(U.S. Forest Service) At normal altitudes and flying speeds the distributors on fixed-wing aircraft throw seed over a ... The power slingers attached to helicopters throw seed over a swath about 30 m wide. ... measuring the seed distribution on the site is worked out in advance and, if possible, flagmen are positioned to guideanbsp;...
|Title||:||Sowing Forests from the Air|
|Publisher||:||National Academies - 1981|