Alpine fruit farms usually ensure their production against hail risk; more rarely prevent the damage by using anti-hail nets. To explain the choice between the two alternatives for defence of fruit production against the hail risk, insurance and anti hail-nets, was developed a model that...

TThe site-chronological regime identifies a sequence of sites to which the pollination service is allocated during the annual biological cycle of the hive. Because each foraging site corresponds to a crop or a wild vegetation, each site-chronological regime identifies a sequence of crops or a...