Apparatus for covering drainage tubing with fine textured soil granules

A device for covering drainage tubing with fine textured soil granules comprising a main framework, a pair of secondary frames mounted for swinging movement toward and away from one another about at least one vertically oriented axis, an adjustable connection between the main framework and the secondary frames including a motivator for varying the elevation of the secondary frames relative to the main framework, tiller means connected to the secondary frames including a pair of vertically oriented shafts, one journaled to each secondary frame, tines secured to and extending outwardly from each shaft, motivating means connected to rotate each shaft whereby the tines penetrate the side walls of a trench in which tubing has been positioned to thereby break away fine textured soil granules therefrom and shower them over the tubing, and a guide shoe connected to each secondary frame for engaging the side walls of the trench to thereby limit the penetration of the tines.