This research work was carried out in the Aucaloma's experimental field of the UNSM County of Lamas San Martin (Perú) geographically located at 6º29' South latitude 76º 21' West longitude and 650 mt.s.l.o. (sea level over). To evaluate the effect of amends calcium magnesica 15 doses in the yield of the peanut crops and to carry out the beast treatments economic analysis was the experimental means. The statistical design of randomized complete block was used with four repetitions and 15 treatments. To check the studied variables, the variance analysis and the 0.05 % probability Duncan test was used. The floor characteristics were> sandy franc texture, sour reaction (pH = 5. 72) half content of organic matter (3.22%) wilt phosphorus readiness (12 pfm) lower content of interchangeable cations an saturation of high relatively aluminum (67.5%). Those: o.o, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5...