Assuming you will follow the normal schedule and do not have any study delay, the first moment to choose your own courses is in your third year. During your first and second year you follow compulsory courses to obtain 120 ECTS in total. In your third year, you have to follow the compulsory course case studies (6 ECTS) and you will do your BSc thesis (24 ECTS). The rest of this year is your minor, in which you can choose your courses. Normally it is 30 ECTS. You can do your minor at the WUR, but also abroad or at another university in the Netherlands.