{"id":1790,"date":"2016-11-21T11:54:23","date_gmt":"2016-11-21T10:54:23","guid":{"rendered":"http:\/\/www.supagro.fr\/wordpress\/modeleco\/?page_id=1790"},"modified":"2018-12-10T22:14:02","modified_gmt":"2018-12-10T21:14:02","slug":"activite-14a-rotation-des-cultures","status":"publish","type":"page","link":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence2\/cours2-des-specificites-du-modele-agricole\/lecon14\/activite-14a-rotation-des-cultures\/","title":{"rendered":"Activity 15A : \u00ab Centre-Val de Loire \u00bb model \u2013 Rotations as a cropping pattern constraint"},"content":{"rendered":"

Length : around 40 minutes<\/u><\/h4>\n

 <\/p>\n

Write the following model.<\/strong><\/p>\n

An arable crop farmer growing special crops in the Centre-Val de Loire region (data INOSYS Syst\u00e8me GC 131 ) has 110 ha of land. Irrigation and the economic environment of his farm offers him a large range of production options : soft wheat, durum wheat, spring barley, potatoes for human consumption, sugar beets and rapeseed. Five of these crop types are irrigated in order to ensure high quality regular production. The farmer has 60 000 m3 of water.<\/p>\n

Irrigation needs and economic data are shown in the table below :<\/strong><\/p>\n

Irrigation<\/strong><\/p>\n\n\n\n\n\n\n\n\n
Crops<\/td>\nVolume in m3\/ha<\/td>\n<\/tr>\n
Soft wheat<\/td>\n175<\/td>\n<\/tr>\n
Durum wheat<\/td>\n350<\/td>\n<\/tr>\n
Spring barley<\/td>\n700<\/td>\n<\/tr>\n
Potato for human consumption<\/td>\n1800<\/td>\n<\/tr>\n
sugar beet<\/td>\n1750<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n


\nTechnico-economic data<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n
Crops<\/td>\nYields (qx\/ha)<\/td>\nPrices\/qx (\u20ac)<\/td>\nTotal costs (\u20ac\/ha)<\/td>\n<\/tr>\n
Soft wheat<\/td>\n85<\/td>\n16<\/td>\n460<\/td>\n<\/tr>\n
Durum wheat<\/td>\n71<\/td>\n28<\/td>\n565<\/td>\n<\/tr>\n
Spring barley<\/td>\n70<\/td>\n17.5<\/td>\n470<\/td>\n<\/tr>\n
Potato for human consumption<\/td>\n495<\/td>\n14<\/td>\n4210<\/td>\n<\/tr>\n
sugar beet<\/td>\n950<\/td>\n2.6<\/td>\n1082<\/td>\n<\/tr>\n
Rapeseed<\/td>\n40<\/td>\n38<\/td>\n490<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Source\u00a0: from the Syst\u00e8me GC 131 of the INOSYS network of agricultural chambers in the Centre Val de Loire region. 2016.
\nFor agronomic reasons,<\/strong>
\n\u2013 Oilseed crops cannot be grown more than once every three years on the same plot,<\/strong>
\n\u2013 cereal crops cannot be grown two years in a row on the same plot,<\/strong>
\n\u2013 and sugar beets or potatoes can only be cultivated once every six years.<\/strong><\/p>\n

What is the optimum cropping pattern for this farmer ? What is his optimum income ?<\/strong><\/p>\n

 <\/p>\n

Then check the solution:<\/strong> \u00a0\"solution\"<\/a><\/strong><\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Length : around 40 minutes   Write the following model. An arable crop farmer growing special crops in the Centre-Val de Loire region (data INOSYS Syst\u00e8me GC 131 ) has 110 ha of land. Irrigation and the economic environment of Continue reading Activity 15A : \u00ab Centre-Val de Loire \u00bb model \u2013 Rotations as a cropping pattern constraint<\/span>→<\/span><\/a><\/p>\n","protected":false},"author":92,"featured_media":0,"parent":400,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1790","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1790","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/users\/92"}],"replies":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/comments?post=1790"}],"version-history":[{"count":22,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1790\/revisions"}],"predecessor-version":[{"id":4377,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1790\/revisions\/4377"}],"up":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/400"}],"wp:attachment":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/media?parent=1790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}