Question 1
2 out of 2 points
Loam soils are often consider ideal for growing plants because they contain a
balance of sand, silt and clay particles with good drainage and adequate nutrients.
Selected
Answer: Tru
e
Answers: Tru
e
False
Question 2
2 out of 2 points
About 10% of soil consists of pore spaces that are filled with air and/or water.
Selected
Answer: Fals
e
Answers: True
Fals
e
Question 3
2 out of 2 points
Which of the following can be added to alkaline soil to decrease soil pH?
Selected
Answer:
Elemental sulfur
Answers: Dolomite
Elemental sulfur
Lime
Sand
A naturally mined mineral deposit from Chile called
acideite.
Question 4
2 out of 2 points
In general, nutrients are released more quickly and efficiently into the soil from
synthetic fertilizers than organic fertilizers.
Selected
Answer: Tru
e
Answers: Tru
e
False
Question 5
2 out of 2 points
Which of the following is an inorganic fertilizer
Selected
Answer:
Ammonium nitrate
Answers:
Ammonium nitrate
Bone meal
Manure
Fish Emulsion
Question 6
2 out of 2 points
Nitrogen in organic fertilizers is released slowly into the soil because the organic
material has to be...
Selected
Answer:
decomposed by soil microorganisms for it to be available
Answers: mineralized in the presence of water, but since desert soils are dry this
normally fast process is slowed way down.
decomposed by soil microorganisms for it to be available
first agitated by a mechanical disturbance in order to physically
breakdown the large organic fertilizer molecules.
stereoscopically transformed by anerobic bacteria because desert soils
normally have a high or alkaline soil pH.
Question 7
2 out of 2 points
The letters N P and K on fertilizer labels stand for
Selected
Answer:
Nitrogen, Phosphorus and Potassium
Answers: Nutrients, Pathogens and Kryptonite
Nitrogen, Phosphorus and Iron
Nitrogen, Phosphorus and Potassium
None of the above
Question 8
2 out of 2 points
The pH of soil in the Phoenix area is generally
Selected
Answer:
alkaline,
above 7
Answers: acidic, below
7
alkaline,
above 7
Neutral
Question 9
2 out of 2 points
The largest particle size of soil is...
Selected
Answer:
Sand
particle
Answers: Silt particle
Loam parti
cle
Sand
particle
Clay
particle
Question 10
2 out of 2 points
Which of the following soil types needs to be watered least often?
Selected
Answer:
Clay
Answers: Silty
Loa
m
Sand
y
Clay
Question 11
2 out of 2 points
The macronutrient most often lacking in in soil to promote optimum plant growth is
Selected
Answer:
Nitrogen
Answers: Phosphor
us
Nitrogen
Iron
Potassium
Question 12
2 out of 2 points
Micronutrients are those nutrients that plants don't really need to survive.
Selected
Answer: Fals
e
Answers: True
Fals
e
Question 13
2 out of 2 points
In Arizona, which nutrient is deficient (below levels to sustain normal function) within a
plant when the younger leaves are abnormally yellow?
Selected
Answer:
Iron
Answers: Nitrogen
Iron
Unobtainiu
m
