A number of Mangalitsa producers are interested in harvesting acorns and feeding them to their Mangalitsa pigs.
Something similar happens in Eurasia - people harvest acorns in Turkey and bring them to Spain, where they are fed to Iberico pigs to produce special pork which is eventually made into cured products.
Pecan harvesting equipment and methods might be useful in picking up acorns. Here's something on how to harvest pecans. Here's used pecan equipment.