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Ebusinger1298
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The best way to prevent erosion is to remove
the minimum amount of ______ and re-establish it as soon as possible.
Vegetation
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A critical area is ______ to stabilize with vegetation. Whenever possible, critical areas should not be ______.
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A non-critical area is an area on which vegetation can be established without ______.
Difficulty
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Sensitive areas are those areas next to ______, ______, ______, ______ ______, or other landscape features that are vulnerable to damage by sediment.
- Lakes
- streams
- wetlands
- adjacent properties
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Permanent vegetative stabilization is required when it is necessary to stabilize an area for more than ______.
One year
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Legumes furnish ______ to the soil, an important plant nutrient.
Nitrogen
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When assessing a site prior to selecting plant materials, consideration should be given to:
- climate
- soil
- slopes
- site use and maintenance
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Consideration should be given to on-site soil conditions such as:
- Fertility
- acidity
- soil moisture content
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A 50 pound bag of 20-10-5 contains ______ pounds of phosphorus.
Five
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Topsoil should be ______ at the beginning of grading operations for later use.
Saved
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When slopes are steeper than ______:______ (horizontal/vertical), structures may be more effective to control erosion than vegetation.
2:1
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It is necessary to add ______ to lower acidity (increase the pH).
Lime
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Soil pH should be no lower than ______ for most grasses and no lower than ______ for legumes.
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The amount of lime and/or fertilizer required for good vegetative growth can be determined through ______ ______.
Soil testing
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Three factors that contribute to soil slippage are:
a.) high ______ ______
b.) slope ______
c.) poor ______
- Moisture content
- steepness
- bonding
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Droughty soil can be corrected by:
a.) selecting ______ resistant plants
b.) ______ silt and clay soil or ______ matter with the droughty soil
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The problem of wet soil can be handled by:
a.) selecting plants ______ to wet conditions
b.) installing artificial ______ or subsurface ______
- tolerant
- surface, drainage
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Four methods for establishing vegetation are:
a.) ______
b.) ______
c.) ______
d.) ______
- Seeding
- sprigging
- sodding
- planting a shrub or tree, live staking or fascines, mulching without seeding
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Sprigging involves planting ______ plants in the treated area.
Sprouted
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Sod must be closely ______ together and ______ in place on steep slopes or in areas of concentrated flow.
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Immediately following seeding, a mulch of ______ ______ should be applied at ______ tons/acre.
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______ insulates the soil from intense heat and cold, and conserves ______.
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On steep slopes or areas of concentrated flow, ______ or ______ may be required to properly secure the seeding.
- Mulch blankets
- turf reinforcement mats
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The two types of maintenance required for vegetation stabilization are:
______ and ______
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Areas planted in the fall should be inspected in the ______.
Spring
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