Title: Horticultural trials with sweet corn hybrids.
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 Material Information
Title: Horticultural trials with sweet corn hybrids.
Physical Description: Serial
Language: English
Creator: Guzman, V. L.
Publisher: Everglades Research Station, University of Florida
Place of Publication: Belle Glade, Fla.
Publication Date: 1963
 Notes
General Note: Everglades Station mimeo report 63-12
 Record Information
Bibliographic ID: UF00076912
Volume ID: VID00005
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.

Full Text




Everglades Station Mimeo Report 63-12


HORTICULTURAL TRIALS WITH SWEET CORN HYBRIDS

V. L. Guzman


Two types of tests were conducted: 1, observational and 2, replicated.
The observational trial or screening stage serves to eliminate those varieties
which offer no possibility for the fresh market due to poor horticultural char-
acteristics or susceptibility to blight. The most promising lines of the obser-
vational trials are elevated to the replicated tests for further study. In these,
varieties are tested in special designs and a reliable measure of their charac-
teristics is treated statistically.

Special conditions

March 7 9 was cold, resulting in severe damage to the corn trials. The
yellow sweet corn was completely lost, but the white sweet corn (just emerging
from the soil) was spared from major injury. For the second planting of the
yellow sweet corn on March 13, there was not enough seed of a few of the hybrids;
consequently, some of the original entries are missing in the tables. For most
of the growing season, temperatures were slightly above normal and precipitation
low. Water was not deficient, however, as it was adequately supplied by sub-
irrigation. The experiment was conducted in a parcel within a field of 107
sweet corn in which no provision for blight control had been made. Therefore,
all the yellow sweet corn hybrids were subjected to severe blight conditions
and a good reading of their susceptibility to the disease was obtained.

Location, planting and harvest dates.

Horticulture experiment 463 and 463A Spring yellow sweet corn replicated
and observational trials respectively were seeded March 13, 1962 at Duda and
Sons Farm, field 18, Belle Glade and harvested May 24 to June 2, 1962, depending
on the earliness of the variety.

Horticulture experiment 464 Spring white sweet corn replicated trials -
was seeded February 27, 1962 at Duda and Sons Farm, Field WR 3, and harvested
May 21, 1962.

Field plot technique.

Plots were single rows 40 feet long in rows 34 ahesq part. Three to 4
seeds were dropped in hills 8 inches apart. When e plantsw're 6-8 inches
high, they were thinned to one plant per hill by ut g out extra plants at
ground level. Only 30 feet of each row were ha e te 4or yield\ In the repli-
cated experiment, randomized blocks with five t sx repay action ere employed
respectively for the yellow and white sweet corn/

Fertility conditions.

Soil analysis for experiments 463 and 463A showed -a erage pH of 6.2 and
2 pounds of soluble phosphorus and 34 of potassium. This virgin land had been
cropped to cabbage before seeding the corn. The field for the white sweet corn
had been cropped to celery and corn during the past season. The grower cooperator


January, 1963








-2-


applied broadcast sufficient fertilizer to supply the need in major and minor
elements of the crop.

Control of weeds, diseases and insects.

Four mechanical cultivations eliminated most of the weeds. In addition,
one hand weeding was necessary in experiment 464. Corn stem weevil was con-
trolled by the use of 4 pounds of 40% toxaphene and 1 pint of emulsifiable
parathion in 100 gallons of water. Two quarts of nabam plus 3/4 pounds of
zinc sulfate or 1t pounds of Manzate in 100 gallons of water controlled leaf
blight. In experiments 463 and 463A no attempt was made to control leaf blight.

Results and discussion.

Tables 1 to 3 present tabulated data on performance of the varieties in
these tests.

Data obtained

Yield data

I Total weight of fresh ears.
II Weight in pounds of U. S. Fancy and U. S. No. 1.
III Number of U. S. Fancy and No. 1 ears, and estimated crates per acre.
IV Weight in pounds of U. S. No. 2 ears.
V Number of U. S. No. 2 ears.
VI Percent U. S. Fancy ears.

Growth characteristics

VII Days to reach maturity.
VIII Flag length.
IX Husk color.
X Husk over tip.
XI Ear length.
XII Ear diameter.
XIII Unfilled ear tip.
XIV Number of rows.

