Water absorbing crystals are also called super absorbent polymer ( based potassium polyacrylate type ). It is a white granule polymer before absorbing water. And after absorbing, it can turn water gel-like this:
This kind of gel has strong stock water ability even under pressure. Another side, this stock ability is less than plants' root'.So guess what will happen when you put it into the soil? Yeah, it absorbs water when it is rain and releases the water to plant when plants need. So you can find there's a big difference like this :
The super absorbent polymer can be widely used in agriculture, forestry, and gardening, such as soil water retention agent, seed coating, soil-less cultivation, artificial turf, etc.
–Improve seed germination and emergence to give plants an early, healthy start.
–Save the irrigation, increase crops and fruit yield.
-It contains Potassium, Phosphorus Nitrogen and releases the fertilizer efficiency slowly.