Fig. 1. Partitioning of soil Pb by the Berti and Cunningham procedure (1996) after soils had been amended and incubated for 30 d. Treatments were as follows: 1, control soil; 2, compost; 3, high Fe compost; 4, high Fe compost + lime; 5, compost + lime; 6, raw biosolids; 7, pellet biosolids; 8, ashed biosolids; 9, N VIRO biosolids.