Other observations

XV Number of plants harvested and estimated number of marketable ears
per plant.
XVI Taste (raw ear).
XVII Appearance of husked ear.







Key for Hybrid Sweet Corn Tables

Source of seed: Name of company or individual supplying the seed: ASG Asgrow
Seed, Milford, Conn.; Cor. Corneli Seed Co., St. Louis 2, Mo.; Cro. Crookham
Company, Caldwell, Idaho; EES. Everglades Experiment Station (Wolf), Belle
Glade, Florida; F.M. Ferry Morse Seed Co., Salinas, California; J.H. Joseph
Harris Seed Co., Rochester, N.Y.; Rob Robson Seed Farms, Hall, N.Y.; Rog -
Rogers Bros. Seed Co., Caldwell, Idaho. SRS Seed Research Specialists Gilroy,
Calif,; Hol Holmes Seed Co., Canton, Ohio.

Days to maturity: Number of days from planting to harvest estimated by examining
10 ears and determining the day when the majority will reach optimum market
maturity.

Husk over ear: Approximate length of the husk over the tip of the ear. A 1-
indicates that the husk is shorter than one inch. 1+ indicates the husk is longer
than one inch

Flag length: Estimated as mean flag length of 10 ears. L = longer than 6". M =
between 3" and 6". S = short less than 3".

Husk color: Based on intensity of green color. D = dark green; M-D = medium
dark green; M = medium green; L-M = light to medium green; L = light green.

Ear length (inches): Mean ear length of 10 randomly selected marketable husked
ears per variety and replication.

Ear diameter (cm): Mean ear diameter of 10 husked ears, measured about 2.5 inches
from the butt ear per variety and replication.

Unfilled ear tip (inches): Mean length of unfilled tip of 10 randomly selected
marketable ears per plot.

Number of row (majority): Number of row of 10 randomly selected ears and reported
as a majority number.

Number of plants harvested: Number of plants producing ears in a 30 foot row.
Total number of U.S. Fancy and #1 ears
Marketable number of ears per plant: Number of plants harvested

Blight index: Helminthosporium turcicum leaf blight rating on unsprayed plants.
Zero no blight, 5 severe blight (E. A. Wolf)

Percentage U. S. Fancy ears: Number of U. S. Fancies in a 10 ear sample taken
at random from the marketable ear class per variety and replication, reported as
percent.

Tons per acre: Estimated from the total weight of U. S. Fancy and No. 1 ears.

Taste: One man's opinion on eatability of the ears judged from the taste of raw
fresh kernels. P = poor; F = fair and G = good.

Appearance: One man's opinion on the husked looks of the ears. P = poor; F =
fair and G = good.
The plus (+) indicates slightly superior rating. The minus sign (-) indicates
slightly inferior rating.







The first yellow sweet corn replicated trials, seeded February 14, were
badly injured by the freeze on March 7 9. It was noted, however, that variety
5-C85a from the Everglades Experiment Station withstood better the effect of the
freeze. For the second planting, seed of varieties 5-C85a and 12 -XP 277 were
not available.

Yields of marketable ears did not differ significantly among the hybrids in
the replicated trials. Except for hybrid 106, which had a slightly better appear-
ance than the check, no other hybrid was found to be outstanding. The following
hybrids will be tested again in replicated trials since they showed some potential
for fresh market, although they were not better than 107 (check): 4-832, 6-
Floribelle, 10-Cr 988-17, 11-Seneca M10 and 14 Southern Belle.

Main reasons for dropping other hybrids from the replicated test were as
follows: 3- Florida 61 for low tolerance to blight, too many suckers and silk
retention between kernel rows. Hybrid 7-Staygreen for plants being too tall,
long ears and shanks, small flags and long unfilled ear tips. Hybrid 8-R-81D
for poor ear appearance and long unfilled ear tips. Hybrid 9-R-89 for low blight
tolerance, long unfilled ear tips and poor ear appearance. Hybrid 13-XP 280 for
its tendency to lodge, low tolerance to leaf blight, short ears with long un-
filled tips.

In experiment 464-white sweet corn trials-hybrid 17-Silver Queen was out-
standing for yield and appearance as compared with hybrid 15-Silverliner.
Hybrids 18-R-804 and 19-R-901 produced remarkably high yields, but their appear-
ance and quality were not as good as those of Silver Queen. The latter hybrid
has proved to be highly productive and of excellent appearance and taste, but
unfortunately quite susceptible to leaf blight.

