Productivity of orchard grass (Dactylis glomerata L.) alone and associated with perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.)

by María de los Ángeles Maldonado Peralta, Adelaido Rafael Rojas García, Nicolás Torres Salado, Jerónimo Herrera Pérez, Santiago Joaquín Cancino, Joel Ventura Ríos, Alfonso Hernández Garay, Filogonio Jesús Hernández Guzmán