Determining Critical Soil pH for Grain Sorghum Production

Table 2

Initial soil pH values of each trial location and the amount of hydrated lime and alum (Mg ha⁻¹) required to change soil pH by 1.0 unit.

Location	Initial soil pH	Mg ha^−1 hydrated lime 1.0 pH change	Mg ha^−1 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