BLArch Bachelor of Landscape Architecture Horticulture and Planting Design 2 — Questions and Answers
Question 1: Which nutrient deficiency typically causes yellowing of leaves (chlorosis) in plants?
- Phosphorus
- Potassium
- Iron or Nitrogen (Correct answer)
- Calcium
Correct answer: Iron or Nitrogen
Chlorosis (yellowing) is most commonly caused by iron or nitrogen deficiency, as both are essential for chlorophyll production.
Question 2: What is the correct term for the seasonal shedding of leaves by deciduous trees in autumn?
- Abscission (Correct answer)
- Senescence
- Dormancy
- Defoliation
Correct answer: Abscission
Abscission is the biological process by which plants shed leaves, flowers, or fruit by forming a specialized layer of cells at the base of the petiole.
Question 3: Which planting technique involves grouping plants of the same species together for visual impact?
- Alternating
- Massing (Correct answer)
- Drifting
- Spotting
Correct answer: Massing
Massing groups multiple plants of the same species together to create bold, unified visual statements in the landscape.
Question 4: What is the recommended minimum soil depth for growing most large shade trees?
- 12 inches
- 18 inches
- 36 inches (Correct answer)
- 60 inches
Correct answer: 36 inches
Large shade trees typically require a minimum of 36 inches (3 feet) of suitable soil depth to support adequate root development.
Question 5: Which term describes a plant that completes its life cycle within a single growing season?
- Perennial
- Biennial
- Annual (Correct answer)
- Ephemeral
Correct answer: Annual
An annual plant germinates, flowers, sets seed, and dies all within one growing season, unlike perennials that live for multiple years.
Question 6: What is the primary function of mycorrhizal fungi in relation to landscape plants?
- Decompose organic matter
- Suppress weed growth
- Enhance nutrient and water uptake by roots (Correct answer)
- Fix atmospheric nitrogen
Correct answer: Enhance nutrient and water uptake by roots
Mycorrhizal fungi form symbiotic relationships with plant roots, dramatically extending the root system's ability to absorb water and nutrients.
BLArch Bachelor of Landscape Architecture Horticulture and Planting Design 2
Which nutrient deficiency typically causes yellowing of leaves (chlorosis) in plants?