Reclamation field trials commenced in 1985, two years before the granting of the Mining Licence. The level of pasture
production on varying soil depths (0 cm, 5 cm, 15 cm and 25 cm) overlying both tailings and oxidised waste overburden
was assessed. After seven years, the rate of increase of N, C, P and S, losses of S and P and pH changes were investigated on the plots
where grass seed was sown into bare tailings. It was determined that on these plots it would take approximately 24 years
to reach the original carbon and nitrogen levels at the mine site.