Yield and grain quality of winter wheat varieties depending on agricultural level

analytical methods calidad caracteres de rendimiento composante de rendement contenido proteico crop yield cropping systems crops cultivos cultivos de invierno culture d'hiver field experimentation gluten plante de culture poland pologne polonia protein content quality rendement des cultures rendimiento de cultivos sistemas de cultivo statistical methods technique analytique triticum aestivum variedades varieties winter crops yield components