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Cover Crop Seeding Rate Calculator Online

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Growing cover crops can improve soil health, enhance biodiversity, suppress weeds, and manage pest and disease levels, among other benefits. But it's crucial to understand how to calculate the seeding rate for optimal cover crop establishment. That's where the cover crop seeding rate calculator comes into play.

The Formula

The formula utilized for the cover crop seeding rate calculation considers several factors, such as the desired stand of plants per acre, expected seed loss, number of seeds per pound, and expected seed dormancy. The formula used is as follows:

Seeding rate (lbs/acre) = [(Desired stand (plants/acre) / (1 - Expected stand loss (%))] / [Seed per lb x (1 - Expected seed dormancy (%))]

Let's break down the variables in this formula:

  • Desired Stand (plants/acre): The number of plants you want per acre at the end of the growing season.
  • Expected Stand Loss (%): The estimated percentage of plants that will not survive to the end of the growing season.
  • Seeds Per Pound: The number of seeds in one pound. This varies depending on the type of cover crop.
  • Expected Seed Dormancy (%): The estimated percentage of seeds that will not germinate.

An Example of Using the Calculator

Let's consider an example to understand how the calculator works. Suppose you are planning to plant rye as a cover crop. You want a final stand of 1,000,000 plants per acre. You estimate a stand loss of 10%, and you know that rye has about 18,000 seeds per pound and a seed dormancy rate of 5%.

Here are the inputs for the calculator:

  • Desired Stand (plants/acre): 1,000,000
  • Expected Stand Loss (%): 10
  • Seeds Per Pound: 18,000
  • Expected Seed Dormancy (%): 5

Plugging these numbers into our formula, we get:

Seeding Rate (lbs/acre) = [(1,000,000 / (1 - 0.10))] / [18,000 x (1 - 0.05)]

The calculator performs this calculation and provides the seeding rate in lbs per acre.

Remember to hit the 'Reset' button to clear all inputs if you want to perform another calculation. The cover crop seeding rate calculator is a simple, efficient tool to help you get the most out of your cover crops.

Please note, while this calculator provides a good baseline, field conditions, the seed lot's actual germination rate, and other factors might influence the seeding rate. Always observe your fields and adjust your rates as necessary.


The cover crop seeding rate calculator is an indispensable tool for any farmer or gardener looking to optimize their cover crop planting. Understanding how to use it effectively can result in a healthier, more productive soil ecosystem.

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