1. What is a Seeds per Hectare Calculator?

Definition: This calculator determines the number of seeds needed per hectare based on target plant population and expected germination rate.

Purpose: It helps farmers and agronomists optimize seed planting rates for maximum crop yield in Ontario's agricultural conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Seeds per ha — Seeds per hectare (seeds/ha)
• Target Population — Desired plants per m² (plants/m²)
• Germination Rate — Fraction that germinate (0-1)
• 10000 — Conversion factor (m² per hectare)

Explanation: The target plant population is adjusted for expected germination rate and scaled up to hectare-sized planting areas.

3. Importance of Seed Rate Calculation

Details: Proper seed rate calculation ensures optimal plant density, maximizes yield potential, and prevents over-seeding which can increase costs unnecessarily.

4. Using the Calculator

Tips: Enter your target plant population (typically 200-400 plants/m² for wheat, 75-90 for soybeans) and expected germination rate (default 0.85 or 85%). Germination rate must be between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical germination rate?
A: Most certified seeds have 85-95% germination rates. Always check your seed tag for actual rates.

Q2: How do I determine target population?
A: Consult OMAFRA guidelines or seed company recommendations based on crop type, variety, and field conditions.

Q3: Should I adjust for expected field losses?
A: Yes, you may want to add 5-10% to the calculated rate to account for field conditions and potential losses.

Q4: Does this work for all crop types?
A: Yes, the formula is universal, but target populations vary significantly between crops.

Q5: How does Ontario's climate affect seeding rates?
A: Cooler springs may require higher rates to compensate for slower emergence, while ideal conditions may allow for lower rates.