Aiming to evaluate the effects of gel applied in a previous campaign was developed from research work on the residual effect of three treatments gel and three irrigation frequencies, executed between the months of March to May 2008, for: To evaluate the residual effect of three doses of potassium hidroabsorventes on the floor, with three frequencies of irrigation on the yield and quality of lettuce in the Province of San Martín Region Lamas, during March - May 2008 and carry out economic analysis of the treatments evaluated. In the research work, the design was a randomized complete block (DBCA), with 4 X 4 factorial with three points, 16 treatments. The statistical program used was SPSS 12 and obtained the following conclusions: Water consumption was greater in the T2 670.75 m3.ha-1In rainfall, but was lower compared to other treatments conducted without application of Hidroabsorventes...