In the observational trials, no variety had the good appearance of 107
(check) except hybrid 106-A. The following hybrids are to be considered for the
replicated trials: 4l-MK-14, 56-Cr 101-36, 68-D51, 93-R 795/61, 99-Honey Gold
and 102-106A.




















0ES 63-c
300 copies









Table 1. Exp. 463. Yellow Sweet Corn Variety Trials Conducted on the Farm of A. Duda and Sons,
Belle Glade. Spring 1962. Harvested May 24 June 1, 1962.
-


Varieties I I I I I I I__ I I I I I I I- I I -1


1. 107
2. 106
3. Fla. 61
4. 832
6. Floribelle
7. Staygreen
8. R-81-D
9. R-89
10. Cr988-17
11. Seneca M-10
13. xP 280
14. Southern Belle

LSD .05
LSD .01


FM
FiI
Rob
J.H.
SRS
SRS
Rog
Rog
Cro
Rob
Asg

J.H.


M-D
D
M-D
D
D
M
D
P
M-D
D
M-D

D


7.68
7.88
7.62
8.14
7.20
8.94
7.74
7.48
8.54
8.24
6.96

8.46
0.27
0.36


4.12
4.30
4.32
4.48
4.78
4.32
4.46
4.12
4.16
4.32
4.36

4.34
O.
0.03
0.04


0.10
0.08
0.70
0.16
0.34
0.64
0.50
0.70
0.16
0.30
0.54

0.12
0.18
0.24


1.00
1.12
1.05
1.00
1.11
0.97
0.98
1.34
1.05
0.94
1.58

1.02


3.0
2.5
3.5
2.0
2.5
2.5
2.5
4.5
2.0
3.5
3.5

2.0


41
37
43
36
39
38
42
47
39
30
49

43
9.3
12.1


352
313
367
307
336
328
362
401
331
259
415

367
45
61


96
94
80
86
80
70
82
72
86
88
80

92
8
10


6.55
6.66
7.52
6.42
6.97
7.84
7.74
6.91
6.46
5.44
7.95

8.06


G
G
F
F
F
F-


- --















Table 2. Exp. No. 464. White Sweet Corn Hybrid Replicated Trial. Grown on the Farm of A. Duda and Sons,


Belle Glade.


Harvested May 21-23, 1962.


Varieties


.81
0




4*)o
to


go
ci
m
*it

P)
H



H
*r
a
a


'0

H


I
Is




Ut


Chat
I
,0


ci
1
4
H

a




^4


S0


P)
P4




P4

4
(3 (


) 0




4'

mP 0
FAN


15. Silverliner Cor 7.93 4.48 3.0 0.83 35 33 8.94 22.7 90 277 5.82 70
16. KVF 60-11 Cor 7.93 4.75 2.5 0.58 34 33 0.97 25.6 90 282 6.55 80
17. Silver Queen Rog 7.41 4.53 2.8 0.21 45 38 0.84 28.2 92 326 7.22 96
18. R-804 Rog 7.95 4.75 2.5 0.75 40 41 1.00 33.1 90 348 8.48 81
19. r-901 Rog 8.26 4.71 2.8 0.50 40 40 1.00 32.6 91 337 8.34 79


I









Observational Trials of Yellow Hybrid Sweet Corn Conducted at A. Duda & Sons


Farm, Belle Glade. Spring 1962. Harvested May 24 to June 1, 1962.



W (D r +


a) ) a o
to o a o5







20. Duet(XP 1137) Asg 3-5 24.5 38 22.2 3 325 90 41 4.2 7.3 0.2 L 1 D 14 F+ F+
S2 3 90 3 0 8 0 + D 1 F

22. P 5 Asg .5 25.2 35 2 0 2 322 80 38 .5 7.3 0.6 L 1 D 16 F+

2. ? 52 As 5.0 26.5 39 26.5 333 90 39 4.6 8.5 0.4 1 F F+
Vait -- -Q -P k k





25. D 55et(XP 1137) Asg 3.5 26.5 38 26.5 3 325 80 4138 4.3 7.6 0.2 M 1 D 16 F F
26. Meri5 Asg 4. 26.0 3 26.0 0 33316 90 39 5.0 8.4 0.2 L 1+ D 18 F F
27. 178 Asg 5.0 25.2 38 25.0 0 325 80 38 4.5 7.3 0.6 L 1 D 16 F+ p
28. 50 Asg 4.50 29. 41 29.0 o 350 80 37 4.34 8. 0.5 L 1- 14 F+ F+


