Ace 2026-2027 Exams Includes Frequently Tested Questions
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1. The graphic representation of the 12 USDA soil texture classes is called:
A. Soil profile
B. Soil triangle
C. Soil horizon chart
D. Soil map
Correct Answer: B. Soil triangle
2. The proportions of sand, silt, and clay in soil are known as:
A. Soil structure
B. Soil density
C. Soil texture
D. Soil composition
Correct Answer: C. Soil texture
3. A soil containing 20% clay, 35% sand, and 45% silt is classified as:
A. Sandy loam
B. Clay loam
C. Silt loam
D. Loam
Correct Answer: D. Loam
,4. At a minimum, soil should be tested every:
A. 1–2 years
B. 2–3 years
C. 3–5 years
D. 5–10 years
Correct Answer: C. 3–5 years
5. Soil pH greatly affects the solubility of:
A. Water
B. Organic matter
C. Nutrients
D. Microorganisms
Correct Answer: C. Nutrients
6. Silt is the smallest soil particle.
A. True
B. False
Correct Answer: B. False
7. Macropores include large spaces between particles, earthworm tunnels, and
root channels.
A. True
B. False
Correct Answer: A. True
8. Red-colored soils typically indicate poor drainage.
A. True
B. False
Correct Answer: B. False
,9. Standard soil test reports usually include nitrogen levels.
A. True
B. False
Correct Answer: B. False
10. A soil pH between 6.0 and 7.0 is ideal for many plants.
A. True
B. False
Correct Answer: A. True
11. Xylem transports food, water, and minerals throughout plants.
A. True
B. False
Correct Answer: A. True
12. Plants grown from bulbs (corms, tubers, rhizomes) are commonly sold as
bulbs.
A. True
B. False
Correct Answer: A. True
13. The waxy protective layer on leaves and stems is called:
A. Epidermis
B. Cuticle
C. Cortex
D. Phloem
Correct Answer: B. Cuticle
, 14. Rooting a stem while still attached to the parent plant is called:
A. Grafting
B. Budding
C. Layering
D. Cutting
Correct Answer: C. Layering
15. The pistil is the female part of a flower and includes the ovary.
A. True
B. False
Correct Answer: A. True
16. The best time to irrigate plants is:
A. Afternoon
B. Evening
C. Morning
D. Midnight
Correct Answer: C. Morning
17. Plants require how many essential elements for normal growth?
A. 10
B. 12
C. 16
D. 20
Correct Answer: C. Sixteen