What properties of super absorbent polymer make it desirable for agricultural application?

Super absorbent polymers or hydrogel are used in agriculture due to t’s properties such as high absorption capacity in saline and hard water conditions, lowest soluble content and residual monomer, high durability and stability in the swelling environment and during storage, low price , pH‐neutrality after swelling in water, gradual biodegradability without formation of toxic species and re‐wetting capability.