Evolution of the Protected Diffusion Zone (PDZ)

from

1. The Closed Insulated Production System (CIPS) with fertilizer placed on the top surface of the media and protected from evaporative and gravitational water flow pathways by the impermeable lid and sidewalls of the CIPS to
2. The Conserver inserted through the plant collar or the Conserver placed in the pouch opening upward to extend the protected dif-fusion zone (PDZ) to
3. The Conserver in the open container acting solely as a shield for the fertilizer contained within the upper end and diffusing downward within the diffusion tube (PDZ) to
4. The Conserver to provide a PDZ for fertilizer in landscape or field applications.