{"id":1636,"date":"2016-11-09T14:11:46","date_gmt":"2016-11-09T13:11:46","guid":{"rendered":"http:\/\/www.supagro.fr\/wordpress\/modeleco\/?page_id=1636"},"modified":"2024-06-10T13:36:31","modified_gmt":"2024-06-10T11:36:31","slug":"activite-12b-desserrer-la-contrainte-de-travail-dans-un-modele-a-plusieurs-periodes","status":"publish","type":"page","link":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence2\/cours1-enrichir-le-modele-de-base\/lecon-12-contrainte-par-periode\/activite-12b-desserrer-la-contrainte-de-travail-dans-un-modele-a-plusieurs-periodes\/","title":{"rendered":"Activity 12B : \u00ab Wheat\/maize \u00bb model \u2013 i. Loosening the labour constraint in a multi-periodical model ii. Displaying results"},"content":{"rendered":"<h4 style=\"text-align: right\"><u>Length : around 30 minutes<\/u><\/h4>\n<p style=\"text-align: center\"><strong>i. Loosening the labour constraint<\/strong> <strong>\u00a0<\/strong><strong> <img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/files\/2017\/11\/N1-1.png\" alt=\"\" width=\"25\" height=\"24\" \/><\/strong><\/p>\n<p><script>\n                            if (window.qmn_quiz_data === undefined) {\n                                    window.qmn_quiz_data = new Object();\n                            }\n                    <\/script><script>window.qmn_quiz_data[\"46\"] = {\"quiz_id\":\"46\",\"quiz_name\":\"act12B\",\"disable_answer\":0,\"ajax_show_correct\":0,\"progress_bar\":\"0\",\"contact_info_location\":0,\"qpages\":{\"1\":{\"id\":\"1\",\"quizID\":\"46\",\"pagekey\":\"5PYuufi6\",\"hide_prevbtn\":\"0\"}},\"skip_validation_time_expire\":0,\"timer_limit_val\":0,\"disable_scroll_next_previous_click\":0,\"disable_scroll_on_result\":0,\"disable_first_page\":\"0\",\"enable_result_after_timer_end\":0,\"enable_quick_result_mc\":0,\"end_quiz_if_wrong\":0,\"form_disable_autofill\":0,\"disable_mathjax\":0,\"enable_quick_correct_answer_info\":0,\"quick_result_correct_answer_text\":\"Correct! You have selected correct answer.\",\"quick_result_wrong_answer_text\":\"Wrong! You have selected wrong answer.\",\"quiz_processing_message\":\"\",\"quiz_limit_choice\":\"Limit of choice is reached.\",\"not_allow_after_expired_time\":0,\"scheduled_time_end\":false,\"prevent_reload\":0,\"limit_email_based_submission\":0,\"total_user_tries\":0,\"is_logged_in\":false,\"error_messages\":{\"email_error_text\":\"Not a valid e-mail address!\",\"number_error_text\":\"This field must be a number!\",\"incorrect_error_text\":\"The entered text is not correct!\",\"empty_error_text\":\"Please complete all required fields!\",\"contact_field_required_error_text\":\"Please complete all required fields!\",\"url_error_text\":\"The entered URL is not valid!\",\"minlength_error_text\":\"Required atleast %minlength% characters.\",\"maxlength_error_text\":\"Maximum %maxlength% characters allowed.\",\"recaptcha_error_text\":\"ReCaptcha is missing\",\"phone_error_text\":\"Phone number is invalid\"},\"questions_settings\":[]}\n                    <\/script>\t\t<div class='qsm-quiz-container qsm-quiz-container-46 qmn_quiz_container mlw_qmn_quiz  quiz_theme_default  '>\n\t\t\t\t\t\t\t\t<form name=\"quizForm46\" id=\"quizForm46\" action=\"\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1636\" method=\"POST\" class=\"qsm-quiz-form qmn_quiz_form mlw_quiz_form\" novalidate enctype=\"multipart\/form-data\">\n\t\t\t\t<input type=\"hidden\" name=\"qsm_hidden_questions\" id=\"qsm_hidden_questions\" value=\"\">\n\t\t\t\t<input type=\"hidden\" name=\"qsm_nonce\" id=\"qsm_nonce_46\" value=\"cec395a5bf\">\n\t\t\t\t<input type=\"hidden\" name=\"qsm_unique_key\" id=\"qsm_unique_key_46\" value=\"6a534c0d07228\">\n\t\t\t\t<div id=\"mlw_error_message\" class=\"qsm-error-message qmn_error_message_section\"><\/div>\n\t\t\t\t<span id=\"mlw_top_of_quiz\"><\/span>\n\t\t\t\t\t\t\t<section class=\"qsm-page \">\n\t\t\t\t\t\t\t\t<div class=\"quiz_section qsm-question-wrapper question-type-7 question-section-id-259 \" data-qid=\"259\">\n\t\t\t\t\t<div class='mlw_qmn_question ' >\n\t\t<p>Answer the questions using the solutions of the <a href=\"https:\/\/www.supagro.fr\/ModelEco\/en\/modeles\/modelEco_labour1.zip\">labour1.gms<\/a> model (written in activity 12A or downloadable from the Model Library). <br \/><strong><br \/>What is the marginal value of labour in winter ? (Round off to a hundredth)<\/strong><\/p>\n\t<\/div>\n\t\t<input type=\"number\" class=\"mlw_answer_number \" id=\"question259\" name=\"question259\"   placeholder=\"\" \/>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"quiz_section qsm-question-wrapper question-type-7 question-section-id-262 \" data-qid=\"262\">\n\t\t\t\t\t<div class='mlw_qmn_question ' >\n\t\t<p><strong>What is the marginal value of labour in summer ? (Round off to a hundredth)<\/strong><\/p>\n\t<\/div>\n\t\t<input type=\"number\" class=\"mlw_answer_number \" id=\"question262\" name=\"question262\"   placeholder=\"\" \/>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"quiz_section qsm-question-wrapper question-type-0 question-section-id-265 \" data-qid=\"265\">\n\t\t\t\t\t<div class='mlw_qmn_question ' >\n\t\t<p><strong>In what season is it more advantageous for the farmer to hire workers ?<\/strong><\/p>\n\t<\/div>\n\t\t<fieldset>\n\t\t<legend><\/legend>\n\t<div class='qmn_radio_answers '>\n\t\t\t\t\t\t\t\t<div class=\"qmn_mc_answer_wrap  mrq_checkbox_class\" id=\"question265-1 \">\n\t\t\t\t\t\t\t\t\t\t\t<input type='radio' class='qmn_quiz_radio qmn-multiple-choice-input ' name=\"question265\" id=\"question265_1\" value=\"0\" \/>\n\t\t\t\t\t<label class=\"qsm-input-label\" for=\"question265_1\">\n\t\t\t\t\tSummer\t\t\t\t\t<\/label>\n\t\t\t\t\t \t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"qmn_mc_answer_wrap  mrq_checkbox_class\" id=\"question265-2 \">\n\t\t\t\t\t\t\t\t\t\t\t<input type='radio' class='qmn_quiz_radio qmn-multiple-choice-input ' name=\"question265\" id=\"question265_2\" value=\"1\" \/>\n\t\t\t\t\t<label class=\"qsm-input-label\" for=\"question265_2\">\n\t\t\t\t\tWinter\t\t\t\t\t<\/label>\n\t\t\t\t\t \t\t\t\t<\/div>\n\t\t\t\t\t \t\t\t<label style=\"display: none !important;\" for=\"question265_none\">None<\/label>\n\t\t\t<input type=\"radio\" style=\"display: none;\" name=\"question265\" id=\"question265_none\" checked=\"checked\" value=\"\" \/>\n\t\t\t\t<\/div>\n\t<\/fieldset>\n\t<input type=\"hidden\" name=\"answer_limit_keys_265\" value=\"\" \/>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"quiz_section qsm-question-wrapper question-type-7 question-section-id-268 \" data-qid=\"268\">\n\t\t\t\t\t<div class='mlw_qmn_question ' >\n\t\t<p><strong>In summer, what is the maximum price which the farmer is prepared to pay his workers ? (Round off to a hundredth)<\/strong><\/p>\n\t<\/div>\n\t\t<input type=\"number\" class=\"mlw_answer_number \" id=\"question268\" name=\"question268\"   placeholder=\"\" \/>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/section>\n\t\t\t\t\t<input type=\"hidden\" name=\"qmn_question_list\" value=\"259Q262Q265Q268Q\" \/>\n\t\t\t\t\t\t\t<div id=\"mlw_error_message_bottom\" class=\"qsm-error-message qmn_error_message_section\"><\/div>\n\t\t\t\t\t<input type=\"hidden\" name=\"qmn_all_questions_count\" id=\"qmn_all_questions_count\" value=\"4\" \/>\n\t\t\t\t\t<input type=\"hidden\" name=\"total_questions\" id=\"total_questions\" value=\"4\" \/>\n\t\t\t\t\t<input type=\"hidden\" name=\"timer\" id=\"timer\" value=\"0\" \/>\n\t\t\t\t\t<input type=\"hidden\" name=\"timer_ms\" id=\"timer_ms\" value=\"0\"\/>\n\t\t\t\t\t<input type=\"hidden\" class=\"qmn_quiz_id\" name=\"qmn_quiz_id\" id=\"qmn_quiz_id\" value=\"46\" \/>\n\t\t\t\t\t<input type='hidden' name='complete_quiz' value='confirmation' \/>\n\t\t\t\t\t\t\t\t\t<\/form>\n\t\t\t\t\t\t<\/div>\n\t\t<div style=\"display: none;\" class=\"qsm-popup qsm-popup-slide\" id=\"modal-4\" aria-hidden=\"false\"><div class=\"qsm-popup__overlay\" tabindex=\"-1\" data-micromodal-close=\"\"><div