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The work was developed in the parcel Ñico López. The valued cultivation was the lettuce variety Black simpson, with the objective of evaluating the goods of three (3) bioestimulantes (Biobras 16, Biobras plus and Quitosana), about the yield and quality of the crop. The biostimulants was applied, to three stonemasons (one for biostimulant) to the six days after transplant (DDT) and three parcel to the seven DDT, leaving one stonemasons that as control, for an total seven (7) treatments. The main components of yield were measured and some components of the quality of the plant were determined in the Soils Province Laboratory The data were processed by the statistical package of the Statitic version 8 on Windows. One could observe that the three biostimulants has an effect positive on the mass and quality of the studied crop.