If agriculture soil is amended with poultry waste which is a source of heavy metal contamination, usually low pH is suitable for HM uptake but in my study pH (6-7) is increasing as well as HM uptake.What could be possible explaination for this?
It largely depends on the soil biota. For example, the type of microbial population and their ability to disintegrate the pollutant. Also, environmental factors can significantly influence the plant uptake.