The purpose of the Corn Hybrid Performance Tests is to evaluate various corn hybrids for grain yield and other important agronomic characteristics. Results of the test can assist farmers in selecting hybrids best suited to their operation.
The grain results is a report of 10 test locations across the state of Pennsylvania. These locations are chosen within 4 growing zones. Maturities across these zones range from 85 to 115 days relative maturity.
The silage results is a report of 11 test locations across the state of Pennsylvania. This corn hybrid evaluation for silage production is a collaborative effort by Penn State and the Professional Dairy Managers of Pennsylvania (PDMP). These locations are chosen within 4 growing zones. Maturities across these zones range from 85 to 119 days relative maturity.
New For 2018
We have added Ash, Fat (Total Fatty Acids), NDFD30hr (previously 24hr), NDFD120hr, and NDFD240hr to data spreadsheets.
Starch digestibility data is also available at 4 locations. This starch digestibility test differs from the "Starch" column in the report. The Starch % will still be posted, but an 4 additional spreadsheets labeled "IVSD" (In-Vitro Starch Digestibility) will have a starch digestibility column. This test is performed using wet chemistry, instead of NIR, run at a 4 hr incubation period at a 1 mm grind.
Old, but still new for 2018
Below is a "story" of uNDF240, written by Cargill nutritionist and PDMP committee member, Chris Canale.
Our corn hybrid evaluation reports now contain an new forage quality parameter called uNDF240. We developed a few questions below to share some of the potential of this new measurement.
What is uNDF240?
uNDF stands for undigested neutral detergent fiber (uNDF). NDF, commonly referred to as “cell wall,” is comprised of cellulose, hemicellulose, and lignin. The number “240” refers to the amount of NDF remaining undigested after 10 days (240 hours) in the rumen. The most common technique to determine uNDF is by in situ or in vitro incubation; once enough data is obtained, either technique can be used to create a calibration, or prediction, using NIR.
uNDF is a problem because it’s NDF that can’t be fermented to end products -- VFA -- that are used to make milk and milk components. And, once ingested by the cow, uNDF may take up space, creating too much rumen fill. The result: lower dry matter intake. In a sense, when forages and diets are too high in uNDF, it’s like making a cow’s engine run on 4 cylinders instead of 6.
What impacts uNDF?
uNDF is determined by environment and genetics. In other words, growing conditions play a large role in the formation of the undigested fraction (uNDF). For example, 2018 corn silage has roughly 10%-units more uNDF than 2017 silage. The cool, wet conditions during early growth stages likely contributed to higher uNDF in 2018 corn silage plants. Genetics is a factor as well. BMR hybrids tend to have significantly lower uNDF than conventional hybrids. Forage uNDF240 values are determined by genetics and environment. Tile drainage should improve (lower) uNDF240 content of forages. Flood irrigation may increase uNDF240 content.
Why is uNDF relevant?
A growing body of literature and field experience tells us that uNDF can affect cow performance. Either intake, milk yield, and/or milk components can be affected.
One key element to uNDF is the digestibility of the NDF that is available for digestion. In other words, what is the digestibility of the NDF at time points leading up to uNDF? This year, we reported digestibility of NDF at 30, 120, and 240h. These time points can be used to determine the kinetics, or rate, of NDF digestion. In the past we only reported one time point, either 24 or 30 hours. This was useful, but the combination of multiple time points provide a better estimate of the overall rate of NDF digestion. Combining rate and extent of digestion with uNDF should help us better explain cow performance.
uNDF is not a new nutrient or measure. Researchers and nutritionists have been talking about uNDF for the past 20 years. Recently, though, experiments and models are “connecting the dots” linking uNDF to yield of milk and milk components. In the end, uNDF serves as another nutrient to fine-tune rations for dairy cows and help us develop better corn hybrids for feeding them.
