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THE design equations for predicting the distributions of lateral pressures and friction forces in farm tower silos are described. Three cases are presented which take into account the mode of unloading operation and the wetness of the ensiled crop. A computer-aided design package is developed to expedite the numerical computations and the plotting of the pressure-depth curves. The package is comprised of three files: a program for performing the design calculations and graphing the pressure distributions on the monitor screen, a plotter program for hardcopy plots, and the reference manual. These programs are intended to be as self-explanatory and user-friendly as possible.