Yes, students entering their first semester in the fall will only be taking four courses!
For the B.Sc.(Agr.) degree program students are required to take a course worth 1.00 credits (AGR 1110). This course, in addition to the other three courses each worth 0.50 credits, will give you a total of 2.50 credits which gives you full-time registration.
This also means you cannot select an elective course for the fall semester.