liquid applications of materials such as herbicides usually are broadcast over the field and then incorporated by harrowing or the like . the present device utilizes a plurality of open based boxes having a rotary cultivator therein with a spray nozzle attached to a supply of liquid chemical under pressure thus restricting the application of the chemical to a band the width of the box and incorporating it at the same time . rake teeth smooth out the soil behind each applicator and a seeding or planting machine may be hitched behind the incorporator followed by a packer so that the entire chemical treatment , incorporation thereof , planting and packing can be undertaken in one pass over the field .