Implements for injecting substances below the surface of the soil

Apparatus for injecting slurry beneath a soil surface comprising

• a rigid frame adapted to be traversed over the soil in which the slurry is to be injected;
• a tine displaceable through said soil in a predetermined direction of travel in a vertical plane containing said direction of travel through the soil and including a substantially straight working shank portion provided with a longitudinally extending duct, said shank portion being adapted for extending into the soil;
• a pivotal mounting means for mounting the tine on the rigid frame to permit the tine to rock in the said vertical plane;
• a loading spring for biasing the tine to a working attitude in which the straight working shank portion inclines to the surface of the soil at an acute angle;
• a generally upwardly convex arched shoe increasing in height and width from front to rear relative to said direction of travel and secured to the tine and including a top provided with an aperture registering with the duct in the shank portion of the tine;
• means for feeding slurry into the duct;
• a vibrator means on the shank portion of the tine for inducing vertical vibrations therein;
• and
• a reaction lever pivoted on the rigid frame and extending rearwards relative to said direction of travel to a point behind the tine and including an anchorage for the loading spring so located as to urge the rear end of the reaction lever downwardly against the soil under the reaction force of the loading spring.