residual acidity from pyrite oxidation and hydrolysis. Three
fertiliser treatments were established for comparative purposes
comprising the following treatments (Table 2): mineral
fertiliser (100 N/100 P/100 K kgha−1), compost (100 kgNha−1)
and a mixture of both (50 N/50 P/50 Kkgha−1 as mineral fertiliser
+ 100 kgNha−1 as compost)