Seed Quantity Formula:
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The seed quantity calculation determines the amount of seed needed for a given area, taking into account the recommended seeding rate and the purity of the seed. This ensures optimal plant density and efficient use of resources.
The calculator uses the following equation:
Where:
Explanation: The equation accounts for the actual amount of viable seed needed by considering the purity of the seed lot.
Details: Accurate seed quantity calculation is crucial for achieving proper plant density, optimizing resource use, and ensuring successful crop establishment while minimizing waste.
Tips: Enter the area in acres, seeding rate in pounds per acre, and seed purity as a decimal between 0 and 1 (e.g., 0.95 for 95% pure seed). All values must be positive numbers.
Q1: Why is seed purity important in the calculation?
A: Seed purity accounts for the percentage of actual viable seed in the purchased product, ensuring you get enough viable plants.
Q2: What's a typical seeding rate for common crops?
A: Seeding rates vary widely by crop - from 2-3 lb/acre for some grasses to 100+ lb/acre for certain cereals.
Q3: Should I include germination rate in this calculation?
A: This basic calculation uses purity only. For more precision, you might divide the result by the germination rate (as decimal).
Q4: How does row spacing affect seed quantity?
A: This calculation assumes broadcast seeding. For row crops, you may need to adjust based on row spacing and in-row seeding rate.
Q5: Can I use this for small garden plots?
A: Yes, but convert area to acres (1 acre = 43,560 sq ft) or modify the formula to use square feet.