With the purpose of determining the varieties of yield and adaptation, with characteristic agronomic desirable for the Central Huallaga; he/she put on in execution a experiment comparative of six varieties of Soya, all them proceedings from Bolivia; reaching the potential maximum of yield the variety IAC-8C with 4230.47 Kg./he of grain, without to be able to find difference signíficant statistic wíth the varieties OCEPAR-9, CRYSTALLINE-T, IAC-8, CRYSTALLINE with 3709.35, 3621.12, 3585.94, 3375.00 Kg/he respectively. The experiment in mention was carried out in the District of Caspizapa, Province of Picota, Region San Martín, in a soil Vertisol, fine texture, Potassium and Phosphorus middle, high saturation of bases. The disposition of the used experiment was at random of Complete Block with four repetitions, eight furrows twins and between plant to 0.20 m, being obtained a population ...