ALABAMA CERTIFIED CROP ADVISER NEWEST
UPDATED 2026-2027 ACTUAL FINAL EXAM WITH
MOST TESTED 100 PRACTICE QUESTIONS AND 100%
CORRECT VERIFIED ANSWERS WITH DETAILED
RATIONALES PLUS CERTIFIED ANSWER KEY
GRADED A+ INSTANT DOWNLOAD PDF
1. A soil test report recommends applying 60 pounds of phosphate (P2O5) per acre
to a corn field. The recommended fertilizer is DAP (18-46-0). How many pounds of
DAP per acre are needed to meet the phosphate recommendation?
A) 87 lbs/acre
B) 130 lbs/acre
C) 150 lbs/acre
D) 174 lbs/acre
Correct Answer: B
Rationale: DAP (18-46-0) contains 46% phosphate. To calculate the amount
needed: 60 lbs P2O5 ÷ 0.46 = 130.4 lbs DAP per acre.
,2. A farmer notices yellowing of leaves between the veins (interveinal chlorosis) on
young corn leaves. This symptom is most likely indicative of a deficiency of which
nutrient?
A) Nitrogen
B) Phosphorus
C) Potassium
D) Zinc
Correct Answer: D
Rationale: Zinc deficiency in corn is characterized by interveinal chlorosis on young
leaves, often starting at the base of the leaf and progressing upward. Nitrogen
deficiency is more general chlorosis, and potassium deficiency shows as yellowing
and necrosis at leaf margins.
3. Which of the following soil properties is most influenced by the addition of
organic matter?
A) Soil pH
B) Cation exchange capacity (CEC)
C) Bulk density
D) Electrical conductivity
Correct Answer: B
Rationale: Organic matter is a primary source of negative charges in the soil,
contributing significantly to cation exchange capacity (CEC). Sand and silt particles
contribute little to CEC.
4. A soil test shows a pH of 5.2. The crop being planted is alfalfa, which requires a
pH of 6.5-7.0. How much agricultural lime (calcium carbonate equivalent 90%) is
needed to raise the pH to 6.5 if the soil test recommends 2 tons of pure calcium
carbonate per acre?
A) 1.8 tons/acre
B) 2.0 tons/acre
,C) 2.2 tons/acre
D) 2.4 tons/acre
Correct Answer: C
Rationale: To account for the lower calcium carbonate equivalence (CCE) of the
lime, divide the recommendation by the CCE: 2.0 tons ÷ 0.90 = 2.22 tons/acre.
5. In a corn-soybean rotation, a farmer applies nitrogen fertilizer to corn. The best
method to reduce nitrogen leaching into groundwater is:
A) Apply all nitrogen in the fall
B) Use split applications of nitrogen throughout the growing season
C) Apply nitrogen when the soil is saturated
D) Use a single high-rate application at planting
Correct Answer: B
Rationale: Split applications (side-dressing) of nitrogen synchronize nitrogen
availability with crop uptake, reducing the amount of nitrate available for leaching
during periods of excess rainfall.
6. Which of the following is the most common herbicide-resistant weed species in
Alabama row-crop production?
A) Palmer amaranth (pigweed)
B) Common ragweed
C) Johnsongrass
D) Nutsedge
Correct Answer: A
Rationale: Palmer amaranth (Amaranthus palmeri) is a highly competitive and
prolific weed that has developed resistance to multiple herbicide groups (Group 2,
5, and 9, including glyphosate) across much of the southeastern United States,
including Alabama.
, 7. The ideal time to take a soil sample for a "no-till" corn field is:
A) Immediately after harvest
B) In the spring just before planting
C) At the same time every year
D) After a heavy rain
Correct Answer: C
Rationale: Soil sampling should be done at approximately the same time each year
to minimize seasonal variability. Fall is often recommended after harvest and
before fall fertilization.
8. A cotton field is showing symptoms of potassium deficiency, including yellowing
and necrosis along the leaf margins. Which of the following is the most common
cause of this deficiency in Alabama?
A) Low soil pH
B) Drought stress and low soil potassium availability
C) High soil phosphorus levels
D) Soil compaction
Correct Answer: B
Rationale: Potassium deficiency in Alabama cotton is often exacerbated by drought
stress, which reduces potassium uptake through the roots. Low soil potassium
levels and high soil pH can also contribute.
