This research paper was founded in the "San Luis" property of the ing. Jaime Montilla Sailing, located in the district of Cunumbuque, province of Lamas and region San Martin - Peru. lt was objective; determine a level of phosphate fertilization that will succeed in improving bean yields cowpea (Vigna unguiculata (l) Walp) in field, using the white variety Cumbaza INIA of cowpea, using the same density and planting in all treatments. The statistical design was DBCA with 4 repetitions and 6 treatments, each plot was evaluated, the results were analyzed by analysis of variance and the Duncan's multiple test. In the meteorological data are presented with an average annual rainfall between 1000 to 1400 mm and a mean annual temperature of 25 to 28 ºC. The experimental soil sample a clay textura! class, with an organic matter content of 2.27 %; pH moderately alkaline; in addition, with average...