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ISA - Arborist Certification Test - Chapter3
o, a - correct answer The majority of fine, absrobing roots of a tree are in the __ and
__ horizons.
compact, pore space - correct answer Driving vehicles across wet soil will _____ the
soil and destroy soil _____ _____.
Buffering Capacity - correct answer _____ ______ is the soil property that resists
changes to the pH.
True - correct answer True/False - Negatively charged clay particles hold cations near
their surface.
soil structure - correct answer ______ _______ modifies the effects of soil texture as
the soil particles form clumps or aggregates.
acidic, neutral, alkaline - correct answer On the pH scale, less that 7 is ____, 7 is
____ and more that 7 is _____.
100 - correct answer A pH of 5 is ____ times more acidic than a pH of 7
leaching - correct answer the process in which ions of essential element wash down
through the soil profile and are lost is called ______.
cations - correct answer Many essential elements are dissolved in soil water in the
form of positively charged particles called _____.
alkaline - correct answer If the soil is to ______, iron an manganese may be in
chemical from that is unavailable to trees.
rhizosphere - correct answer The ______ is the zone of intense biological activity near
the actively elongating roots.
sand - correct answer coarse-textured soil particles
buffering capacity - correct answer ability to maintain pH
field capacity - correct answer soil after gravitational water has drained
macropores - correct answer tend to be air filled
mycorrhizae - correct answer "fungus roots"
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