The present investigation work was carried out in the experimental fields of the Experimental station The Future", located in the Km 14.5 of the highway Fernando Belaunde Terry South, district of Juan Guerra, County of San Martin and Region San Martin (Peru); located to a South latitude of 6º 35', geographically longitude of 76º 30' and toan altitude of 232 m.s.n.m. With the purpose of finding a good dose of nitrogen and an appropriate between density in the cultivation. of corn variety ACROSS it was carried out the experiment, being evaluated the effect of three fertilization levels Nitrogenum and three densities on the yield of the cultivation of the area of Bajo Mayo. The used nitrogen doses. were 130, 150 and 170 Kg/ha and the densities of seeded of 50000, 62500 and 70000 plants/he, being applied the nitrogen in two fractions, the first one to the 1 O days after the betw~en, and th...