Climatic conditions of the year and their influence on the formation of spring barley yield

abonos npk air temperature analyse statistique cantidad de semilla requerida crop yield cultivos de primavera culture de printemps engrais npk essai germinability grain granos hordeum vulgare muestreo npk fertilizers offshoots plant population poder germinativo precipitation pruebas rejet rendement des cultures rendimiento de cultivos retono sampling seeding rates spring crops statistical analysis temperatura del aire trials variedades varieties