C27 License Water Conservation and Drought-Tolerant Landscaping 1 — Questions and Answers
Question 1: What is the primary goal of xeriscaping in residential landscaping?
- Maximizing lawn coverage
- Reducing water usage through drought-tolerant design (Correct answer)
- Installing decorative water features
- Increasing soil fertilization
Correct answer: Reducing water usage through drought-tolerant design
Xeriscaping is a landscaping approach designed to reduce or eliminate the need for supplemental irrigation by using drought-tolerant plants and efficient design.
Question 2: What does ET stand for in landscape irrigation scheduling?
- Evapotranspiration (Correct answer)
- Environmental Temperature
- Effective Timing
- Emission Technology
Correct answer: Evapotranspiration
ET (evapotranspiration) is the combined water loss from soil evaporation and plant transpiration, used to schedule efficient irrigation.
Question 3: Which type of mulch is most effective for conserving soil moisture in drought-tolerant landscapes?
- Gravel mulch
- Rubber mulch
- Organic wood chip mulch (Correct answer)
- Synthetic turf
Correct answer: Organic wood chip mulch
Organic wood chip mulch conserves soil moisture by reducing evaporation, moderating soil temperature, and improving soil structure over time.
Question 4: Under California's Model Water Efficient Landscape Ordinance (MWELO), which projects must submit a landscape documentation package?
- All projects over 500 square feet
- New or rehabilitated landscapes of 2,500 square feet or more (Correct answer)
- Only commercial projects regardless of size
- Projects exceeding $10,000 in value
Correct answer: New or rehabilitated landscapes of 2,500 square feet or more
MWELO requires a landscape documentation package for new or rehabilitated landscapes with 2,500 square feet or more of landscaped area.
Question 5: Which California agency is responsible for setting statewide outdoor water use restrictions that affect landscaping contractors?
- California Department of Food and Agriculture
- State Water Resources Control Board (Correct answer)
- California Landscape Contractors Association
- Department of Consumer Affairs
Correct answer: State Water Resources Control Board
The State Water Resources Control Board sets statewide water use regulations, including outdoor irrigation restrictions for landscaping projects.
Question 6: What is a 'hydrozone' in landscape design?
- A zone with underground water features
- A grouping of plants with similar water needs irrigated together (Correct answer)
- A section reserved for swimming pools
- A high-pressure irrigation area
Correct answer: A grouping of plants with similar water needs irrigated together
A hydrozone groups plants with similar water requirements so that irrigation can be managed efficiently and each zone receives only the water it needs.
C27 License Water Conservation and Drought-Tolerant Landscaping 1
What is the primary goal of xeriscaping in residential landscaping?