Table 2: Initial soil pH values of each trial location and the amount of hydrated lime and alum (Mg ) required to change soil pH by 1.0 unit.

Location Initial soil pH Mg  hydrated lime 1.0 pH change Mg  alum 1.0 pH change Perkins, OK 4.86 1.69 1.52 Lahoma, OK 5.5 1.31 2.78 Haskell, OK 5.2 4.1 2.17