Water Management Flashcards
If a planting hole in a clay soil site is backfilled with sandy soil, nutrients will be more available to the newly established roots within the planting hole.
drainage will be improved, helping the tree to establish.
water will drain very slowly out of the planting hole.
the improved texture of the backfill will reduce the chances of girdling roots forming later.
water will drain very slowly out of the planting hole.
A soil is at field capacity when:
There is no water available to the roots.
The permanent wilting point has been reached.
It is completely Saturated.
The gravitational water has drained away
None of these
The gravitational water has drained away
True or False
Soil can hold water so tightly in micropores that the ability of tree roots to absorb the water is restricted.
True
The ____________________ is the rate at which water soaks into the soil.
Irrigation Rate
Percolation Rate
Infiltration Rate
Drainage Rate
None of these
Infiltration Rate
In sites where poor drainage can be a problem, which of the following will not help ensure plant survival?
installation of drain tiles.
careful plant selection and shallow planting.
improvement of surface drainage by changing the grade, or trenching.
placing gravel in the bottom of the planting hole and backfilling with sandy soil.
placing gravel in the bottom of the planting hole and backfilling with sandy soil.
When soil is compacted:
Micropores combine to form macropores.
A high water content will reduce the damaging effects.
Soil aggregates are broken up, giving the soil a finer texture.
Total pore space and the percentage of macropores are reduced.
Total pore space and the percentage of macropores are reduced.
_________________________ are materials sprayed on plants to reduce water loss through transpiration.
Horticultural Oils
Surfactants
Antitranspirants
Foliar fertilizers
Antitranspirants
Sandy soils:
do not ever reach field capacity because drainage is good.
all of these
have higher infiltration rates than clay soils.
have a greater water-holding capacity than clay soils
have higher infiltration rates than clay soils
A measure of the rate of water use by plants and evaporation from soil is known as ____________________________.
Evapotranspiration
Transpiration
Percolation
Evaporation
Evapotranspiration
An instrument that is installed in the ground, generally for a year or two, to monitor soil moisture below the surface is a ___________________________.
soil probe
thermometer
hygrometer
tensiometer
tensiometer
True or False
In most instances, it is preferable to minimize water irrigation directly to the foliage of plants.
True
