Sand Stone And Artificial Reefs Filled With Slow-Release Fertilizer

摘要

The present invention relates to a sandstone and artificial reef filled with a slow fertilizer so that fertilizer can be eluted over a long period of time by drilling a sandstone or artificial reef to a predetermined size and then filling the slow fertilizer. The present invention is an artificial reef that uses concrete, sand, soil, rock, clay, mackrock, or mica as a raw material, and a plurality of perforated holes are formed on the surface of the artificial reef, and the perforated hole is filled with a slow fertilizer. Provide artificial reef.