1000 acres in Oregon. Surplus planes from World War II were initially used for aerial seeding, with the open cockpit Stearman biplane used frequently. Because many veterans were trained to fly these planes, this led the way for many people to develop a business around aerial applications. Today professionals use planes powered by turboprop engines and are navigated by GPS for better accuracy. Use of seed balls In 1987, Lynn Garrison proposed the creation of a Haitian Aerial Reforestation Project (HARP), by which tons of seed would be scattered from specially modified aircraft. The seeds would be encapsulated in an absorbent material. This coating would contain fertilizer, insecticide/animal repellent and, perhaps a few vegetable seeds. Haiti has a bimodal rainy season, with precipitation in spring and fall. The seeds could have been moistened a few days before the drop, to start germination. The project never came to fruition. Seed balls were experimentally used in aerial seeding in Kenya in 2016. This was an attempt to improve the yield of standard aerial seeding. The use of seed balls, instead of simple seeds, to perform aerial reforestation in Kenya seems to have produced desirable results. Seedballs Kenya (a collaboration between Chardust Ltd and Cookwell Jikos) has sold and overseen distribution over 16 million seedballs, as per November 2021. It is likely, though, that the majority of these seed balls are deployed traditionally instead than via aerial seeding and there is no published data to support the benefits of using seed balls via aerial seeding. The most recent attempt at seed bombing was performed by DroneSeed, a company that opened in 2019. They claim to have devised a proprietary seed bomb that is able to deter animals from eating the seeds and, by using a mix of different seeds in the same bomb, to maximize the yield of the tree planting operations. Given the focus of this company on disaster relief, they have considered sapling darts not to be an effective solution since "nursery suppliers lack capacity to reforest after sizeable wildfires — especially repeat fires." Saplings A project in the late 1990s planned to drop saplings instead of seeds. Saplings would be encased in sturdy and biodegradable containers which would work as projectiles and pierce the ground at high velocity. This would likely guarantee a better yield when compared to simple aerial seeding or even seed bombing. This project was being developed