Fall 2002: Do
You Know This About Magnesium? |
1. In plant nutrition,
magnesium (Mg) is a(n) _____.
A.
Macronutrient
B.
Micronutrient
C.
Nanonutrient |
2. Let's see who
the plant chemistry pro is? Each molecule of chlorophyll
contains ______ Mg.
A.
0.5%
B.
2.3 %
C.
6.7% |
3. Which nutrient
is dependent on Mg for uptake in plants?
A.
Arsenic
B.
Phosphorous
C.
Einsteinium |
4. Mg plays a role
in which of the following plant metabolic functions?
A.
Enzyme activation
B.
Protein synthesis
C.
Cell division
D.
All of the above |
5. You've just gotten
back your soil test report. Soil Mg levels are below 35
lb/acre. Did your soil make the grade or fail miserably?
A.
A+
B.
C-
C.
F |
6. The Earth's crust
contains roughly _____ Mg.
A.
2%
B.
73%
C.
87% |
7. Below a soil pH
of _____, Mg can become a limiting factor in plant growth.
A.
2.0
B.
4.2
C.
5.8 |
8. Adding high Ca
limestone to soil can _____ Mg deficiencies.
A.
Postpone
B.
Promote |
9. Take a walk on
the wild side! Which of these describes serpentine soils?
A.
Home to Puff the Magic Dragon
B.
A good refuge for reptiles
C.
Supplied with excessive amounts of Mg |
10. For soils with
a good soil nutrient exchange, a desirable ratio of soil
Ca to Mg is about _____.
A.
1000 to 1
B.
1,000,000,000 to 1
C.
10 to 1 |
11. The primary losses
of soil Mg and Ca are by:
A.
Leaching
B.
Erosion
C.
Plant removal |
12. Where are Mg
deficiencies most likely to occur first?
A.
In new leaf growth
B.
In old leaf growth
C.
In seed |
13. Excessive applications
of which nutrients can induce Mg deficiencies?
A.
Calcium
B.
Potassium
C.
Ammonium
D.
All of the above |
14. Which region
would be most susceptible to losses of Mg, Ca, and K?
A.
Regions of high precipitation, such as Washington
B.
Dry, desert country, such as New Mexico
C.
Permafrost soils of Alaska |
15. Which of these
is NOT a symptom of Mg deficiency?
A.
Loss of color between leaf veins
B.
Thin, brittle leaves that curve upward
C.
Reddish-purple tips and edges of leaves
D.
Blue and yellow fuzz on leaves
|
