Ground injection apparatus

摘要

Ground injection, e.g. aeration, apparatus adapted to be mounted on or drawn by a tractor and comprising one or more tines (12) reciprocated vertically by a crank (13) and crank shaft (13a) driven from a motor (14). Each tine (12) defines an internal passage (27) with outlet apertures (28). A piston rod (19) connected to each tine and to a cylinder (21) has a piston (20) which forces air into a reservoir (23) and via a line (25) into the passage (27). The mechanism is timed such that a pulse of air is injected into the ground through outlet apertures (28) at the position of maximum penetration of the ground by each tine (12). Instead of air, a liquid or other gaseous substance may be injected into the ground where it is penetrated by each tine. The apparatus may include two or more rows of such tines and associated injection means. <IMAGE>