The effect of amount and timing of S on grain yield and quality of winter wheat

abonos abonos sulfurados application date azufre calidad cultivos de invierno culture d'hiver date d'application deficiencia de minerales engrais fertilizers gliadin grain granos mineral deficiencies mineral nutrients nutrientes minerales nutrition des plantes plant nutrition prolaminas prolamine prolamines quality soufre sulphur sulphur fertilizers trigo triticum triticum aestivum wheats winter crops