Limits for sugar beet cropping frequency in different habitat conditions

beta vulgaris calidad clay soils crop rotation crop yield environmental factors facteur du milieu factores ambientales feuille field experimentation fructofuranosidasa fructofuranosidase habitat habitats hojas leaves loam soils monocultivo monoculture poland pologne polonia quality racine rendement des cultures rendimiento de cultivos roots rotation culturale sandy soils soil texture sol argileux sol sableux sol sablolimoneux statistical methods sucre suelo arcilloso suelo arenoso suelo franco sugar textura del suelo texture du sol