Ohio Crop Performance Trials

Weather data summary for the 2013-growing season

Alfalfa Trials

Performance summary – Standard trials (insecticide applied)

Wooster, Ohio – 2010 Seeding

South Charleston, Ohio – 2011 Seeding

North Baltimore, Ohio – 2012 Seeding

Wooster, Ohio – 2013 Seeding

Clover Trials

Red Clover - South Charleston, Ohio – 2013 Seeding

White Clover - South Charleston, Ohio – 2013 Seeding

Annual Grass Trials

Annual Ryegrass Variety Trial – South Charleston, Ohio – 2012 Fall Seeding

Annual Ryegrass Variety Trial – South Charleston, Ohio – 2013 Fall Seeding

Address of Marketers

Download files of yield data for 2013:

All Yield Trials - PDF for Printing

Alfalfa Yield Trials - Excel

Clover Yield Trials - Excel

Grass Yield Trials - Excel

Forage Variety Trials in Other States

Forage Quality and Disease Information from Wisconsin and Minnesota


2013 Ohio Forage Performance Trials


J.S. McCormick, Research Associate, Department of Horticulture and Crop Science

R.M. Sulc, Professor / Extension Forage Agronomist, Dept. of Horticulture and Crop Science

D. J. Barker, Professor, Department of Horticulture and Crop Science


Joe Davlin, Manager, Western Agricultural Research Station, OARDC
Matt Davis, Manager, Northwest Agricultural Research Station, OARDC
Lynn Ault, Manager, Schaffter Farm, Wooster, OARDC


This report is a summary of performance data collected from forage variety trials in Ohio during 2013, including commercial varieties of alfalfa, red clover, white clover and annual ryegrass in tests planted in 2010 to 2013 across three sites in Ohio: South Charleston, Wooster, and North Baltimore. For more details on forage species and management, see the Ohio Agronomy Guide, Ohio State University Extension Bulletin 472, which can be purchased from Ohio State University Extension's eStore at http://estore.osu-extension.org/.

Interpreting Yield Data

Yield data are reported in Tables 2 through 10.  Details of establishment and management of each test are listed in footnotes below the tables.  Least significant differences (LSD) are listed at the bottom of Tables 3 through 10.  Differences between varieties are significant only if they are equal to or greater than the LSD value.  If a given variety out yields another variety by as much or more than the LSD value, then we are 95% sure that the yield difference is real, with only a 5% probability that the difference is due to chance alone.  For example, if variety X is 0.50 ton/acre higher in yield than variety Y, then this difference is statistically significant if the LSD is 0.50 or less.  If the LSD is 0.51 or greater, then we are less confident that variety X really is higher yielding than variety Y under the conditions of the test.

The CV value or coefficient of variation, listed at the bottom of each table is used as a measure of the precision of the experiment. Lower CV values will generally relate to lower experimental error in the trial. Uncontrollable or unmeasured variations in soil fertility, soil drainage, and other environmental factors contribute to greater experimental error and higher CV values. However, higher CV values can also occur simply as a result of the mean yield being low (eg. due to weather conditions), because the CV is a function of the mean yield. So a higher CV will often occur where yields are low despite there being no increase in experimental error.

Results reported here should be representative of what might occur throughout the state but would be most applicable under environmental and management conditions similar to those of the tests.  The relative yields of all forage legume varieties are affected by crop management and by environmental factors including soil type, winter conditions, soil moisture conditions, diseases, and insects. 


Alfalfa has the highest combined yield and quality potential of any adapted perennial forage grown in Ohio.  It is the state's largest single hay crop, being grown on about one-half of the total hay acres.  Alfalfa requires well-drained soils with near-neutral pH (6.5-7.0) for greatest production and persistence.  Alfalfa trials are initiated each year and data is collected for at least four years unless the stand becomes so depleted that further testing is no longer worthwhile; variety performance should be evaluated over several sites and years.

 Guidelines for Selecting Alfalfa Varieties

To capitalize on alfalfa's potential, select high-yielding varieties with resistance to problem diseases. Alfalfa variety rankings for a number of traits described below are reported on the University of Wisconsin forage website, at http://www.uwex.edu/ces/forage/pubs/varinfo.htm.

Consider these factors when selecting alfalfa varieties for Ohio:

1.      Yield.  Yield is critical to profitability of an alfalfa stand. Select varieties with high yields over several locations and years. Table 2 shows this comparison in percent of the average test yield. Varieties that perform equally well across several locations and years are adapted to a wider range of environmental conditions, which is important because soils may vary on your farm and weather conditions vary from year to year.

