This experiment was carried out in the District of Morales, province and Department of San Martin, in the grounds of the National University of San Martin, located at 350 m.a.s.l. understood to a length of 76 ° 23' and South latitude 06 ° 29 ' with an average temperature of 25° C and a rainfall average of 1,200 mm/year. Soil present the following features textures franca arena, PH 6.0, phosphorus available 3.6 mg/Lt, saturation of aluminum 2.8%. The object of the study was to determine the source and best level of phosphorus for hand cultivation, using rock fosbayovar and triple super phosphate, also carry out economic analysis to its recommendation. It was used to cultivate peanut variety 'white Tarapoto' because they are a very important source of protein in the diet directly and transformed, likewise that it is cultivated traditionally in all the area of the region, still need to f...