FAQ

How do I move the box to see plot in a different area?
Zoom out on the map to see a broader view, then move your mouse to the desired location, and double click on the new location on the map. The box will move to that location and select any plot that falls within the box. You can continue to move as often as you like by repeating this same procedure.

How do I see the entire plot?
Open the individual plots by clicking on the + button. You will see the top 15 yielding hybrids/varieties or all the hybrids/varieties meeting the criteria you requested. If you want to see the entire plot, click the "Show Entire Plot" button on the bottom right portion of the plot display. This will display all entries in the plot.

Why are the Placement Characteristics, Agronomic Characteristics, and Disease Ratings not always the same as what I see in the seed company catalog?
Not all seed companies use the same rating system to communicate their seed characteristics. IAS has evaluated each seed company’s varietal information and has tried to standardize the ratings as much as possible. To find the most accurate information about a hybrid IAS recommends reviewing the characteristic information directly from the source seed company.

Why are some of the hybrids/variety Placement Characteristics, Agronomic Characteristics, and Disease Ratings listed as N/A (Not Available)?
IAS makes every effort to find any and all relative information about the products entered into the IAS Yield Trials, but for various reasons sometimes this information is not available or the seed companies prefer we not publish this information.

What does CV mean and how do I use this statistical tool?
CV, Coefficient of Variation measures the overall variability of a plot. A CV greater than 10 raises cause for concern. A CV slightly higher than 10% doesn’t mean the plot is invalid, but it should caution you and encourage you to look at other additional plots as a part of your decision making process.

Least Significant Difference = LSD
LSD is a statistical measure used in evaluating seed plots. It is used to determine which hybrids are truly out performing others. When using 0.10 LSD, this means we are 90% confident Hybrid A is out Yielding Hybrid B when the yield difference between the two hybrids are greater than the LSD value.

What is "Relative Normalized"?
In order for us to fairly compare hybrids and varieties from different plots locations we must normalize or equalize the plots. For example a plot in Northwest IN. may be located on a highly productive soil and had optimum growing conditions. While a plot located in Southwest Ohio may be located on marginal soils and had poor growing conditions. Before we can fairly summarize hybrids/varieties from these completely different yielding plots we must normalize them. The way we calculate the Relative Normalized Yield, Moisture, and Lodging are by simply dividing the hybrid/variety treatment (yield, moisture, and lodging) by their individual plot average.

Rather than showing a hybrid/variety performance +/- % of plot average, as we have in the past, we now report the normalized yield, moisture, and lodging by comparing it against the plot averages for the locations you have included in your summary (average yield of all plots in the search x hybrid’s normalized yield). This provides a more common and realistic numeric value you to look at. To see specific hybrid/variety performance, go to the By Single Plots section. All the detail plot information by hybrid/variety are provided in the section.