How much land is needed in all directions from a breeding yard to control the drone pool for mating? If I have a mating yard at point A; and I have drone mother yards 1 to 2 miles awhile, north, south, east, and west of the mating yard, do I control enough territory to increase my chances of the queens mating with my target drone population. Are the drone mother colonies to close or too far from the mating yard? Drone mother yards each contain about 16 colonies. I now control such an area. There are no commercial yards within 10 miles, and no known hobby beekeepers in this area. I am trying to control the area to retain VSH charicteristics in my operation. Input?