Seed Rate Calculator
Free seed rate calculator. Determine bulk seeding rates using Pure Live Seed (PLS) calculations for accurate crop establishment and efficient seed purchasing.
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Calculate Optimal Seeding Rates
Proper seeding rate is crucial for crop establishment and yield. Our calculator uses Pure Live Seed (PLS) methodology to account for germination and purity rates, helping you determine exactly how much seed to purchase for your field size while factoring in expected field losses.
Understanding Seeding Rate Calculations
Seeding rate calculations convert your target plant population into the amount of bulk seed needed. The key is accounting for seed quality through Pure Live Seed (PLS) percentage, which combines germination rate and seed purity. This ensures you plant enough seeds to achieve your desired stand.
Bulk Seeding Rate Formula
Bulk Rate (lbs/acre) = Target Plants / (Seeds/lb Ă PLS%)Why Calculate Seeding Rates?
Optimal Stand Establishment
Achieve target plant populations for maximum yield potential and crop performance.
Cost Efficiency
Avoid over-seeding that wastes expensive seed or under-seeding that reduces yields.
Seed Quality Adjustment
Account for germination and purity rates to compensate for lower-quality seed lots.
How to Use This Calculator
Common Applications
Row Crop Planning
Calculate corn, soybean, and wheat seeding rates for precision planters.
Forage Establishment
Determine alfalfa, clover, and grass seed rates for pasture and hay fields.
Cover Crop Mixes
Calculate component rates when blending multiple cover crop species.
Seed Purchasing
Know exactly how many bags to order for your acreage and avoid costly over-ordering.
Frequently Asked Questions
PLS is the percentage of seed that is both pure (the intended species) and viable (capable of germinating). It's calculated as Germination% à Purity% á 100. For example, seed with 90% germination and 98% purity has 88.2% PLS.