class=\"qsm-popup__container qmn_quiz_container\" role=\"dialog\" aria-modal=\"true\"><div class=\"qsm-popup__content\"><img decoding=\"async\" src=\"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-content\/plugins\/quiz-master-next\/assets\/clock.png\" alt=\"clock.png\"\/><p class=\"qsm-time-up-text\"> Time's up<\/p><\/div><footer class=\"qsm-popup__footer\"><button class=\"qsm-popup-secondary-button qmn_btn\" data-micromodal-close=\"\" aria-label=\"Close this dialog window\" onclick=\"location.reload();\">Cancel<\/button><\/footer><\/div><\/div><\/div><br \/>\n<strong><br \/>\n<\/strong><br \/>\nThe farmer now has the possibility of hiring workers at 10\u20ac per hour. Modify the <a href=\"https:\/\/www.supagro.fr\/ModelEco\/en\/modeles\/modelEco_labour1.zip\">labour1.gms<\/a>\u00a0model (which you can call travail2.gms)<\/p>\n<p><em>\u00ab\u00a0A given farm can grow three types of crop, wheat, maize and tomato, and use two crop practices, extensive and intensive. The area to be cultivated must be determined for each production-technology combination, knowing that :<br \/>\nThe objective of the farmer is maximize his income.<\/em><\/p>\n<p><em><br \/>\nWater needs are as follows : <\/em><\/p>\n<table width=\"305\">\n<tbody>\n<tr>\n<td width=\"115\"><\/td>\n<td colspan=\"2\" width=\"191\">Water needs (thousands of m3)<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Technology<\/td>\n<td width=\"93\">extensive<\/td>\n<td width=\"98\">intensive<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Wheat<\/td>\n<td width=\"93\">0<\/td>\n<td width=\"98\">2<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Maize<\/td>\n<td width=\"93\">4<\/td>\n<td width=\"98\">6<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Tomato<\/td>\n<td width=\"93\">3<\/td>\n<td width=\"98\">5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>Labour needs are as follows .<\/em><\/p>\n<table width=\"468\">\n<tbody>\n<tr>\n<td width=\"97\"><\/td>\n<td colspan=\"3\" width=\"371\">Labour needs (h\/ha)<\/td>\n<\/tr>\n<tr>\n<td width=\"97\"><\/td>\n<td width=\"179\">Technology<\/td>\n<td colspan=\"2\" width=\"192\">\u00a0Period<\/td>\n<\/tr>\n<tr>\n<td width=\"97\"><\/td>\n<td width=\"179\"><\/td>\n<td width=\"94\">Winter<\/td>\n<td width=\"98\">Summer<\/td>\n<\/tr>\n<tr>\n<td width=\"97\">Wheat<\/td>\n<td width=\"179\">extensive<\/td>\n<td width=\"94\">10<\/td>\n<td width=\"98\">5<\/td>\n<\/tr>\n<tr>\n<td width=\"97\"><\/td>\n<td width=\"179\">intensive<\/td>\n<td width=\"94\">15<\/td>\n<td width=\"98\">10<\/td>\n<\/tr>\n<tr>\n<td width=\"97\">Maize<\/td>\n<td width=\"179\">extensive<\/td>\n<td width=\"94\">10<\/td>\n<td width=\"98\">35<\/td>\n<\/tr>\n<tr>\n<td width=\"97\"><\/td>\n<td width=\"179\">Intensive<\/td>\n<td width=\"94\">10<\/td>\n<td width=\"98\">40<\/td>\n<\/tr>\n<tr>\n<td width=\"97\">Tomato<\/td>\n<td width=\"179\">extensive<\/td>\n<td width=\"94\">10<\/td>\n<td width=\"98\">70<\/td>\n<\/tr>\n<tr>\n<td width=\"97\"><\/td>\n<td width=\"179\">Intensive<\/td>\n<td width=\"94\">10<\/td>\n<td width=\"98\">90<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>Yields and costs are as follows : <\/em><\/p>\n<table width=\"494\">\n<tbody>\n<tr>\n<td width=\"115\"><\/td>\n<td colspan=\"2\" width=\"187\">Yield (ton\/ha)<\/td>\n<td colspan=\"2\" width=\"192\">Cost (\u20ac\/ha)<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Technology<\/td>\n<td width=\"93\">extensive<\/td>\n<td width=\"94\">intensive<\/td>\n<td width=\"94\">extensive<\/td>\n<td width=\"98\">Intensive<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Wheat<\/td>\n<td width=\"93\">4.5<\/td>\n<td width=\"94\">5.0<\/td>\n<td width=\"94\">250<\/td>\n<td width=\"98\">300<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Maize<\/td>\n<td width=\"93\">8.0<\/td>\n<td width=\"94\">10.0<\/td>\n<td width=\"94\">400<\/td>\n<td width=\"98\">500<\/td>\n<\/tr>\n<tr>\n<td width=\"115\">Tomato<\/td>\n<td width=\"93\">13.0<\/td>\n<td width=\"94\">16.0<\/td>\n<td width=\"94\">1200<\/td>\n<td width=\"98\">1350<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em>\u00a0<\/em><em>The selling price of wheat is 150\u20ac\/ton, that of maize 150\u20ac\/ton, and that of tomato 185\u20ac\/ton.