- Upcoming Events Tree + Vine Nov. 11, 2014 Turlock, CA Grape, Nut + Tree Nov. 18, 2014 Fresno, CA Colusa Farm Show Feb. 5-7, 2015 Colusa, CA Specially engineered and manufactured for the Blueberry & Raspberry industry; Northwest Tillers newest mulcher offers over 60 years of experience in manufacturing heavy duty tillers. This unit is designed for small spaces used in the berry industry with widths ranging from 48” to 84”. Due to the rugged design of all our equipment; it is capable of incorporating materials into the soil, including leaves and other prunings, anywhere from 2” – 8” in depth and leaves the floor in a firm and level condition. Blueberry / Raspberry Tiller Let us do a DEMO in your area!