The effect of paper mill sludge on chemical properties of acid soil

The effect of paper mill lime sludge as acid soil amendment in an experimental study was investigated. Sludge used contained 58.4% calcium carbonates plus a small amount of heavy metals. An incubation study was conducted with an acid soil for up to 90 days and the treatments included various amounts of sludge. Results indicated a promising potential for paper mill sludge to be used as an inexpensive source of available lime for correction of soil acidity.