It is called "Sprouting" or "Seedling" of the seed from a Pine Cone, and the Spouted Seed does not necessarily have to derive from the tree, to which it is next to. You see, in-side the pine cone each layer has a seed behind it and each seed has a "SINGLE-WING" that is sort of shaped like a propeller. When the Cone gets dry in late August or Early September (in South Georgia at least) the Cones begins opening up and the dry winds will blow the seeds from 20 yards to up to 2-3 miles away from its "Mother Tree". This prevents the Trees from in-breeding believe it or not. So very rarely is a SPROUT related to the Pine Tree, to which it is next to.
Pine Seedlings are raised in Beds, similar to Tomato and Pepper Plants, and in the same vain Transplanted in a like fashion, but four to 6 feet apart vice 6 to 12 inches apart. Oak Trees are normally planted 8 to 12 feet (Groves) and thinned out as they mature.
AS a young Teen Ager I worked with a friend in the US Forestry Service in Gathering Pine Seeds for planting in what we called Tobacco beds (same seedling planting process for us Farm Boys!) Crawled all over Pine Trees (way up there and very carefully pulled Pine Cones off right before Opening Time, we then carefully removed the seeds a few days later when the cones opened up.
Hope this helps you all to understand Pine Trees a little better. The Pine Tree is Farmed in Georgia and is one of our Major Crops and Naval Store Producers, which is in Valdosta, GA.