| abstract |
Described herein is a method of making a fertilizer granule. The method includes supplying a fertilizer component, an liquid component, a binder and a filler to a zoned extruder comprising a die head, a screw, and at least three zones; mixing the fertilizer component, liquid component, binder and filler to yield a thixotropic mixture; and passing the thixotropic mixture through the die head. |