Effect of the number of fertile tillers on the yield structure in spring wheat plants

agronomic characters anatomia anatomie anatomy cereales cereals crops cultivos cultivos de grano developmental stages economic plants etapas de desarrollo etapas de desarrollo de la planta grain crops macollamiento plant anatomy plant developmental stages plantas plante plante de culture plants productividad productivity profitability rendement rendimiento rentabilidad spring wheat tallage tillering trigo trigo de primavera wheats yields