... which have a great ability in absorbing water,called SAP.It can repeatedly absorb water for about 4 years. ... constantly absorbing, releasing water and fertilizer.Fragreen Agriculture and Forestry SAP is widely used in the field like,agriculture, foresty , ... ammonia,carbon dioxide,water and potassiumion.Fragreen Agriculture and Forestry SAP can greatly reduce the watering period in agriculture, forestry ...