Exam Questions And Correct Answers

Certified Crop Advisor (CCA) Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which nutrient is most commonly associated with leaf yellowing

starting at the tip and moving along the midrib?

• Nitrogen
• Phosphorus
• Potassium
• Calcium

Rationale: Potassium deficiency typically causes chlorosis at leaf margins

and tips, progressing along the midrib.

• What is the primary benefit of using cover crops in cropping systems?
• Increase pesticide resistance
• Reduce soil erosion and improve soil health 1 / 4

• Increase seed size
• Decrease rainfall

Rationale: Cover crops help reduce soil erosion, increase organic matter,

and improve soil structure.

• Which soil texture holds the most water available to plants?
• Sand
• Loam
• Clay
• Silt

Rationale: Loam balances sand, silt, and clay, retaining water while

allowing drainage.

• When calibrating a sprayer, what is the most important factor to ensure

accurate application?

• Pump pressure only
• Nozzle color only
• Flow rate and travel speed
• Tank size

Rationale: Accurate calibration depends on matching flow rate to travel

speed to achieve intended application rate.

• Which of the following is a symptom of nitrogen deficiency?
• Interveinal chlorosis on older leaves
• Purple stems and leaves 2 / 4

• Uniform yellowing of older leaves
• Leaf tip necrosis

Rationale: Nitrogen is mobile; deficiency symptoms appear on older leaves

first as yellowing.

6. Phosphorus deficiency in plants typically results in:

• Leaf tip burn
• Stunted growth and dark green or purplish leaves
• Wilting
• Necrotic spots

Rationale: Phosphorus deficiency slows growth and can cause purple

coloration due to anthocyanin accumulation.

• Which of the following practices most effectively reduces nutrient

leaching?

• Deep tillage
• Overhead irrigation
• Split fertilizer applications
• Fall plowing

Rationale: Splitting fertilizer applications reduces the risk of nutrients

being washed beyond the root zone.

• What is the ideal soil pH range for most crops?

A. 4.5–5.0

B. 6.0–7.0 3 / 4

C. 7.5–8.5

D. 5.0–5.5

Rationale: Most crops grow best in slightly acidic to neutral soils (6.0–7.0).

• Which irrigation method is most efficient for reducing water loss?
• Flood irrigation
• Furrow irrigation
• Drip irrigation
• Sprinkler irrigation

Rationale: Drip irrigation delivers water directly to the root zone,

minimizing evaporation and runoff.

• Herbicide resistance management includes which practice?
• Applying herbicides only once per season
• Rotating modes of action
• Increasing herbicide rates indefinitely
• Planting the same crop repeatedly

Rationale: Rotating herbicide modes of action reduces the likelihood of

developing resistant weed populations.

• Which soil property most strongly affects nutrient availability?
• Color
• Texture
• pH
• Temperature
• / 4