Only 2 inch without holes on the upper part its too little for such long and narrow pots like mein are.Also my pots are also verry resistant,one single pot weights 15-16 kilos.
For planting to the ground i will open the pot by cutting it. The idea its to have a strong and long tap root for pecans that will go deep when transplanted to the soil ,where its always wet.Air prunning roots for pecans its an idea older than the modern airpots with hooles to the sides and such pecan pots only used to have no base where the tap root got air prunned(no holes to the sides).
Ive used sewage pipes as airpots,they are shown in the pics in the end of the pecan collection.
For me it was a bad idea because i couldnt water in the winter,they got dry and most of them died.I hope i can salvage a few that if they do survive,should be really drought tolerant and even cold hardy as they got minus 15C(0 F) and frozen solid.