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17 Cards in this Set

  • Front
  • Back
If a soil holds 3" of water per foot of soil at permanent wilt point, and 6" per foot at field capacity, what is the MAXIMUM amount of water that could be available to a tree whose root system extends to a depth of 2 feet
6"
Coarse textured soil layered on top of fine textured soil will cause the
water to accumulate in the upper layer, and slowly infiltrate the lower layer.
Iron may be deficient in certain species grown in aldaline soils because
at high pH's the iron is in a form not soluble in water.
The point at which a tree cannot pull any more water from the soil is called the
permanent wilting point
Soils with a high cation exchange capacity tend to be
more fertile.
Roots absorb fertilizers in the form of
ions
Sulfur is applied to soils PRIMARILY to
lower the pH.
Chronic stress could be caused by
inappropriate soil pH.
A soil test may NOT identify a nutrient deficiency problem in a tree because
even if the soil contains nutrients, the plant may not be able to absorb them.
Excessive fertilizer salts in the root zone
may draw water out of the roots.
Evapotranspiration rates are dependent on all of the following EXCEPT
soil pH and phloem transport
A definition of soil pH is the
relative acidity/alkalinity of the soil.
When a clod of clay loam soil that can be molded into a ball and that crumbles when rubbed, the soil's moisture is
about right.
A symbolic relationship between a fungus and roots is called
mychorrhizae
The factor that is MOST responsible for the soil type in a location is the
weathering of the underlying parent material.
The term "soil texture" refers to
the relative proportion of soil particle sizes present.
Under non-saturated conditions, macropores are normally filled with
air.