Tolerance to stalk cannibalization indicates a corn hybrid’s capacity not to exhaust its stalk reserves when it lacks nitrogen during a long season. Cannibalization empties the inside of stalks, resulting in greater vulnerability to lodging.
Corn heat units.
Hybrids of similar maturity are compared according to their moisture loss during in-field drying. A rating of 1 indicates a slow drying rate, while 9 indicates a very rapid drying rate.
A rating of 9 indicates that the husks are longer than the ears.
- VF = Very Flint
- F = Flint
- SF = Semi-flint
- VD = Very Dent
- D = Dent
- SD = Semi-dent
Milk yield per acre based on 100% dry matter.
Net energy lactation.
- S = Short
- MS = Medium/Short
- M = Medium
- MT = Medium/Tall
- T = Tall
- VT = Very Tall
- 9 = Excellent
- 5 = Average
- 1 = Poor
- R = Resistant
- T = Tolerant
- S = Susceptible
- - = Not rated
See below for information on Insect Resistance Management.
In the absence of an industry-standardized maturity rating, relative maturity can be used to compare hybrids of similar maturity and moisture at harvest. An early-maturing variety will have a lower number while later-maturing varieties will have a higher number.
A higher number rating indicates greater root strength.
Ratings are set during the 3 to 5 leaf stage.
The quality of a stalk refers to its resistance to lodging due to factors such as stalk rot. A higher rating indicates greater stalk quality.
A higher rating reflects the hybrid’s capacity to produce adequate yields under difficult conditions, such as
a colder season, compaction, or a field with a lower yield potential.
A higher rating indicates a higher test weight.