Tennessee Yield Data
Persist has been independently tested in Tennessee since 1990. And trial after trial, against old varieties and new varieties, Persist continues to produce top yields, almost always higher than any other variety. High yields and extra persistence is what makes Persist a great choice for Tennessee.
Below you will find first a summary table of the most recent Tennessee data, followed by a breakdown by location.
|Variety||Greeneville 08-11||Milan 08-11||Spring Hill 07-10||Crossville 07-10||All Locations 08-11|
|3-Yr Total||3-Yr Total||3-Yr Total||3-Yr Total||Average|
|LSD ( P=.05)||2.18||0.84||0.82||1.18|
|Yield in Tons Dm/acre|
Tennessee Trials by Location
- Spring Hill
In the fall of 2007 a forage trial study was planted at Crossville, TN. Irrigation was applied only at time of establishment. 60# of N was applied at green-up. Another 30# of N was apppied both after first cutting and in early Sept.
Orchardgrass yield difference can be significant. For example in this trial, Persist produced 38% more tonnage than the lowest yielding variety. That's a bunch of hay!
Spring Hill, Tennessee
In the fall of 2007 a forage trial study was planted at Spring Hill, TN. Irrigation was applied only at time of establishment. 60# of N was applied at green-up. Another 30# of N was apppied both after first cutting and in early Sept.
Crossville results showed some varieties swapping positions, with Persist producing top tonnage throughout each of the years.
In the fall of 2008 a forage trial study was planted at Greeneville, TN. Irrigation was applied only at time of establishment. 60# of N was applied at green-up. Another 30# of N was apppied both after first cutting and in early Sept.
While this trial isn't showing statistical difference between the entries, we are pleased to report the highest numeric yielding variety was Persist and produced 22% more hay than the lowest entry.
In the fall of 2008 a forage trial study was planted at Milan, TN. Irrigation was applied only at time of establishment. 60# of N was applied at green-up. Another 30# of N was apppied both after first cutting and in early Sept.
This trial showed a statistical difference in yield between various varieties, with Persist performing equal to the top variety, and out-yielding the lowest entry by 53%!
In the fall of 1989 a forage trial study was planted at Knoxville, TN where dry mater yield data, by individual cutting date was obtained for five years. The test included Persist (called Syn-2 at the time), and six commercially grown cultivars.
Yields of Persist exceeded that of the mean every year. Of particular significance was its superior performance in the last two years of the trial - indicating longer persistence than the other cultivars. Additionally, Persist was almost always the highest yielding variety during the last two or three cuts.
Tennessee Trials by Year
If you are really interested in how Persist pulls away from the pack over time, scan through the next five tables and notice its performance compared to the other varieties in the trial. Also take note of the later cuttings. Persist is almost always on top!
|Cultivar||April 5||May 15||June 13||July 18||Aug 24||Nov 15||Total|
|Cultivar||Apr 18||May 21||Jun 28||Aug 23||Sept 24||Total|
|Cultivar||Apr 23||May 26||Sept 11||Total|
|Cultivar||Apr 30||May 26||Sep 10||Nov 12||Total|
|Cultivar||May 13||Aug 25||Dec 13||Total|
Kentucky Yield Data
Every year, the University of Kentucky (UKY) reports results from their individual trials. Additionally, they tally varietal performance of all varieties, locations and years entered. According to UKY, the "varieties that have performed better than average over many years and at several locations have very stable performance." The following chart shows findings over the last sixteen years. The data is listed as a percentage of the mean of the commercial varieties entered in each specific trials. Take note: Persist has been in 19 trials over 16 years and boasts an average of 5% higher than the mean of all other varieties!
|Variety||Mean 2 (#trials)|
|Crown Royale Plus||103(2)|
|1 Yield shown as a percentage of the mean of the commercial varieties in the trial.|
|2 Mean only presented when respective variety was included in two or more trials.|
Nebraska Yield Data
The University of Nebraska ran an orchardgrass trial during 2002-2004 at Mead and North Platte. The Mead site was non-irrigated and received 25" of moisture the first year and 27" the second year. The North Plate site was irrigated and received 17" of rain plus 23.6" of irrigation the first year. The second year, total rainfall was 21.9" plus an additional 20" of irrigation.
While other varieties out-performed Persist in North Platte, under good irrigation and rainfall, no other variety had a higher yield score for the two years in Mead than Persist. In fact, Persist did so well that it was added to the NRCS's Recommended list for varieties for use across the state, in any soil condition and any location! For sure, Nebraska and Great Plains farmers will need to discover just how well Persist will do for their applications, but the initial results from this trial are very encouraging.
|'03 Yield||'04 Yield||2-yr Total||'03 Yield||'04 Yield||2-yr Total|
|*Highest score | Bolded varieties statistically equal to top score | Complete trial data available here|
Pennsylvania Yield Data
In the 2004 Rock Springs, PA grass trial, twelve orchardgrass varieties have been entered. The trial was seeded April 20th, 2004. PA researchers' fertility program includes applications of phosphorus and potash to meet the soil test requirements. Additionally, this trial received 70 lbs of N in early April with an additional 50 lbs of N applied after each harvest except the last one. While this trial has seen nearly half the entries maintain statistically equal yields, it is worth noting that at the end of 3.5 years, Persist, along with one other variety, had the top score for stand percentage. For more data visit the Penn State University by clicking here.
|Cultivar||Stand 10/9/07||2005 Yields||2006 Yields||2007 Yields||3-Yr Ave.|
|* Statistically equal to the top score | Orchardgrass data only|
Michigan Yield Data
Persist Orchardgrass has been tested at numerous locations in Michigan through Michigan State University with very positive results. While the number of entries in each trial are usually very small, Persist shows it has the ability to perform very well in this challenging climate.
Ohio Yield Data
Ohio State University Extension Service put out an orchardgrass yield trial in April 2006 at South Charleston, Ohio. Yield data was taken for the next four years, including one drought year (2008). The total yield for all four years placed Persist at 8% higher in yields over Potomac. This is consistent with data from Kentucky and Tennessee. It is also worth noting that in 2008, the drought year, Persist had the highest yields of all the commercial varieties. For more data visit OARDC's website .
Canadian Yield data
|Cultivars||3-Yr Mean Annual Yield*|
|* Mean Annual Yield is a particular calculation used by agrapoint.ca to compare varieties evaluated over different time periods in order to predict potential yields. Its purpose it attempt to accurately portray a variety's performance potential. A further clarification can be provided by agrapoint.ca|
Ilinois Yield Data
In the 2004 Urbana, IL grass trial, five orchardgrass varieties have been entered. The trial was seeded April 3rd, 2004 on silty-clay loam. Fertilizer applications have been 50lbs of N 30 days before each harvest. While the 3-yr total for each variety remains statistically equal, it is worth noting that the Persist was the highest yielding variety in the third year. If the trial continued on for multiple years, we would expect Persist to remain at the top of yield performance. For more data visit the University of Ilinois by clicking here .
|Cultivar||2005 Yields||2006 Yields||2007 Yields||3-Yr Total|
|* Statistically equal to the top score|