Statistical Tools for Assessing Yield Comparisons

Following up to our post about accurate yield comparisons, understanding the tools used to analyze harvest results is just as important. For starters, if you receive local data from different sources, review it closely. When data varies, interpreting harvest results to make informed seed selection decisions is more challenging. 

Statistical data analysis tools
To help read yield data, take the following statistical factors into account.
  • Paired comparisons: Measuring head-to-head comparisons of 2 hybrids or varieties across multiple locations is the simplest way to analyze harvest results. 
    • If possible, compare several years of data from multiple locations. This helps improve odds of predicting a higher-yielding or better-adapted product across diverse environments. 

  • Least Significant Difference (LSD): Measures the difference between 2 treatments by confirming if the difference is true or trial error. The LSD is also known as the minimum yield difference needed to confirm if 1 product performed better than the other. 
    • LSD is strongly influenced by the number of locations used to measure the difference between 2 hybrids or varieties. When the number of locations increases, LSD usually decreases due to less chance of trial error.
    • If 2 yield averages vary more than the LSD value, the difference is due to the product and will likely occur again. If product yield averages are less than the LSD value, the observed difference is likely due to trial error or “noise”. 
  • Probability: A level of confidence that the result occurring will repeat over time. 
    • The probability of identifying the best-yielding hybrid goes down as entry numbers increase. 
    • The probability of identifying the best-yielding hybrid goes up as location numbers increase.

Contact your Golden Harvest Seed Advisor for help selecting the right hybrids and varieties for your fields, or for additional agronomic insights.

Photos are either the property of Syngenta or used under agreement.

​​​​​​​Syngenta hereby disclaims liability for third-party websites.


Name is required
Please enter a valid email address
Please enter a valid zip code
Sign Up

Your submission has been received, thanks!


You are viewing from

Thank you for visiting the Golden Harvest website. We understand how important it is for you to find agronomic and product information pertinent to your local area. Please enter your zip code or select your area below to ensure you are seeing the information that matters most to you.
Learn more about regions >


We’re sorry. Golden Harvest is not available in this area. Please try another zip code or contact a Golden Harvest Seed Advisor for more information.

Is this page helpful to you?

How can we improve
this page? (optional)

Can you tell us your
role in agriculture? (optional)

Thanks for the feedback.

We appreciate your participation