Alan M

Hi I've just planted 2000 broadleaf trees with tubes and stakes over 2 hectares of rank pasture. I'd like to keep the competitive grass down for the first few years if possible. It would be good to have, say, a 30cm radius of clear ground around each one using roundup or similar. Has anyone used a knapsack sprayer on this scale? If so, can you give a view on the amount of time needed to individually treat 2000 trees. They are randomly scattered so there is no way of using a machine/tractor sprayer. Many thanks Alan