Abstract: The nozzle structure for a root feeding device includes a ground inserting tube or pipe having a nozzle unit at the end thereof formed with an axially extended bore and radially extended fluid discharge passages intermediate the ends thereof. The nozzle unit is generally comprised of a pair of coaxially aligned cone sections with the outer cone section of a reduced size and the outlets of the radial passages positioned between the adjacent ends of the cone sections. The fluid discharged from the outer end of the axial bore acts to pre-soften or lubricate the soil for hard ground penetration; and the fluid from the radial passages assists penetration and is discharged into a receiving chamber formed about the nozzle unit, when in the soil, for ground dispersion annularly about the nozzle unit.