Fig. 1. Effect of K application on growth rate of Tifway bermudagrass during 1997 and 1998. Single degree of freedom contrasts were generated with the SAS GLM Proc. *, *** at P 0.05 and P = 0.001 and nonsignficant (NS) at P > 0.05. Rest refers to the average of treatment means larger in magnitude than the one in the contrast.