Abstract: A combined hydraulic cylinder and shock absorber used in combination with a cantilever supported boom having a plurality of longitudinally spaced discharge nozzles thereon for flowable material with one end of the boom being pivotally supported from a vehicle, or the like, for vertical adjustment in a vertical plane with the hydraulic cylinder enabling angular adjustment of the boom about a horizontal axis and including a structure which provides a shock absorber to dampen and cushion vertical oscillation or bouncing movement about a horizontal axis as the boom and vehicle traverse uneven terrain such as when applying liquid fertilizer or other flowable material agent to the soil.