... super absorbent polymer, water retain agent 1.Non-toxic,odorless,reusable,biological. 2.for garden ... is able to absorb, store and release water and nutrient for promoting plant growth even ... substrate to preserve water and nutrionts,small plants, agriculture and non-soil transportaion.There are ... 4 sizes,WRA-0,WRA-1,WRA-2,WRA-3 for forests,small plants,laying turf and ...