[Agricultural and territorial trends of the most marginal area of Apulia region: the Sub-Appennino Dauno. First remarks in the light of new censuses of agriculture and population]

agricultural censuses agricultural sector agricultural workers apulia censimenti agricoli censimenti della popolazione censos agrarios demografia demographie demography densità della popolazione gross agricultural product highlands lavoratori agricoli less favoured areas llanuras migration urbaine pianure plaine plains popolazione rurale population censuses population density population rurale pouilles prodotto agricolo lordo producto agrario bruto produit agricole brut puglia recensement agricole recensement de la population rural population secteur agricole sector agrario settore agricolo surface surface area travailleur agricole urban rural migration zonas desfavorecidas zone svantaggiate