Effect of plant spacing on yield and quality of some broccoli varieties. Early season crops 1998-2000

brassica oleracea italica broccoli brocoli calidad color colour conduite de la culture couleur crop management crop performance crop yield cultivos de primavera culture de printemps ensayos de variedades espacement espaciamiento manejo del cultivo noruega norway performance de culture quality rendement des cultures rendimiento de cultivos spacing spring crops variedades varieties variety trials