1.natural leonardite source 2.liquid concentrated 3.organic agriculture apply Potassium Humate Liquid Potassium Humtate Liquid is a liquid humic acid,derived from leonardite ... crops, fruit trees, landscaping, gardening and pasture alone or combining with elements of nitrogen, phosphorus,potassium and other trace elements.Product ... in 1L,5L,20L,200L or on requirement. Potassium Humtate Liquid