Constraints to cereal-based rainfed cropping in Mediterranean environments and methods to measure and minimize their effects

blé caracteres de rendimiento cereales cereals composante de rendement conduite de la culture crop management cropping systems céréale disponibilidad del agua eau disponible environmental factors environmental temperature facteur du milieu factores ambientales manejo del cultivo sistemas de cultivo système de culture temperatura ambiental température ambiante trigo water availability wheats yield components