The tendency of saline and sodic conditions to occur in patches makes soil reclamation and ideal practice on which to apply site-specific management (SSM). Site-specific management, also called precision agriculture, is the management of an agricultural crop at a spatial scale smaller than that of the individual field (Plant et al., 2000). The principle behind SSM is that in many fields the crop’s environment varies substantially from one part of the field to another. By adjusting management practices and input levels according to what is appropriate for local conditions the farmer can in principle save money, improve yield, and reduce unwanted environmental effects. The primary object of this study is to evaluate the effect of variable rate application of soil amendments on a cotton field having saline-sodic soil conditions. To aid in this evaluation, yield monitors mounted on commercial pickers were used to rapidly measure and geo-reference yield observations.