"george" wrote:
http://www.stuff.co.nz/stuff/0,2106,3567413a10,00.html

Pretty crowded skies: no less than four aircraft involved. First a near
miss with a helicopter, then a collision of the two planes at 450 meter
altitude, and the wreckage raining down in front of a "top-dressing plane
[flying] just metres above the ground."

What's a "top-dressing plane?"