Controlling Release of Fertilizer Constituents by Means of Coatings and Capsules¹

Abstract

Synopsis Placement of fertilizers in polyethylene capsules effectively controlled the rate of release of the fertilizer constituents for corn and Kentucky bluegrass in the field, but did not significantly increase yield or recovery of the constituents. In the greenhouse, significant increases in recovery of N were obtained by corn for (NH 4 ) 2 SO 4 coated with wax and pelleted, but yields were not significantly affected.