1. What is the Sand Dune Planting Calculator?

The Sand Dune Planting Calculator helps determine the optimal number of trees per hectare for dune stabilization projects in New Zealand. It calculates planting density based on row and tree spacing.

2. How Does the Calculator Work?

The calculator uses the planting density formula:

Where:

• Row spacing — Distance between rows of trees (meters)
• Tree spacing — Distance between trees within a row (meters)
• 10,000 — Number of square meters in one hectare

Explanation: The formula calculates how many trees fit in one hectare based on the planting grid dimensions.

3. Importance of Planting Density

Details: Proper planting density is crucial for effective dune stabilization, ensuring adequate coverage while allowing space for plant growth.

4. Using the Calculator

Tips: Enter row spacing and tree spacing in meters. Typical values range from 1-3 meters for dune planting projects.

5. Frequently Asked Questions (FAQ)

Q1: What's the ideal spacing for sand dune planting?
A: In NZ, common spacing is 1.5-2.5m between rows and 1-2m within rows, depending on species and site conditions.

Q2: Which species are best for NZ sand dunes?
A: Native species like pingao, spinifex, and native sand-binding grasses are commonly used for dune stabilization.

Q3: When is the best time to plant?
A: In New Zealand, autumn and early winter (April-July) are ideal for dune planting when soil moisture is good.

Q4: How does spacing affect plant survival?
A: Closer spacing provides faster coverage but may require more plants and maintenance. Wider spacing is more economical but takes longer to stabilize.

Q5: Should spacing vary by location?
A: Yes, exposed frontal dunes typically need closer spacing than more sheltered back dunes.