Evaluation location: Texas, United States
Plant response of crimson clover (Trifolium incarnatum) to high pH was measured by iron-deficiency chlorosis. Soil - Parrita SCL pH 7.9 DTPA extractable Fe 2.51 (low) evaluated an unequal number of seedlings, grown in Cone-Tainers using Wei et al. (1994) modification of the Gildersleeve and Ocumpaugh procedure. Main modification was to refrigerate the water used to saturate the soil. Koala and Karridale subclover were used as resistant and susceptible checks, respectively.