The effect of soil preparation on the quality of spring malting barley

amidon analyse de sol aradura chemicophysical properties contenido proteico cultivos de primavera culture de printemps date de traitement depth fecha de tratamiento grain granos harrowing hersage hordeum vulgare labour malt malta (producto) ploughing profondeur profundidad protein content rastreo rendement rendimiento rolling roulage rulado seedbed preparation soil testing spring crops starch treatment date yields