Synopsis
Uses time - lapse photography to show how water moves into and through unsaturated soil. Points out how strata, such as hard pans or coarse sand layers, slow down the advance of a wetting front and how saturated and unsaturated flow differ. Dye tracks illustrate how soluble fertilizers move in irrigation furrows. Traces the history of western movies from their earliest form in The Great train robbery to such recent films as High noon and the TV series Gunsmoke. Describes the evolution of the…
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Details
- Running time
- 30 minutes
