Options for Emergency Wind Control
| Author: |
Anne Verhallen - Soil Management Specialist (Hort.) /OMAFRA
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| Creation Date: |
24 April 2008
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| Last Reviewed: |
24 April 2008
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Spring has sprung and soils are drying rapidly. Historically we usually
see the highest, sustained wind speeds in the first few weeks of May.
Gusty winds during a storm or just high winds can move soil. If the soil
is dry, loose and bare there is a good chance that some of it is on the
move and with it your valuable soil fertility! Control erosion early to
prevent crop damage and further soil blowing. Watch areas like sandy knolls,
headlands, roadways and other traffic areas for the early signs of soil
movement.
Ideally there should be a program of cover crops or grass windstrips,
tree windbreaks etc. in place for wind control, but unplanned changes
in land and rotations can throw you some surprises. Oat or barley interseeds
are possible, particularly on muck soils but if you want to create wind
strips from oats or barley it is too late for the early May planted crops.
Spring cereal wind strips may still have a place for late May and June
planted crops.
Here are some options to consider:
| Wind Control Option |
What is it doing |
Where it shines |
Limitations or problems |
| Create wind barriers from snow fence, bales of straw, strips of
wood etc |
Slows wind speed across the field
Can create microclimate effects - temperature +1-2 F, advanced crop
maturity
|
Large open fields with erosion prone knolls
Crops with harvest alleys
|
Cost and sourcing the materials
Cost of set up and removal (think soggy, half rotted straw bales)
usually spaced too far apart for good wind abatement
|
| Spreading residue like straw, corn cobs on fields that are bare
of residue |
Roughens the field surface
Protects from scouring action
|
Erosion prone knolls |
Getting the materials and anchoring it (larger particles stay in
place better)
Possible harvest concerns
|
| Tillage |
Roughens the field surface to reduce wind strength
May bring moisture to the top
|
Short term blow with very moist soils |
Destroying soil structure that is there
Dries the soil and breaks up aggregates - for a longer wind event,
this will cause more erosion
|
| Seeding or interseeding a cover crop |
Roughens the field surface
Helps to hold soil particles and protect from scouring
|
Headlands and harvest alleys
Interseeding in the crop
|
Height of cover crop for protection
removing interseeding in crop
Moisture competition with crop
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For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
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