SURFACE OF THE BAD LAND: CRUST FORMED AFTER IRRIGATION: 

 TRUCKEE-C ARSON EXPERIMENT STATION, 1908. DEPT. OF AGR. 



TWINING AND SLICING HARROW FOLLOWED BY CORRUGATED ROLLKR: 



PREPARING SEED BED: TRUCKEE-CARSOX EXPERIMENT STATION, igoS. 



DEPT. OF AGR. 



