|
A
weed is any plant growing where it is not
wanted.
Are
all weeds considered to be problem plants? Can you
think of examples where the presence of weeds could
be beneficial? harmful?
Benefits
of Weeds Plant/Crop Example
- Contribute
to a good soil structure Avoid compaction of
tilled soils & decomposition increases
organic matter
- Reduce
soil erosion Mow weeds under trees ( in
orchards, etc.)
- Serve
as hosts for beneficial insects, etc. All crops
have examples
- Create
a windbreak All crops have
examples
- Improve
the diversity of a planting / ecosystem All
crops have examples
- Other
benefits ?
Disadvantages
of Weeds Plant/Crop Example
- Compete
for sunlight, soil moisture, & soil
nutrients All crops have
examples
- Serve
as hosts for economic pests All crops have
examples
- Increase
humidity (may increase disease pests) All crops
have examples
- Decrease
aesthetic value All ornamental crops have
examples
- Other
harmful aspects?
|
