Garden with Insight v1.0 Help: per unit

Sometimes a variable will describe the amount of something "per unit" of some other thing, such as "Photosynthate per unit of radiation." This simply means the amount of the first variable divided by the amount of the second variable thus:

10 lbs per 2 days = 5 lbs per 1 day = 5 lbs per unit of time (the unit of time being days).