1. What is the McGill Compost Calculator?

The McGill compost calculator helps determine the volume and weight of compost needed to amend soil based on the area to be covered and the desired depth of application.

2. How Does the Calculator Work?

The calculator uses the simple volume formula:

Where:

• \( Area \) — Area to be covered (square feet)
• \( Depth \) — Desired compost depth (inches)

Explanation: The calculator converts depth from inches to feet, then calculates volume in cubic feet. It also estimates weight based on standard compost density.

3. Importance of Compost Calculation

Details: Proper compost application rates are crucial for soil health. Too little won't provide benefits, while too much can cause nutrient imbalances.

4. Using the Calculator

Tips: Measure your garden area accurately. For new gardens, 2-3 inches of compost is typical. For maintenance, 1/2 to 1 inch annually is often sufficient.

5. Frequently Asked Questions (FAQ)

Q1: How do I measure my garden area?
A: For rectangular areas, multiply length by width. For irregular shapes, break into smaller rectangles and add the areas together.

Q2: What's the ideal compost depth?
A: For vegetable gardens: 2-4 inches. For lawns: 1/4-1/2 inch. For trees/shrubs: 2-3 inches (keep away from trunks).

Q3: How does compost density affect calculations?
A: This calculator assumes 1000 lbs per cubic yard. Very wet or dense compost may weigh more, while dry/fluffy compost may weigh less.

Q4: Should I till compost into the soil?
A: For most applications, simply top-dressing is sufficient. Tilling is only needed for very compacted soils.

Q5: How often should I apply compost?
A: Annually for most gardens. Sandy soils may benefit from more frequent, lighter applications.