Abstract: A cultivator-injector machine for sub-surface application of fluid to a field which machine includes a chassis carrying one or more tines, each tine having one or more fluid delivery pipe(s) mounted extending longitudinally down a rearward, in use, face thereof, each delivery pipe having a closed lower end and one or more lateral apertures therein, the chassis further carrying one or more free-turning cutting discs, each mounted closely in front of and substantially aligned with a respective tine along the axis of ploughing motion of the machine.