 2.      Persistence.  Another important consideration is how long the alfalfa stand will last. Study variety performance by age of stand to get an estimate of longevity of productivity. Some varieties may decline with age more rapidly than others, which may influence your variety choice depending on how long you intend to keep the stand. For long-term rotations, choose varieties with good disease resistance and good performance in the fourth year. If you plan to harvest alfalfa for three years or less, then high performance during the first three years should be given priority.

 3.      Fall dormancy (FD).  Alfalfa varieties with fall dormancy ratings of 1 through 5 are considered adequately winter hardy for Ohio conditions while those of 6 or higher are not considered adapted. Varieties with higher fall dormancy ratings tend to grow at a lower temperature, so they begin growth earlier in the spring and continue growth later into the fall. The fall dormancy rating does not correlate well with winter hardiness within the range of varieties adapted to the Midwest USA.

 4.      Disease resistance.  Variety selection based on yield performance alone is less satisfactory than selections that also consider disease resistance characteristics. Resistance to specific disease-causing pathogens may be the most important attribute in an alfalfa variety. Pathogens can dramatically reduce yield and persistence of susceptible varieties. In an evaluation of older versus newer alfalfa varieties we found that newer varieties yielded more and persisted longer than older varieties, primarily because of improved resistance to diseases that affected the trial.

 5.      Insect resistance. 

Alfalfa varieties have been developed for resistance to potato leafhopper (PLH), which is the most consistently damaging insect pest of alfalfa in Ohio. The PLH resistant varieties are not resistant to the alfalfa weevil, and they will need to be protected from that pest like all standard alfalfa varieties when weevil populations exceed the economic action threshold.

 6.      Compare to check variety.  For comparisons of varieties across several trials, always compare varieties to the same check variety planted within the trial. The variety Vernal is used as a check in all Ohio trials and is commonly included in trials in other states. Another good way to compare varieties across trials is to look at their yield in relation to the trial average reported in Table 2.

7.      Use good management.  No variety can produce well under poor management. Good management considers all aspects of alfalfa production: seed bed preparation, liming and fertilization, seeding, pest control, harvest, storage, and post harvest treatment. Many newer varieties are better adapted to intensive management.


Summary of 2013 Crop Conditions


Total rainfall for the season was above normal at all locations, with the greatest deviation being at N. Baltimore (4.6 inches above normal). Rainfall in May and August was well below normal at all locations. Average monthly temperatures were above normal in May, but tended to be below normal for July through October at all locations.


The established trial at Wooster had the highest yields, averaging over 6.90 tons/acre and just over one ton more than the average yield in 2011 and 2012. A new spring seeding at Wooster performed very well with three harvests taken for a total annual yield of 4.05 tons / acre when averaged across all varieties. Alfalfa weevil populations were present at North Baltimore and required an insecticide application. Insecticide applications were used at all locations for control of potato leafhopper (PLH) in the standard yield trials.

Clover: Red & White

Red and white clover trials were seeded in 2013 at South Charleston. Trials were sprayed after the first harvest for potato Leafhopper (PLH) control to aid new growth due to the high numbers of PLH. Red clover is better adapted than alfalfa to soils that are somewhat poorly drained and slightly acidic; however, greatest production will occur on well-drained soils with high water-holding capacity and pH above 6.0. Red clover is not as productive as alfalfa in the summer and it generally persists for a shorter time than alfalfa. New varieties are capable of persisting into a third year. While clover is a short-lived perennial that is well suited for pastures. It spreads and persists over time by vegetative propagation of stolons and by natural reseeding. White clover tolerates periods of poor drainage, but does poorly in dry weather.

  Annual Ryegrass

This trial (Table 9) was harvested once in November 2012 and four times in 2013. Excellent growing conditions with adequate rainfall at this site through June provided for high yields of annual ryegrass this year. The second trial (Table 10) was planted in September of 2013 and was only harvested once in 2013. Additional harvest for the second trial will occur in 2014. Annual ryegrass is a cool-season annual bunch grass that is highly palatable and digestible. It has high seedling vigor and is well adapted to either conventional or no-till establishment methods.



Inclusion of entries in Ohio Alfalfa Performance Trials does not constitute an endorsement of a particular entry by The Ohio State University, Ohio Agricultural Research and Development Center, or Ohio State University Extension. Where trade names appear, no discrimination is intended, and no endorsement is implied by The Ohio State University, Ohio Agricultural Research and Development Center, or Ohio State University Extension.

Go to Ohio Crop Performance

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Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, Keith L. Smith, Director, Ohio State University Extension.