Production of Pinus pseudostrobus seedlings in nurseries in compost based on Shiitake waste Egileak: Romero-Arenas, Omar, Flores Flores, Adriana del Pilar, Rivera Tapia, José Antonio, Hernández Aldana, Fernando, Parraguirre Lezama, José Filomeno Conrado, Villa Ruano, Nemesio, Landeta Cortés, Gerardo