9. What is the recommended planting depth for corn in Alabama's silt loam soils?
A) 0.5 to 1.0 inch
B) 1.5 to 2.0 inches
C) 2.5 to 3.0 inches
D) 3.5 to 4.0 inches
Correct Answer: B
Rationale: Corn should be planted 1.5 to 2.0 inches deep in silt loam soils. Shallow
UPDATED 2026-2027 ACTUAL FINAL EXAM WITH
MOST TESTED 100 PRACTICE QUESTIONS AND 100%
CORRECT VERIFIED ANSWERS WITH DETAILED
RATIONALES PLUS CERTIFIED ANSWER KEY
GRADED A+ INSTANT DOWNLOAD PDF
1. A soil test report recommends applying 60 pounds of phosphate (P2O5) per acre
to a corn field. The recommended fertilizer is DAP (18-46-0). How many pounds of
DAP per acre are needed to meet the phosphate recommendation?
A) 87 lbs/acre
B) 130 lbs/acre
C) 150 lbs/acre
D) 174 lbs/acre
Correct Answer: B
Rationale: DAP (18-46-0) contains 46% phosphate. To calculate the amount
needed: 60 lbs P2O5 ÷ 0.46 = 130.4 lbs DAP per acre.
,2. A farmer notices yellowing of leaves between the veins (interveinal chlorosis) on
young corn leaves. This symptom is most likely indicative of a deficiency of which
nutrient?
A) Nitrogen
B) Phosphorus
C) Potassium
D) Zinc
Correct Answer: D
Rationale: Zinc deficiency in corn is characterized by interveinal chlorosis on young
leaves, often starting at the base of the leaf and progressing upward. Nitrogen
deficiency is more general chlorosis, and potassium deficiency shows as yellowing
and necrosis at leaf margins.
3. Which of the following soil properties is most influenced by the addition of
organic matter?
A) Soil pH
B) Cation exchange capacity (CEC)
C) Bulk density
D) Electrical conductivity
Correct Answer: B
Rationale: Organic matter is a primary source of negative charges in the soil,
contributing significantly to cation exchange capacity (CEC). Sand and silt particles
contribute little to CEC.
4. A soil test shows a pH of 5.2. The crop being planted is alfalfa, which requires a
pH of 6.5-7.0. How much agricultural lime (calcium carbonate equivalent 90%) is
needed to raise the pH to 6.5 if the soil test recommends 2 tons of pure calcium
carbonate per acre?
A) 1.8 tons/acre
B) 2.0 tons/acre
,C) 2.2 tons/acre
D) 2.4 tons/acre
Correct Answer: C
Rationale: To account for the lower calcium carbonate equivalence (CCE) of the
lime, divide the recommendation by the CCE: 2.0 tons ÷ 0.90 = 2.22 tons/acre.
5. In a corn-soybean rotation, a farmer applies nitrogen fertilizer to corn. The best
method to reduce nitrogen leaching into groundwater is:
A) Apply all nitrogen in the fall
B) Use split applications of nitrogen throughout the growing season
C) Apply nitrogen when the soil is saturated
D) Use a single high-rate application at planting
Correct Answer: B
Rationale: Split applications (side-dressing) of nitrogen synchronize nitrogen
availability with crop uptake, reducing the amount of nitrate available for leaching
during periods of excess rainfall.
6. Which of the following is the most common herbicide-resistant weed species in
Alabama row-crop production?
A) Palmer amaranth (pigweed)
B) Common ragweed
C) Johnsongrass
D) Nutsedge
Correct Answer: A
Rationale: Palmer amaranth (Amaranthus palmeri) is a highly competitive and
prolific weed that has developed resistance to multiple herbicide groups (Group 2,
5, and 9, including glyphosate) across much of the southeastern United States,
including Alabama.
, 7. The ideal time to take a soil sample for a "no-till" corn field is:
A) Immediately after harvest
B) In the spring just before planting
C) At the same time every year
D) After a heavy rain
Correct Answer: C
Rationale: Soil sampling should be done at approximately the same time each year
to minimize seasonal variability. Fall is often recommended after harvest and
before fall fertilization.
8. A cotton field is showing symptoms of potassium deficiency, including yellowing
and necrosis along the leaf margins. Which of the following is the most common
cause of this deficiency in Alabama?
A) Low soil pH
B) Drought stress and low soil potassium availability
C) High soil phosphorus levels
D) Soil compaction
Correct Answer: B
Rationale: Potassium deficiency in Alabama cotton is often exacerbated by drought
stress, which reduces potassium uptake through the roots. Low soil potassium
levels and high soil pH can also contribute.
9. What is the recommended planting depth for corn in Alabama's silt loam soils?
A) 0.5 to 1.0 inch
B) 1.5 to 2.0 inches
C) 2.5 to 3.0 inches
D) 3.5 to 4.0 inches
Correct Answer: B
Rationale: Corn should be planted 1.5 to 2.0 inches deep in silt loam soils. Shallow
