exactly guys, right on the spot.
In a nutshell, poult recruitment is the number of poults observed per hen in late summer. The reason recruitment numbers are calculated in late summer is because poults surviving to that age have become virtually predator proof and extremely likely to make it to adult (and reproductive) status.
It takes about 2.2 poults per hen in late August/ early September for the population to remain stable (neither increasing or decreasing) assuming normal hunting mortality. More than that, and the population is increasing in that area. Less than that and the population is declining. Back in the heyday of turkeys in my area, we were running 4-5 poults per hen for 2 or 3 consecutive years, and you couldn't walk 200 yards without striking a gobble in the spring.