western-queensland-gardening-guide.pdf - South West NRM

Look for:
soil erosion problems that could affect your methods of weed control
particular weeds that should be removed before planting; for example, twining
legumes
tall or rank vegetation that would constitute a fire hazard and make the area
difficult to work
Consider also whether your method of preparing the site could itself cause a weed
problem; for example, by encouraging regrowth from cleared wattle trees. It is
always a good idea to clean up the site before you plant. Methods include
cultivating, slashing, burning, and treating with herbicides.
2. Create a tree zone
The weed-free tree-planting zone can be either a ring or a band. Each zone should be
from 1 m to 2 m wide, increasing to 2 m as they grow (See Figure 13).
terrow
tree zone
Figure 13. A model tree zone
The zone can be created by cultivating the ground, or by applying herbicides. In
many cases, a combination of both works best. Burning off or mowing are not
effective, since the weeds must be killed.
In general, herbicides such as glyphosate are effective, but some weed proble
might require specific herbicides. (Always seek professional advice and follow the
directions on the label.) Treat the area as close to planting time as possible, preferably
when the weeds are short and vigorous. Wait for the zone to be clearly visible before
planting.
3. Maintain the zone
Until the trees have become well established, maintain a consistently high level of
weed control in the zone. The following methods are effective:
e Hand weeding: Either pull out the weeds or chip them out, taking care not to
damage the trees roots. Note, however, that where large areas are involved, this is
a slow and tedious process.