Field Science

Requirements:

Harvest 15 Grapefruit Trees
Experiment on 12 Theories
Upgrade the Science Fair Tent

Rewards:

3 Cattle Power, Electrical Experiment, Caretaker Boost

Comes from:

Science Lesson

Spawns:

Doctoral Disagreement

Notes: Grapefruit Trees are a mission reward, you may have some in your Orchard. Building details are HERE.