ACC deaminase Freundlich Langmuir Mediterranean soils PGPR PTE Research & information: general Technosols acid soils adsorption alkaline soils anthropogenic soils biochar biochar application rates cadmium contaminated paddy soil desorption diffusive gradients in thin films (DGT) enrichment factor fertilizers heavy metal availability heavy metal stress heavy metals lead metal accumulation metal dissociation time (Tc) nitrogen nutrients optimised linear model redox