Weibull's original winter barley frost (Weibull 1261) - an example of natural selection for winter hardiness

barley calidad cebada crop yield cultivos de invierno culture d'hiver danemark denmark dinamarca disease resistance early maturation grain granos hordeum vulgare orge quality rendement des cultures rendimiento de cultivos resistencia a la enfermedad resistencia invernal variedades varieties winter crops winter hardiness