4.0 Dr D G Parbery. At least 6 weeks practical farming experience on two or more farms; each period of farmwork should last for at least two weeks. As for 212-313 Vacation Work. As for 212-313 Vacation Work. Reports on at least two periods of work experience which are marked pass or fail only. They must be submitted during second semester. Degrees are not conferred unless this requirement is satisfied.