Measurement of model crop management practices of spring barley | Vyhodnoceni modelovych pestebnich technologii jarniho jecmene

abonos nitrogenados application rates barley cebada conduite de la culture cost benefit analysis costos costs crop management crop yield cultivos de primavera culture de printemps dosage dose dose d'application economic analysis efficiency eficacia energy balance fertilisation fertilizer application field experimentation hordeum vulgare manejo del cultivo modelos vegetales nitrogen fertilizers orge plant models rendement des cultures rendimiento de cultivos spring crops temps tiempo time