29. XP 223 Asg 5.0 26.5 30.5 4 26.5 0 30.2 342 80 39 4.6 8.2 0.4 L 1 MJ 14 F F
23. P 88 Asg 32. 26.5 34 267. 0 325 80 38 4.3 78. 0.2 M 1+ D 16 F F
20. Due(XP Asg 3.5 24.0 38 22.0 0 325 90 38 4.2 7.7 0.2 L 1 D 14 F F+
32. ri0- 7 Asg 4.5 297. 34 23.5 0 359 80 43 4.0 7.4 0.4 L 1+- D 16 F+ F
22. P 562 Asg 4.5 23.2 35. 2. 0 530 80 63 4.5 7.3 01. L 1 M 16 F+ F
34. -32653 Asg 3.5 34.5 40 3.0 6 342 80 37 4.3 8.7 0.3 L 1- D 16 F+
24. 1 52 Asg 5.0 26.5 39 26.5 0 333 90 39 4.6 8.5 0.4 L+I 1- DI 14 F F+
25. P 55 Asg 3.5 26.5 38 26.5 0 325 80 38 4.3 7.6 0.2 M 1 D 16 F F


26. 6p-2397 51 Asg 4.0 26.0 342 26.0 0 3159 90 37 4.1 7.8 0.2 L+ 1+ D 14 F F




35. 61-2428 Rog 3.5 28.7 38 25.8 6 325 70 33 4.3 7.0 1.0 L 1+ D 12 F F-
36. 60-2427 Rog 5.0 19.7 33 18.5 1 282 50 37 4.3 7.2 0.6 L+ 1 D 16 F F-
37. Golden Dividend Rog 4.5 29.5 49 29.5 0 419 90 49 4.1 7.0 0.1 M 1+ M 16 F+ F+
38. MK-l2 Rob 4.0 29.5 45 29.5 0 384 45 4.2 7.5 0.5 L 1 D 14 F+ F
39. MK-12(white silk) Rob 3.5 24.0 38 23.2 2 325 60 32 4.3 7.3 0.7 L+ 1+ D 14 F F-
40. MK-12 Rob 3.0 20.0 28 18.5 0 239 90 32 4.4 8.7 0.3 L 1+ D 12 F+ F+


Table 3. Exp. No. 463a.









Table 3 continued)


