“Effect of Calcium Dose, for the Yield of Cultivation of Vainite (Phaseolus vulgaris), in the District of Barranca. Province of Barranca, Lima Region”. Aporte Santiaguino, vol. 12, no. 1, Aug. 2019, pp. Pág: 45-58, https://doi.org/10.32911/as.2019.v12.n1.606.