Can basal area exceed the area of the plot?

Question

For example, can you have a basal area of 47 square meters in a 25 meter plot?

Answer 1

Basal area is a measurement taken at a person's breast height (1 - 1.5 metres) above the ground and includes the entire diameter of every tree, including the bark.

I would say yes since you're measuring sq meters against meters.  Height and surface area instead of only surface area.