TY - Generic T1 - Effects of past sewage sludge additions on heavy metal availability in light textured soils: implications for crop yields and metal uptakes Y1 - 2003 A1 - Bhogal, A A1 - Nicholson, F. A A1 - Chambers, B. J A1 - Shepherd, M. A JF - Environmental Pollution IS - 121 ER -