Questions and CORRECT Answers
What percentage of the food we eat directly or indirectly comes from the soil? - CORRECT
ANSWER - 95%
Which is NOT true about soil?
Soil is the skin of the earth
air, water, organic matter, and mineral are components of soil
soil is a heterogenous natural body
soil is not a pedosphere - CORRECT ANSWER - soil is not a pedosphere
a soil is:
a plant
biologically alive
a rock
biologically and chemically inert - CORRECT ANSWER - biologically alive
plants get most of their soil nutrient dissolved in soil water, thus they are on a liquid diet T/F -
CORRECT ANSWER - true
the three fundamental natural reactions include photosynthesis, cellular respiration, and: -
CORRECT ANSWER - cation exchange capacity
the average soil organic matter as a soil component is about _____% by volume - CORRECT
ANSWER -5
, the three micronutrients that are mainly taken as anions by plants are - CORRECT
ANSWER - B, Cl, Mo
many trees have been through high winds, floods, and hurricanes without falling for many years
because soil provides sufficient: - CORRECT ANSWER - support
physical weathering processes result in: - CORRECT ANSWER - the disintegration of
rocks to smaller components
a soil profile consists of the following horizons: Oe, Oa, Ap, E, EB, BE, Bt1, Bt2, BC, CB, C.
How many master horizons does the soil contain? - CORRECT ANSWER - five
a soil profile consists of the following horizons: Oe, Oa, Ap, E, EB, BE, Bt1, Bt2, BC, CB, C.
How many transitional horizons does this soil contain? - CORRECT ANSWER - three
the reaction: mica + H2O ---> mica.H2O illustrates - CORRECT ANSWER - hydration
the soil regolith of southeast US, FL, lower parts of AL, GA, SC, and NC are dominated by -
CORRECT ANSWER - coastal plain
the Nile, the longest river in the world, carries billions of parent materials from the high lands of
Ethiopia and deposits them in Egyptian plains (inland) every year. These water transported and
deposited parent materials are known as: - CORRECT ANSWER - delta
residual parent materials are best describes as: - CORRECT ANSWER - materials formed
by weathering of rocks and minerals in place
the five soil forming factors include: - CORRECT ANSWER - parent material, biota,
topography, climate, time