CCA (CERTIFIED CROP ADVISOR) EXAM AND
PRACTICE EXAM NEWEST 2026 TEST BANK| CERTIFIED
CROP ADVISOR EXAM PREP WITH COMPLETE 650
REAL EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (BRAND NEW!!)
1. A fertilizer with an analysis of 0-46-0 would be considered:
A. Urea
B. Triple superphosphate
C. Muriate of potash
D. Ammonium nitrate
Correct Answer: B
Rationale: A 0-46-0 analysis indicates 0% nitrogen, 46%
phosphate (P₂O₅), and 0% potash. This is triple superphosphate
(TSP), a concentrated phosphorus fertilizer. Urea is 46-0-0,
muriate of potash is 0-0-60, and ammonium nitrate is 34-0-0.
2. A soil has poor phosphorus availability. How will this
affect the observed response to added nitrogen fertilizers?
A. Nitrogen response will be enhanced by the low P
B. Nitrogen response will be limited by the inadequate P supplies
1
,C. There will be no effect on nitrogen response
D. Nitrogen will become toxic to plants
Correct Answer: B
Rationale: Liebig's law of the minimum states that crop growth is
limited by the scarcest nutrient. If phosphorus is deficient, plants
cannot utilize added nitrogen effectively because they lack the
energy (ATP) and root development needed to take up and
assimilate nitrogen.
3. Alfalfa plants with white flecks near the edges of their
leaflets are most likely deficient in which nutrient?
A. Nitrogen
B. Phosphorus
C. Potassium
D. Sulfur
Correct Answer: C
Rationale: Potassium deficiency in alfalfa appears as white or
yellow spots along leaflet margins, a condition called "white
fleck." As deficiency progresses, margins scorch and leaves curl.
Potassium is critical for protein synthesis, water regulation, and
enzyme activation in alfalfa.
2
,4. Aluminum toxicity is most likely to be a problem when:
A. Soil pH is very high (alkaline)
B. Soil pH is very low (acidic)
C. Organic matter content is high
D. Soil is waterlogged
Correct Answer: B
Rationale: Aluminum becomes soluble and toxic to plant roots at
low pH (typically below 5.0-5.5). In neutral to alkaline soils,
aluminum forms insoluble compounds and is not available for
uptake.
5. Besides carbon, hydrogen, and oxygen, which of the
following are essential elements required in the largest
amounts by plants?
A. Iron, zinc, copper, manganese
B. Nitrogen, phosphorus, potassium
C. Calcium, sulfur, magnesium
D. Boron, chlorine, molybdenum
Correct Answer: B
Rationale: Nitrogen, phosphorus, and potassium are the primary
macronutrients required in the largest quantities after C, H, and
3
, O. They are often called "fertilizer elements" because they are
most commonly applied to correct deficiencies.
6. Denitrification would be highest under which set of
conditions?
A. Well-aerated, dry, sandy soil
B. No-till management, wet season, poorly drained soil
C. Conventional tillage, dry season, clay soil
D. High pH, high temperature, dry conditions
Correct Answer: B
Rationale: Denitrification is an anaerobic process where bacteria
convert nitrate (NO₃⁻) to nitrogen gas (N₂). It requires
waterlogged, oxygen-depleted conditions, which are common in
no-till soils with poor drainage during wet seasons.
7. For no-till corn, why is a slightly higher rate of nitrogen
fertilizer recommended compared to conventional tillage?
A. No-till soils have lower organic matter
B. Nitrogen losses to immobilization and denitrification are higher
in no-till systems
C. Corn roots cannot reach deep nitrogen in no-till
D. No-till increases nitrogen volatilization from urea
4
PRACTICE EXAM NEWEST 2026 TEST BANK| CERTIFIED
CROP ADVISOR EXAM PREP WITH COMPLETE 650
REAL EXAM QUESTIONS AND CORRECT VERIFIED
ANSWERS/ ALREADY GRADED A+ (BRAND NEW!!)
1. A fertilizer with an analysis of 0-46-0 would be considered:
A. Urea
B. Triple superphosphate
C. Muriate of potash
D. Ammonium nitrate
Correct Answer: B
Rationale: A 0-46-0 analysis indicates 0% nitrogen, 46%
phosphate (P₂O₅), and 0% potash. This is triple superphosphate
(TSP), a concentrated phosphorus fertilizer. Urea is 46-0-0,
muriate of potash is 0-0-60, and ammonium nitrate is 34-0-0.
2. A soil has poor phosphorus availability. How will this
affect the observed response to added nitrogen fertilizers?
A. Nitrogen response will be enhanced by the low P
B. Nitrogen response will be limited by the inadequate P supplies
1
,C. There will be no effect on nitrogen response
D. Nitrogen will become toxic to plants
Correct Answer: B
Rationale: Liebig's law of the minimum states that crop growth is
limited by the scarcest nutrient. If phosphorus is deficient, plants
cannot utilize added nitrogen effectively because they lack the
energy (ATP) and root development needed to take up and
assimilate nitrogen.
3. Alfalfa plants with white flecks near the edges of their
leaflets are most likely deficient in which nutrient?
A. Nitrogen
B. Phosphorus
C. Potassium
D. Sulfur
Correct Answer: C
Rationale: Potassium deficiency in alfalfa appears as white or
yellow spots along leaflet margins, a condition called "white
fleck." As deficiency progresses, margins scorch and leaves curl.
Potassium is critical for protein synthesis, water regulation, and
enzyme activation in alfalfa.
2
,4. Aluminum toxicity is most likely to be a problem when:
A. Soil pH is very high (alkaline)
B. Soil pH is very low (acidic)
C. Organic matter content is high
D. Soil is waterlogged
Correct Answer: B
Rationale: Aluminum becomes soluble and toxic to plant roots at
low pH (typically below 5.0-5.5). In neutral to alkaline soils,
aluminum forms insoluble compounds and is not available for
uptake.
5. Besides carbon, hydrogen, and oxygen, which of the
following are essential elements required in the largest
amounts by plants?
A. Iron, zinc, copper, manganese
B. Nitrogen, phosphorus, potassium
C. Calcium, sulfur, magnesium
D. Boron, chlorine, molybdenum
Correct Answer: B
Rationale: Nitrogen, phosphorus, and potassium are the primary
macronutrients required in the largest quantities after C, H, and
3
, O. They are often called "fertilizer elements" because they are
most commonly applied to correct deficiencies.
6. Denitrification would be highest under which set of
conditions?
A. Well-aerated, dry, sandy soil
B. No-till management, wet season, poorly drained soil
C. Conventional tillage, dry season, clay soil
D. High pH, high temperature, dry conditions
Correct Answer: B
Rationale: Denitrification is an anaerobic process where bacteria
convert nitrate (NO₃⁻) to nitrogen gas (N₂). It requires
waterlogged, oxygen-depleted conditions, which are common in
no-till soils with poor drainage during wet seasons.
7. For no-till corn, why is a slightly higher rate of nitrogen
fertilizer recommended compared to conventional tillage?
A. No-till soils have lower organic matter
B. Nitrogen losses to immobilization and denitrification are higher
in no-till systems
C. Corn roots cannot reach deep nitrogen in no-till
D. No-till increases nitrogen volatilization from urea
4