Seed Company Contact Information
|Company||Trials1||Street Address||Phone||Web Address|
|AgriGold Hybrids||S||5381 Akin Rd, St. Francisville, IL 62460||800-262-7333||www.agrigold.com|
|Augusta Seeds||G S||PO Box 899, Verona, VA 24482||540-886-6055||www.augustaseed.com|
|Channel, LLC||G S||800 N. Lindbergh Blvd, St Louis, MO 63167||800-331-7201||www.channel.com|
|Chemgro Seeds||G S||PO Box 218, East Petersburg, PA 17520||800-346-4769||www.chemgro.com|
|CPS/Dyna-Gro Seed||G S||1140 Sweet Rd, East Aurora, NY 14052||716-912-5494||www.dynagroseed.com|
|Doebler's PA Hybrids||G S||1000 Commerce Pk Dr #106, Williamsport, PA||570-980-3906||www.doeblers.com|
|FS InVISION||S||308 NE Front St, Milford, DE 19963||607-842-6330||www.fsseed.com|
|Hubner Seed||G S||10280 West SR 28, West Lebanon, IN 47991||765-893-4428||www.hubnerseed.com|
|LG Seeds||G||1453 Rosedale Ave, Bucyrus, OH 44820||513-535-0992|
|Masters Choice||S||305 W Vienna St, Anna, IL 62906||618-833-6552||www.seedcorn.com|
|Mid-Atlantic Seeds||G S||204 St. Charles Way, #163E, York, PA firstname.lastname@example.org|
|Monsanto Corp-Dekalb||S||800 N. Lindbergh Blvd, St Louis, MO 63167||800-768-6387||www.monsanto.com|
|Mycogen||S||9330 Zionsville Rd, Indianapolis, IN 46268||717-327-3090||www.mycogenseeds.com|
|Dupont Pioneer||S||P.O. Box 1000 Johnston, IA 50131-0184||515-535-3200||www.pioneer.com|
|Prairie Hybrids||S||27445 Hurd Rd, Deergrove, IL 61243||717-371-1100||www.prairiehybrids.com|
|Seedway LLC||S||275 North Eighth St, Mifflinburg, PA 17844||570-939-1755||www.seedway.com|
|Syngenta Seeds||G S||PO Box 959, Minneapolis, MN 55440||856-381-7772||www.syngenta-us.com/seed|
|Local Seed Co.||G S||802 Rozelle St. Memphis TN 38104||901-260-6000||www.localseed.com|
Grain and Silage Cooperator Locations
Grain trial cooperators and location details
|County||City||Zone1||Name||Planting Date||Harvest Date|
|Centre||Rock Springs||1,2||Penn State Ag Research||5/2||10/18|
|Clinton||Lock Haven||2||Scott Munro||5/1||10/24|
|Dauphin||Hershey||3,4||Milton Hershey School||5/9||10/24|
|Indiana||Punxsutawney||1,2||Lyle and Nathan Stiteler||5/29||11/23|
1 Zone 1 = 1,600-1,950 degree days, Zone 2 = 1,950-2,300 degree days, Zone 3 = 2,300-2,650 degree days, Zone 4 = 2,650-3,100 degree days.
Silage trial cooperators and location details
|County||City||Group1||Name||Planting Date||Harvest Date|
|Centre||Rock Springs||G0,G1,G2||Penn State Ag Research||5/30||10/2, G2 NH2|
|Chester||West Grove||G2SC,G3,G4,BMR||Walt Moore||5/4||NH2|
|Lancaster||Bainbridge||G2SC,G3,G4,BMR||Don Risser||5/8||8/28, 9/6|
|Lancaster||Landisville||G3,G4, BMR||Penn State SE Ag Research||5/3||8/23, 8/27|
1. G0 = 85-94 day RM, G1 = 95-103 day RM, G2 = 99-110 day RM, G2SC = 99-110 day RM in South Central PA, G3 = 110-115 day RM, G4 = 116-119 day RM, BMR=114-115 day RM.
2. Not Harvested
2018 Grain Corn Hybrid Test Results
Data from 10 test locations across the state of Pennsylvania. These locations are chosen within 4 growing zones. Maturities across these zones range from 85 to 115 days relative maturity.
These reports provide individual grain yield results from each county or combined grain yield results from 3 to 4 locations.
Reports by Season
2018 Silage Corn Hybrid Reports
This corn hybrid evaluation for silage production is a collaborative effort by Penn State and the Professional Dairy Managers of Pennsylvania (PDMP). These locations are chosen within 4 growing zones. Maturities across these zones range from 85 to 119 days relative maturity.
Season and Location
Mid-season Silage in Late-season Area
Starch Digestibility Trial (4 hr In-Vitro Starch Digestibility, 1 mm grind)