xt72fq9q3k48 https://exploreuk.uky.edu/dips/xt72fq9q3k48/data/mets.xml   Kentucky Agricultural Experiment Station. 1969 journals 180 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.180 text Progress report (Kentucky Agricultural Experiment Station) n.180 1969 2014 true xt72fq9q3k48 section xt72fq9q3k48 V RESULTS QF; THE
I- KENTUCKY SORGO PERFORMANCE TEST
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1968
; BY J, F. SHANE
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4 Progress Report 180
* March 1969
` UNIVERSITY OF KENTUCKY
k AGRICULTURAL EXPERIMENT STATION
‘ Department of Agronomy
‘ Lexington
A

 I
RESULTS OF THE KENTUCKY SORGO
PERFORMANCE TEST — 1968
J. F. Shane ’
•
The objective of the Kentucky Sorgo Performance t
Test is to provide sorgo sirup producers with an esti~ `
mate of the relative performance of sorgo varieties. a
Varieties in the test include those being grown in the
Southeastern Region of the United States and several of *
the more promising experimental lines developed by the I
U, S, Department of Agriculture at Meridian, Miss. The
l968 test included eight varieties grown in a randomized
block design of five replications.
Stalk samples of all varieties tested in the South-
eastern Region are sent to Meridian, Miss., or to Cairo, -
Ga., for milling, juice analysis and sirup processing.
The sugar content of the juice and the amount that
can be extracted are two important characteristics of
sorgo varieties. The percentage of total soluble solids in .
the juice, most of which are sugar, is determined by using
a sugar hydrometer. Juice extraction at Meridian and
Cairo is considerably higher than that obtained by small __
mills.
Sirup of high quality should reach afinishing tempera— *
ture of l08OC (226OF) at usual altitudes in Kentucky. A __
standard finishing temperature at ll0OC (230OF) is used g
in processing sirup at Meridian. Difficulty in producing
an acceptable sirup might be encountered if this tempera- P
ture cannot be reached. The sirup is taken off when the
foam begins to roll and the temperature is more or less *
static. Raising the temperature higher would tend to _
scorch the sirup and produce a darker color.
Several varieties in the test were lightly infected
with mosaic, a virus disease similar to the maize dwarf ,
mosaic that has been reported in corn. Williams, Sugar
Drip, and three of the experimental lines exhibited some ’
stunting, probably associated with the disease. _
In addition to the varieties in the Kentucky Sorgo _
Performance Test, 26 experimental strains were
evaluated for mosaic as well as other agronomic _
2 •
I

 : Sorgo Variety Test, Robinson Substation, Quicksand, Ky. , 1968
-  
Simp Per* Stalk Weight Extrac- Lodg- Plant
Variety Ton Acre Total Stringed °B1·ix* tion* ing Height
Gal Gal Tons Tons % % In .
S
Wiley 15.9 318 23.9 20.0 18.0 52.6 2 135
‘ SugarDrip 10.7 165 20.8 15.5 13.3 52.2 0 100
_i Williams 12.4 184 20.0 14.9 14.1 50.4 61 90
Brandes 12.3 171 18.0 13.9 16.2 47.6 0 93
Mer 64-4 9.6 82 12.4 8.5 16.5 43.2 0 76
- Mer 64-12 14.6 249 21.6 17.0 19.8 46.8 O 105
Mer 65-1 8.0 73 11.5 9.2 11.5 49.8 0 85
"` Mer 66-14 14.0 248 21.8 17.7 18.8 48.6 0 110
gg LSD (0.05) 13.1 11.4 1.3 4.6
*See text for explanation
. . Sorgo Variety Test, Robinson Substation, Quicksand, Ky. , 1966-68
 
T Sirug Per* Stalk \/Veight Extrac- Plant
Variety Ton Acre Total Sixipged °Brix* tion* Height
Gal Gal Tons Tons % In .
*2
Wiley 16.0 323 I 25.3 20.6 19.3 52.1 129
3 SugarDri§ 12.6;/ 160;-/ 16.4 12.3 15.2 54.5 112
l Williams.! 14.31/ 1861/ 18.2 13.5 15.8 53.3 107
"° Brandes 14.2 229 21.5 16.0 16.3 52.1 94
Mer 64-12 16.1 287 22.2 17.9 19.4 51.6 111
G- *See text for explanation.
; é/Two-year average for sirup. Did not boil down to proper density in 1966.
—/Williams lodged badly - 58% average for 3 years.
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 characteristics. Forty plant introductions, selections, or M
experimental strains were evaluated at Frankfort for
resistance to mosaic. .
Entries were classified by plots on the basis of the ‘
percentage of the plants exhibiting mosaic and the *
severity of stunting. The entries ranged from 3 to 100 ,
percent plants infected and in severity of infection from ` V
no stunting to very severe stunting.  V
Brix - Percentage of total soluble solids, mostly
sugars, in the juice.
Sirup - Based on 76 percent sugar and 11.57 pounds •
of sirup per gallon. 1;
Extraction - The percentage of juice that was ex-
tracted from the stripped stalks. •
Data for the Sorgo Performance Tests for 1968 and
for 1966-68 are presented in the table on the preceding
page. Differences of less than the figure given as the
L,S,D, are not significant. ‘ _
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