Fig. 1. Photograph of weighing system positioned around a container to be weighed: (A) pneumatic cylinder, (B) hanging scale, (C) support frame, (D) lifting arm apparatus, (E) 45-L container filled with soil, (F) trigger mechanism for activating the pneumatic cylinder connected to compressed air source, (G) bent plate to catch container handle during lifting, (H) close-up view of one end of the top horizontal bar, and (I) middle "U"-shaped support tubing attached to upright frame.