Determining Critical Soil pH for Grain Sorghum Production

Table 1

Description of soil series at Perkins, Lahoma, and Haskell, Oklahoma.

Location	Soil series
Perkins, OK	Teller series (fine loamy, mixed, active, thermic Udic Argiustolls) and konawa series (fine loamy, mixed, active, thermic Ultic Haplustalfs)
Lahoma, OK	Grant series (fine silty, mixed, superactive, thermic Udic Argiustolls)
Haskell, OK	Taloka series (fine, mixed, active, thermic Mollic Albaqualfs)