S3 "D C 0


H 0 k w0
P 4

r o a W - 0
0 0; U 0 4 W 0 P H $4
3 MK-3 Rob 4.0 o 4
S2 S 22. 2 322 6 0 d3.3 7.3 0H 1+ -
*r.k bD Cd A 'I (O +> D -P o
o 4 a 35 2 43 28.0 8 37 o aS
Variety,
41. K2019-14 Rob 4.0 5 39 27.5 0 333 90 39 463 8. 0.2 L+ 1 D 16 F-; F+
42. Seneca Wamumgold Rob 4.0 27.0 33 2305 1 7 4 282 70 37 4.3 7.2 0.9 L+ 1+- D 12 F F-
43. -Valley old3 Rob 4.0
44. New 2067 SRS 4.5 22.0 35 21.2 2 322 60 34 4.3 7.3 0.8 L++ 1+ 14 F
45. Staygold SRS 3.5 31.2 43 28.0 8 367 70 36 4.2 7.2 0.9 L 1+ 1 16 F+ F:-
46. 2019-1 SRS 4.5 31.2 40 31.2 0 342 70 4o 4.6 7.8 0. L 1 D 16 F F
47. Fresh gold SRS 2.5 31.5 52 30.5 1 444 60 37 4.1 7.6 0.8 L 1i m 16 F P
48. Valley gold SRS 2.5 31.2 49 28.7 3 419 80 39 4.0 7.5 1.0 M 1 m 14 F+ F
49. 2068-1 SRS 4.0 23.5 35 22.5 3 322 60 39 4.1 7.6 0.7 L+ 1 D 14 F F
50. 2072-1 RS 3..0 26.5 38 26.5 0 325 90 38 4.4 8.5 0.3 L+ 1- D 16 F F-
51. 2070-1 SRS 4.0 30.7 40 29.2 3 342 70 45 4.7 77 0.7 1 1+ D 16 F F
52. 2018-1 SRS 4.0 28.0 42 25.7 3 359 70 43 4.1 7.4 1.0 L+ +1-;- D 16 F P
53. 2073-1 SRS 4.0 25.5 31 23.2 6 265 70 36 4.6 7.6 0.5 L 1 D 16 F F
54. 2074-1 SRS 3.5 31.0 41 31.0 0 350 60 41 4.9 8.0 1.1 1+ 1i 16 F F
55. 2049-1 SRS 4.0 36.7 52 35.7 1 444 80 46 4.1 7.8 1.1 L 1+ D 14 F F
56. Cr 101-36 Cro 3.5 33.7 41 33.7 0 350 80 41 4.7 7.5 0.3 L 1+ D 18 F F+
57. Cr 100-37 Cro 3.0 30.2 42 30.2 0 359 90 42 4.1 7.7 0.8 L 1 M 12 F+ F
58. Cr 101-35 Cro 4.5 24.5 35 24.5 o 322 90 35 4.6 7.6 0.5 Mi 1- P 14 F F+
59. Cr 101-52 Cro 3.0 30.2 43 29.0 0 367 80 42 4.4 7.7 0.7 M 1++ M 12 F+ F
60. KVF 60-93 Cor 4.5 31.5 40 28.5 6 342 80 36 4.4 8.4 0.9 L 1+ D 16 F F









Table 3. (continued)


H 0

t oto $4

o o 1 P d o r *
o w a a) Co H $ H o P
SVariety
35 35 30 o 3 4 + D 16 F+
S33. 3 3 1 M + D 1 F
40 5 400 0 4 0 0







72 1B F.H. 35 19.2 39 19. 33 80 39 3.8 8.0 0. L D 14 F F
SF.. 3.0 9 3 1 16 F F+







76. 136B F.M. 3.0 21. 33 21.0 0 28 90 33 3.9 8.5 L + M 14 F F
o 4 +-' lO 3 Co QP 4-) Qr VA H- )


Variety __ - R P_ _
61. KF61- Cor 4.0 289. 40 28.5 2 352 80 41 3.4 8. 0. L 1-1- D 16 F F
62. KVF 60-24 Cor 4o0 26..0 43 26.0 0 367 70 43 4.7 7.2 1.2 L 1 m 16 F -
63. KVF 60-1334 Cor 5.0 26.0 45 24.0 4 384 80 11 4.1 7.0 1.0 L 1 P 14 F+ -
64. D 1111 J.H. 4.0 33.0 59 31.5 3 58 70 39 3.8 7.0 1.1 L 1 D 12 F F
65. B 1631 J.H. .5 32.5 44 32.0 o 376 95 41 4.5 8.5 0. L 1+ D 16 F+ F
66. B 1811 J.H. 3.0 31.5 41 33.5 1 350 90 38 4.2 7.4 0.1 1+ D 14 F F+
67. D 31 J.H. 1.5 42.5 51 38.5 5 461 50- 41 3.9 8.5 1.5 L- 1+ D 12 F F
68. D 51 J.H. 1.5 41.0 53 o0.o0 0 453 90 38 4.5 8.6 o.1 m' 1 D 14 F- +
69. P 1151 J.H. 3.0
70. B 51 J.H. 3.0 26.5 41 26.5 0 376 0go. 44 4.2 7.5 0.3 L 1 D 14 F t F

