Airal planting : method of planting seeds or seedlings whereby planting containers containing the seedlings are dropped from an aircraft. The planting container has fins for aerodynamic stability, a pointed nose for penetrating the soil and wall portions penetratable by the roots of the seedlings . airal crop dusting : Crop dusting with insecticides start in 1920s in the United States by converting military air crafts for that purpose . in the 1940s built agricultural fixed wing aircraft became common. i think using helicopter is better becouse you dont need run way . so you will keep to your self may be one hectar of land
science of farm machinery