What is the purpose of the fence? When I ran a farm and based on my days at OSU Ag School for field fence we would use concrete at gates but gravel or soil tamp for lines. Corners were concrete or gravel. For cattle chute concrete mostly but these were 6x6 or 8s as opposed to basic 4x4. If not for livestock but more decorative then gravel at end/corner/gate and tamp remainder. Then if solid the rules are different based on winds. I am talking about basic 3 or 4 rail fencing.