Apparatus (10) or injecting soil treatment into soil includes a handle (17) and a manifold head (16) carried by the handle (17) for delivering soil treatment into soil. The manifold head (16) has a first set of high pressure nozzles (38) each configured to deliver a first volume of soil treatment into the soil at an operating pressure over an injection period and a second set of high pressure nozzles (102) each configured to deliver a second volume of soil treatment into the soil at the operating pressure over the injection period. The second volume of soil treatment is greater than the first volume of soil treatment.
