xt7dr785k56z https://exploreuk.uky.edu/dips/xt7dr785k56z/data/mets.xml   Kentucky Agricultural Experiment Station. 1960 journals 097 English Lexington : Agricultural Experiment Station, University of Kentucky Contact the Special Collections Research Center for information regarding rights and use of this collection. Kentucky Agricultural Experiment Station Progress report (Kentucky Agricultural Experiment Station) n.97 text Progress report (Kentucky Agricultural Experiment Station) n.97 1960 2014 true xt7dr785k56z section xt7dr785k56z RESULTS OF THE KENTUCKY
HYBRID POPCORN PERFORMANCE
TRIALS - 1960
By J. F. Shane, F. A. Loeffel, and H. R. Richards
l Progress Report 97
A (Filing Code; 1-1)
February 1961
UNIVERSITY OF KENTUCKY
AGRICULTURAL EXPERHVIENT STATION
DEPARTMENT OF AGRONOMY
LEXINGTON

 
 -3..
RESULTS OF THE KENTUCKY HYBRID POPCORN
PERFORMANCE TRAILS - 1960
By J. F. Shane, F. A. Loeffel, and H. R. Richards
Kentucky ranked third in popcorn acreage in 1960, following Indiana and Illinois.
The value of the crop was in excess of $1, 000, 000, compared with $812, 000 in 1959
and $1,414, 000 in 1958.
Popcorn hybrids devel.oped in the breeding programs at the Indiana, Iowa, Kansas,
and Nebraska agricultural. experiment stations are included in the evaluation studies in
Kentucky. Land is made available for these studies by Orrin Hull of Murray State
College, Murray, Ky. , and Murray Wall, Hopkinsville, Ky. Their assistance and
interest is appreciated and acknowledged.
One-, two- and three-year summaries of these tests are presented in tables 1-3.
The results from the individual. locations grown in 1960 are summarized in tables 4 and 5.
The average yield per acre of the 36 hybrids grown at Hopkinsville and Murray in 1960
was 4, 268 pounds of ear corn and 3, 519 pounds of ear corn, respectively.
On the basis of three-year testing data in Kentucky, P303 continued to be the best
1 performing white hybrid. KP1101, a yellow hybrid from Kansas, was superior to P32
in yielding ability and standing ability and should be of interest to Kentucky producers.
Two Purdue experimental yellow hybrids, 83249 and 731160 were superior to P32 in
yielding ability and equal in standing ability. P406A was superior to P32 in standing
ability but yielded somewhat lower, whereas P410 was inferior to P32 in standing
ability but yielded somewhat more. The performance of P32 and P632 was comparable
for the three—year testing period, although P32 was definitely superior in yielding
ability in 1960.
Experimental Procedures
Field Design
Each hybrid was planted in four plots at each of the two locations, with individu-
al plots being two hills wide and five hills long. These plots were located in different
parts of the testing field to minimize cultural and soil. differences.
Yield
The corn from ea.ch plot was harvested and weighed individually. The yield of
the hybrids was determined and is reported on the basis of pounds of ear corn per
acre with a moisture content of 13. 5 percent. Adjustments were made also for missing
hills but not for other variation in stand. Therefore, the yields at each location re-·
ported in this report constitute an average yield of the four plots after all adjustments
were made.

 -4- _
Moisture
The moisture content at harvest is the best measure of relative maturity of
hybrids. One hybrid may be considered to be earlier than a second hybrid if its
moisture content at harvest is consistently lower. Maturity thus determined is not
absolute but is relative to the hybrids being compared.
E The moisture in the grain of individual hybrids was determined at harvest by
removing two rows of kernels from each of eight ears selected at random. from each
of the first three replications. The grain from the 24 ears was thoroughly mixed, and
the moisture content of a 150-gram sample was determined with a Steinlite moisture
meter.
Root Lodging
Plants which lean from the base of an angle of more than 30 degrees from the
vertical are considered to be root-lodged. This character is expressed as a. percentage
which is obtained by counting the number of root—l.odged plants and dividing by the number
of plants present.
Stalk Lodging
A plant is considered to be stalk-lodged when the stalk is broken between the ear- l
bea.ring node and ground level. This attribute is computed in a manner similar to that
indicated for root lodging.,
liar Height
Ear height, distance from the base of the plant to the point of attachment of the
upper ear, was measured visually using a scale with one·foot intervals. Visual. ratings
were made cn four plots of each hybrid at ea.ch location.
Stand
All tests are planted at the rate of five kernels per hill and the resulting plants
thinned to three per hill. The sta.nd percentage was computed on the basis of the total
plants present divided by the number of plants which would have been present if all
had survived.
Diseases
Disease ratings were made visually on a plot basis, using a scale of 1-5 with
1 being resistant. This rating measures relative resistance to Southern and Stewartls
Leaf Blight diseases.
Ear Appearanc;
Visual ratings of ear appearance were recorded at each location in 1958. A
five—class rating scale was used. with the l.ower numbers representing the better
appearing ears.

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