. Our SCF soil tray is on the far right side and has almost no runoff. I was pleasantly surprised. The soil tray that is second from the left, the tray with the most (and dirtiest) runoff, came from continuously tilled ground.