Barreno Avila, E.M., Córdova Suárez, M.A., Vargas López, J.H. and Calderón Valdiviezo, M.D. 2020. Water hyacinth (Eichhornia Crassipes (Mart.) Solms) and water duckweed. (Lemna Spp.) to reduce the hardness of irrigation water. ConcienciaDigital. 3, 1.1 (Feb. 2020), 133-146. DOI:https://doi.org/10.33262/concienciadigital.v3i1.1.1136.