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CERTIFIED CROP ADVISOR INTERNATIONAL
TEST LATEST 2025/2026 COMPLETE TEST
ACCURATE QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) A
NEW UPDATED VERSION |GUARANTEED
PASS.
1. Which macronutrient is most commonly associated with
vegetative growth in plants?
A) Phosphorus
B) Potassium
C) Nitrogen
D) Calcium
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Answer: C) Nitrogen
Rationale: Nitrogen is essential for vegetative growth as it is a
major component of amino acids, proteins, and chlorophyll. It is
the nutrient plants need in the largest quantity for leaf and
stem development. Deficiency first appears in older leaves
due to its mobility within the plant.
2. The 17 elements essential for plant nutrition include
which of the following?
A) C, H, O, N, P, K, Ca, Mg, S, B, Cl, Cu, Fe, Mn, Mo, Ni, Zn
B) C, H, O, N, P, K, Ca, Mg, S, Na, Cl, Cu, Fe, Mn, Mo, Ni, Zn
C) C, H, O, N, P, K, Ca, Mg, S, B, Cl, Cu, Fe, Al, Mo, Ni, Zn
D) C, H, O, N, P, K, Ca, Mg, S, B, Cl, Cu, Fe, Mn, Mo, Co, Zn
Answer: A) C, H, O, N, P, K, Ca, Mg, S, B, Cl, Cu, Fe, Mn, Mo,
Ni, Zn
Rationale: The 17 essential elements for plant nutrition are
carbon (C), hydrogen (H), oxygen (O), nitrogen (N),
phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg),
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sulfur (S), boron (B), chlorine (Cl), copper (Cu), iron (Fe),
manganese (Mn), molybdenum (Mo), nickel (Ni), and zinc (Zn).
3. Which of the following is NOT an essential nutrient for
plants?
A) N
B) Cu
C) Na
D) H
Answer: C) Na
Rationale: Sodium (Na) is not considered an essential nutrient
for most plants, although it may serve as a beneficial element
for some species. Essential nutrients must meet specific criteria
including being required for a plant to complete its life cycle.
4. Macronutrients are defined as elements required by
plants in relatively large amounts. Which of the following is
a macronutrient?
A) Cu
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B) S
C) Mn
D) B
Answer: B) S
Rationale: Sulfur (S) is a macronutrient, along with N, P, K, Ca,
and Mg. Micronutrients include Cu, Mn, B, Zn, Fe, Mo, Cl, and
Ni.
5. Which of the following plant nutrients is a cation in the
soil?
A) Cl
B) K
C) Mo
D) S
Answer: B) K
Rationale: Potassium (K) exists as the cation K+ in soil solution.
Cations are positively charged ions that are attracted to
CERTIFIED CROP ADVISOR INTERNATIONAL
TEST LATEST 2025/2026 COMPLETE TEST
ACCURATE QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS) A
NEW UPDATED VERSION |GUARANTEED
PASS.
1. Which macronutrient is most commonly associated with
vegetative growth in plants?
A) Phosphorus
B) Potassium
C) Nitrogen
D) Calcium
,Page 2 of 216
Answer: C) Nitrogen
Rationale: Nitrogen is essential for vegetative growth as it is a
major component of amino acids, proteins, and chlorophyll. It is
the nutrient plants need in the largest quantity for leaf and
stem development. Deficiency first appears in older leaves
due to its mobility within the plant.
2. The 17 elements essential for plant nutrition include
which of the following?
A) C, H, O, N, P, K, Ca, Mg, S, B, Cl, Cu, Fe, Mn, Mo, Ni, Zn
B) C, H, O, N, P, K, Ca, Mg, S, Na, Cl, Cu, Fe, Mn, Mo, Ni, Zn
C) C, H, O, N, P, K, Ca, Mg, S, B, Cl, Cu, Fe, Al, Mo, Ni, Zn
D) C, H, O, N, P, K, Ca, Mg, S, B, Cl, Cu, Fe, Mn, Mo, Co, Zn
Answer: A) C, H, O, N, P, K, Ca, Mg, S, B, Cl, Cu, Fe, Mn, Mo,
Ni, Zn
Rationale: The 17 essential elements for plant nutrition are
carbon (C), hydrogen (H), oxygen (O), nitrogen (N),
phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg),
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sulfur (S), boron (B), chlorine (Cl), copper (Cu), iron (Fe),
manganese (Mn), molybdenum (Mo), nickel (Ni), and zinc (Zn).
3. Which of the following is NOT an essential nutrient for
plants?
A) N
B) Cu
C) Na
D) H
Answer: C) Na
Rationale: Sodium (Na) is not considered an essential nutrient
for most plants, although it may serve as a beneficial element
for some species. Essential nutrients must meet specific criteria
including being required for a plant to complete its life cycle.
4. Macronutrients are defined as elements required by
plants in relatively large amounts. Which of the following is
a macronutrient?
A) Cu
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B) S
C) Mn
D) B
Answer: B) S
Rationale: Sulfur (S) is a macronutrient, along with N, P, K, Ca,
and Mg. Micronutrients include Cu, Mn, B, Zn, Fe, Mo, Cl, and
Ni.
5. Which of the following plant nutrients is a cation in the
soil?
A) Cl
B) K
C) Mo
D) S
Answer: B) K
Rationale: Potassium (K) exists as the cation K+ in soil solution.
Cations are positively charged ions that are attracted to
