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21 Cards in this Set
- Front
- Back
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True |
True/False - Infrequent, deep soakings of trees & shrubs are preferable to frequent shallow waterings. |
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Late Night or Early Morning |
The most beneficial times to irrigate plants are _______ _______ or ______ ______.
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Infiltration |
The _______ rate is the rate at which water soaks into the soil.
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Water-Holding Capacity |
Clay soils generally have a greater _______ - _______ _______ than sandy soils, but water percolates through clay soils more slowly.
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Compaction |
Disadvantages to sprinkler irrigation are high application rate & surface _______ created by the water hitting the soil surface.
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True |
True/False - In most instances, it is preferable to minimize water irrigation directly to the foliage of plants.
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Reduces Water Waste Reduces Surface Compaction |
What are two advantages of drip irrigation? |
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Must Be Moved Outward As Root System Expands May Become Clogged |
What are two disadvantages of drip irrigation?
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Minimum Irrigation |
_______ _______ is designed to maintain plants during periods of reduced rainfall, supplying only enough water to maintain a desired plant quality.
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Evapotranspiration |
A measure of the rate of water use by plants & evaporation from soil is known as _______.
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1.) Moderate Temperature Extremes 2.) Reduce Competition from Weeds/Grasses 3.) Keeps Mowers Away 4.) Aesthetically Pleasing 5.) Maintain Soil Moisture |
Name the five benefits of mulches around trees.
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Rain Garden |
A _______ is a landscape feature specifically designed to collect & hold stormwater runoff.
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Antitranspirants |
_______ are materials sprayed on plants to reduce water loss through transpiration. |
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Tensiometers |
Soil probes, _______ & electronic moisture sensors are used to monitor soil wetness or dryness.
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True |
True/False - Drought problems can be especially severe following periods of moderate to high soil moisture conditions.
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Root Suffocation/Death Soil Organisms Killed Predisposition to Other Stress Factors Root Collar Rot Tree Prone to Toppling Mineral Toxicities |
Name three tree health problems associated with flooding.
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A |
When irrigating trees:
a.) infrequent, deep soakings are preferable to frequent, shallow waterings b.) the most beneficial & efficient time to water is mid-afternoon at peak sunlight c.) the foliage should be kept wet at night to reduce transpiration d.) keeping the soil moist at the root flare reduces girdling root formation |
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B |
Sandy soils:
a.) have a greater water-holding capacity than clay soils b.) have higher infiltration rates than clay soils c.) do not ever reach field capacity because drainage is good d.) all of the above |
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C |
A soil is at field capacity when:
a.) it is completely saturated b.) the permanent wilting point has been reached c.) gravitational water has drained away d.) there is no water available to the roots |
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D |
With sprinkler irrigation:
a.) less frequent waterings of longer duration will reduce the likelihood of salt build-up b.) water hitting the soil surface can lead to crusting c.) application rates that exceed absorption can lead to runoff d.) all of the above |
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D |
In sites where poor drainage can be a problem, which of the following will NOT help ensure plant survival? a.) careful plant selection & shallow plantings b.) improvement of surface drainage by changing the grade, or trenching c.) installation of drain tiles d.) placing gravel in the bottom of the planting hole & backfilling with sandy soil |