71. 128B F.M. 4.0 25.2 34 22.5 6 290 70 32 4.0 8.5 0.5 L++ 1- D 14 F F-
72. 131B F.H1. 3.5 19.2: 39 19.2 0 333 80 39 3.8 8.0 0.3 L 1- D 14 F F
73. 132B F.M. 3.0 26.0 38 25.7 0 325 90 35 3.9 8.0 0.2 L+ 1 D 16 F F+
74. 124B F.M. 3.5
75. 135B F.M. 4.0 26.2 39 25.5 1 333 90 39 3.7 8.2 0.3 L 1 D 14 F F+
76. 136B F.M. 3.0 21.0 33 21.0 0 282 90 33 3.9 8.5 0.1 L 1+ m 14 F F
77. 138B F.M. 3.0 29.0 42 28.7 0 359 70 41 3.8 8.0 0.5 L 1- D 12 F F
78. 143B F.M. 4.0 27.0 33 23.0 8 282 70 39 3.8 7.7 0.1 L++ 1-- D 12 F F
79. 164c F.M. 5.0 25.2 38 25.2 0 325 80 38 4.3 7.2 0.9 L 1+ D 14 F- F
80. 165C F.M. 5.0 19.0 27 17.5 0 231 90 30 4.4 7.5 0.3 L 1 D 16 F+ F+
___1__1_1____I__II I f -













Table 3. (continued)


0

to
0
$4
0
CO


Variety __. I


166c
176c
178E
179E
181E
R 160/61
R 161/61
i< 169/61
R 179/61
R 180/61
R 181/61
R 189/61
R 795/61


F.M.
F.M.
F.M.
F.M.
F.M.
F.M.
F.M.
F.H.
F.PM.
F.M.
F.M.
F.M.


4.5
4.0
2.5
2.5
3.0
3.5
4.0
4.0
4.0
:4.5
3.0
3.5
3.0


rf
-4


M


47
0
O


h
Io
0
(D


4-1

>-)
0
P


21.5
17.5
27.5
33.0
31.7
21.5
29.0
24.5

26.5
15.7
31.5
24.2


0








I
U



0d
'r
I 4


4.3
4.1
4.5
4.6
4.7
4.5
4.7
4.6

4.6
4.5
4.6
4.6


-P


21.0
17.5
23.5
30.5
30.5
21.0
27.5
23.5

25.5
15.0
31.2
24.2


322
256
273
325
359
290
359
290

316
188
342
308


70
90
60
90
70
70
70
80

90
60
80
100


7.3
7.4
7.0
7.1
7.2
7.4
7.2
7.8

7.5
7.8
7.8
7.:8


0.4
0.2
1.0
0.3
0.6
0.7
0.6
0.2

0.3
0.5
0.3
0.1


1


-r













Table 3. (continued)



to ( D












97. 6256 F.M. 1.5 33.5 39 29.5 6 333 70 46 4.5 7-7 -7 L i+ D 12 F F
98. 60-1 F.M. 3.5











99. Honey Gold Hol 3.0 23.2 41 w3.2 0 $50 90 39 4.0 7w7 .2 M i- D 12 F+ F
a1. G n Suriy Ag C3 5
0 m r4 D $
rd 9 0-












102. 106-A F.M. 2.0 28.0 38 27.5 0 325 90 39 4. 7.8 .2 L 1 D 16 F+ O
6. 333 EES .5 3 .5 333 39 3.9 .5 L+ + D 1 F F-


S60 40 0 5 0 7 1 D 14 F F
Variety
94. R R 226/61 F.M. 2.5
95. 60-42B F.M. 3.5
96. 6799 F.M. 3.5


99. Honey Gold Hol 3.0 23.2 41 23.2 0 350 90 39 4.0 7.7 .2 1- D 12 F+ F
100. Lclipse Inip. Hol 4.0 27.2 37 25.5 3 316 70 36 4.2 7.2 .6 L 1 ID 14 F+ F
101. Golden Security Asg 4.5
102. 106-A F.M. 2.0 28.0 38 27.5 0 325 90 39 4.2 7.8 .2 L 1 D 16 F+ G
105. C332 EES 2.5 33.2 44 33-0 1 376 80 37 4.3 7.8 .4 L--. I D l4 F+ F
106. C333 EES 2.0 29.5 39 29.5 0 333 70 39 3.9 7.0 .5 L+ 1+ D 14 F F-
108. C335 EES 2.0 42.2 60 42.0 0 513 70 4o 0 4.2 7.8 .7 L++ 1 D 4 F F
111. 338 EES 2.0 41.5 54 38.0 4 461 80 39 4.1 7.5 .5 L++ 1+ D 16 F F-
112. C339 EES 2.0 24.5 42 22.0 3359 60 43 3.8 6.8 .7 L++ 1+ D 12 F F-




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