<\/em><\/p>\n<p><em>The farm area is 50 ha, and the farmer can work 1000 hours in summer and 1000 hours in winter, and has 150 tho<\/em><em>usand <\/em><em>m<\/em><em>3<\/em><em>\u00a0for irrigation<\/em><em>.\u00a0\u00bb<\/em><\/p>\n<p><em>\u00a0<\/em><\/p>\n<p><strong>Answer the following questions :<\/strong><\/p>\n<ul>\n<li><strong>What are the effects observed on constraints and variables ?<\/strong><\/li>\n<li><strong>The new cropping pattern approach is different, why ?<\/strong><\/li>\n<\/ul>\n<p><strong>Then check the solution :\u00a0<a href=\"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence2\/cours1-enrichir-le-modele-de-base\/lecon-12-contrainte-par-periode\/activite-12b-desserrer-la-contrainte-de-travail-dans-un-modele-a-plusieurs-periodes-solution\/\" rel=\"attachment wp-att-961\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/files\/2016\/08\/solution.png\" alt=\"solution\" width=\"92\" height=\"45\" \/><\/a><\/strong><\/p>\n<p style=\"text-align: center\"><strong>ii. Displaying results <img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/files\/2017\/11\/N2.png\" alt=\"\" width=\"25\" height=\"24\" \/><br \/>\n<\/strong><\/p>\n<p><strong>Add a row for the number of paid working hours in winter and summer to the RESULT table in activity 12A.<\/strong><\/p>\n<p><strong>Then check the solution\u00a0<\/strong><strong> : <a href=\"http:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence2\/cours1-enrichir-le-modele-de-base\/lecon-12-contrainte-par-periode\/activite-12b-desserrer-la-contrainte-de-travail-dans-un-modele-a-plusieurs-periodes-solution-1\/\" rel=\"attachment wp-att-961\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"http:\/\/www.supagro.fr\/wordpress\/modeleco\/files\/2016\/08\/solution.png\" alt=\"solution\" width=\"92\" height=\"45\" \/><\/a><\/strong><\/p>\n<p><a href=\"http:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence2\/cours1-enrichir-le-modele-de-base\/\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-4121 alignright\" src=\"http:\/\/www.supagro.fr\/wordpress\/modelecoen\/files\/2018\/11\/backUnit.png\" alt=\"\" width=\"211\" height=\"66\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Length : around 30 minutes i. Loosening the labour constraint \u00a0 The farmer now has the possibility of hiring workers at 10\u20ac per hour. Modify the labour1.gms\u00a0model (which you can call travail2.gms) \u00ab\u00a0A given farm can grow three types of <a class=\"more-link\" href=\"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/auto-formation\/sequence2\/cours1-enrichir-le-modele-de-base\/lecon-12-contrainte-par-periode\/activite-12b-desserrer-la-contrainte-de-travail-dans-un-modele-a-plusieurs-periodes\/\">Continue reading <span class=\"screen-reader-text\">  Activity 12B : \u00ab Wheat\/maize \u00bb model \u2013 i. Loosening the labour constraint in a multi-periodical model ii. Displaying results<\/span><span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":92,"featured_media":0,"parent":1788,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1636","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1636","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=1636"}],"version-history":[{"count":37,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1636\/revisions"}],"predecessor-version":[{"id":5008,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1636\/revisions\/5008"}],"up":[{"embeddable":true,"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/pages\/1788"}],"wp:attachment":[{"href":"https:\/\/www.supagro.fr\/wordpress\/modelecoen\/wp-json\/wp\/v2\/media?parent=1636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}