What species of pines are those? I was a sawmill engineer in my distant younger days in New Zealand . We had the Worlds largest man made Forests with millions of Pinus radiata grown. When harvested at 20-25 years ,the next growth are coming on right behind them because they grow so fast there.
They are white pine (Pinus Strobus). Our first harvest will be at the 25 year mark which is 2029. We will take out one half of the pine trees. Next harvest will be 2054. I will be 104 then. :-) Thanks for watching the video.