Exam (elaborations)
2024 Agronomy Test (1).
- Course
- GPSTC Class 290
- Institution
- GPSTC Class 290
2024 Agronomy Test (1).
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At what stage does the growing point first come above ground in corn?A. V1
B. V3
C. V6
D. V12 - CORRECT ANSWER-C. V6
When staging corn a leaf (or node) is counted when what is visible
A. collar
B. leaf
C. sheath
D. blade - CORRECT ANSWER-A. collar
The first root coming from the seed is called the
A. crown root
B. radical
C. seminal root
D. coleoptiles - CORRECT ANSWER-B. radical
The structure that elongates to cause emergence in corn is the
A. coleoptiles
B. mesocotyl
C. radical
D. plumule - CORRECT ANSWER-B. mesocotyl
One major reason to stage corn plants is to know when to apply
A. herbicides
B. insecticides
C. dry fertilizer
D. all of these - CORRECT ANSWER-A. herbicides
If a producer's corn was damaged by hail ( was cut off at ground level ) at V8, the
producer should
A. do nothing, it will grow back
B. consider replanting if early enough in the season because there will be no
regrowth
C. chop the corn for silage
, D. plant a longer season variety - CORRECT ANSWER-B. consider replanting if
early enough in the season because there will be no regrowth
Which fertilizer nutrient is normally applied in the highest amount of actual nutrient
A. nitrogen
B. potassium
C. phosphorus
D. sulfur - CORRECT ANSWER-A. nitrogen
If producers have a low pH in their soil they should apply
A. gypsum
B. lime
C. sulfur
D. iron - CORRECT ANSWER-B. lime
According to the ISU publication Regional Nitrogen Guidelines for Corn, the corn
yield goal should be multiplied by what number to determine the amount of nitrogen
to be applied.
A. 0.8
B 1.2
C. 1.4
D. 2.0 - CORRECT ANSWER-B. 1.2
Which of the following is/are common forms of nitrogen fertilizer
A. anhydrous ammonia
B. liquid
C. urea
D. all of these - CORRECT ANSWER-D. all of these
Nitrogen can "leach" from the soil. This means it can
A. evaporate into the air
B. move down through the soil and into the ground water
C. run off the soil surface
D. all of these - CORRECT ANSWER-B. move down through the soil and into the
ground water
At harvest maturity, most nitrogen would be found in the
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