This two-year field trial on forage plots compared the relative effectiveness of surface applications of cement kiln dust (CKD) with lime for increasing forage yield. Seven soil treatments, in four blocks, were established at four low pH sites, which were: 1) a check plot; 2) lime at the recommended application (L), based on soil test for each site; 3) lime at 1.5 × L; 4) CKD at L; 5) CKD at 1.5 × L; 6) CKD at an equivalent to lime basis; and 7) CKD applied at 1.5 times the equivalent to lime basis, where equivalence was based on CKD's apparent neutralizing value equal to 75% that of lime. Yield was determined once through the growing season. In both years, CKD application was found to increase forage yields. Application of lime, however, did not improve forage yields either in 1998 or 1999. As a matter of fact, the lowest forage yields were where lime had been applied at 1.5 times the recommended rate.