The experiment was developed in the farm of the National University of St Martin Cacatachi District, Province And Region St Martin, with a geographical location: South latitude, 06 ° 25, length west 76 ° 00 ', and an altitude of 328 m.s.n.m, in a clayey soil of texture, with medium availability of elements (N, P, K, Ca Mg). The aim (lens) was: Determines the effect of the climatic variability and its incident in the planning of the agricultural activities of small campaign in the culture (culturing) of maize (corn), in Cacatachi district. The used design was of block Randomized (DBCA), With 3 repetitions and 4 ttos, using 12 experimental units; they were studied 4 epochs of sowing (August, September, October, November) to determine the best adapted month to sow in the small campaign, to the shaded ones I do not apply any type of irrigation to be able to determine the production to the ...