I'm not sure I could identify a pecan unless it's sitting atop a pie....not very common up here. Were there any other specimens growing on the trees where you found this one? The cavity in the hull section on the right has the appearance of what I imagine a pecan would look like.... confused

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.