Influence of cropping system on sharp eyespot in winter wheat

abonos nitrogenados ammonium fertilizers aradura compactage du sol cultivation cultivo date de semis enfermedades de las plantas enfermedades fungosas fecha de siembra fungal diseases labour labranza maladie des plantes maladie fongique nitrogen fertilizers pathogens plant diseases plant population ploughing pratique culturale rhizoctonia rhizoctonia cerealis soil compaction sowing date tillage travail du sol trigo triticum aestivum wheats