Hidratated open cell phenolic foam as a mean to mitigate water stress in Pinus leiophylla seedlings Egileak: Palacios-Romero, Abraham, Rodríguez-Laguna, Rodrigo, Razo Zárate, Ramón, Meza-Rangel, Joel, Prieto-García, Francisco, Hernández Flores, María de la Luz