Dust Bowl, Dirty Thirties: LS of beef cattle grazing in prairie meadow. LS PANs over cattle grazing. HA PAN over prairie stubble. MSs of man walking through area of parched, swelled sand dunes. LS of small prairie town with grain elevators prominent, open prairie in foreground. LS PAN over prairie landscape. MLS of two tractors pulling harrows over newly cultivated prairie land. MLS to MS of crawler tractor and grader opening new irrigation ditch in field. Back view of same scene.