Group Title: Mimeo report - Jay Agricultural Research Center ; WFES 71-4
Title: Corn silage and July-planted forage sorghum variety trials, 1971
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Permanent Link: http://ufdc.ufl.edu/UF00053564/00001
 Material Information
Title: Corn silage and July-planted forage sorghum variety trials, 1971
Series Title: Mimeo report
Physical Description: 6 leaves : ; 28 cm.
Language: English
Creator: Dunavin, Leonard Sypret, 1930-
Agricultural Research Center, Jay
Publisher: Agricultural Research Center
Place of Publication: Jay Fla
Publication Date: [1971]
 Subjects
Subject: Forage plants -- Varieties -- Florida   ( lcsh )
Corn -- Varieties -- Florida   ( lcsh )
Sorghum -- Varieties -- Florida   ( lcsh )
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: L.S. Dunavin.
General Note: Caption title.
General Note: "December, 1971."
 Record Information
Bibliographic ID: UF00053564
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 62301088

Full Text



AGRICULTURAL RESEARCH CENTER, JAY
t Jay, Florida 32565

MIMEO REPORT WFES 71-4 -December, 1971

Corn Silage and July-Planted Forage Sorghum Variety Trials, 1971

L. S. Dunavin

In 1971, variety trials were conducted with seven field corn and four sweet
corn varieties to evaluate them for silage. The field corns ee harvested at
three stages of maturity (milk, dough, and o fferences at these
stages. HUME ,lBE

The trials were located on a Red ay fine sandy loam soil. Six replications
were used. They were planted on March 1, 19 i PR or to plant ng, one ton per
acre of dolomitic limestone and 350 po ds per acre of 0-20-20 h d been disked into
the soil. One gallon of dinitro and on pint of 2,4-D p~~re applied for
weed control on April 5. Heptachlor wad.1 d "I pounds per acre
to control sugar cane beetles. The cor 1T k~'f1 30 and May 18. On
May 5, 300 pounds per acre of ammonium n ate was top dressed on the corn with
a bulk spreader.

The sweet corn varieties are not usually utilized for silage but these were
followed by forage sorghum in an attempt to determine the possibility of obtain-
ing a good total yield from two crops on the same area in one year. The forage
sorghum was planted on July 13. No pre-planting fertilizer was used. It was top-
dressed with 200 lbs. per acre of ammonium nitrate on September 3.

Tables 1, 2, and 3 present data from the milk, dough, and mature stages of
corn, respectively. As would be expected, grain yields increased with maturity.
Different varieties varied as to whether the largest amount of green forage was
produced at the milk or dough stages.

The crude protein content of shelled grain is indicated in Table 4.

Table 5 presents data from the sweet corn trial and data from forage sor-
ghums planted after the sweet corn was harvested is presented in Table 6.







Table 1


Corn Silage Trials
Harvested In The tlilk Stage

Agricultural Research Center
Jay, Florida
2 July 71


Green Forage
(Pounds/Acre)


Oven-dry Forage
(Pounds/Acre)


Oven-dry Grain*
(Pounds/Acre)


DeKalb XL389
Pioneer 3369A
Pioneer 3009
Funk G4761
Funk G4949
ARCJ-CP-OP**
McNair 440F


*Oven-dry shelled grain
**A test variety not commercially


Variety


Height
(Inches)


DeKalb XL389
Pioneer 3369A
Pioneer 3009
Funk G4761
Funk G4949
ARCJ-CP-OP
McNair 440F


available



Disease* Insects
(0-10) (0-10)


1.0
0.9
0.9
0.9
0.9
1.0
1.1


0.1
0.1
0.1
0.2
0.2
0.2
0.3


*0 = none; 10 = complete coverage (Southern corn blight was not observed)


Variety


Green-Weight Basis
% Ears* % Leaves % Stalk


Dry-Weight Basis
% Ears* % Leaves % Stalk


DeKalb XL389
Pioneer 3369A
Pioneer 3009
Funk G4761
Funk G4949
ARCJ-CP-OP
McNa4r 440F


*Includes cob and shuck


Variety


31,989
37,329
37,253
33,472
36,693
33,169
33,941


7357
9332
8941
7699
8439
7297
7806


1119
2374
1089
1016
709
414
787


Lodging
(%)

0.0
0.1
0.2
0.3
0.0
1.0
0.1







Table 2


Corn Silage Trials
Harvested In The Dough Stage (Dented)

Agricultural Research Center
Jay, Florida
13 July 71


Green Forage
(Pounds/Acre)


Oven-dry Forage
(Pounds/Acre)


Oven-dry Grain*
(Pounds/Acre)


DeKalb XL389
Pioneer 3369A
Pioneer 3009
Funk G4761
Funk G4949
ARCJ-CP-OP**
McNair 4409


*0ven-dry shelled grain
**A test variety not commercially


Disease*
(0-10)


DeKalb XL389
Pioneer 3369A
Pioneer 3009
Funk G4761
Funk G4949
ARCJ-CP-OP
McNair 440F


1.3
1.0
1.0
1.0
1.3
1.3
1.1


available



Insects
(0-10)


0.4
0.4
0.4
0.4
0.4
0.4
0.4


*0 = none; 10 = complete coverage (Southern corn blight was not observed)


Green-Weight Basis
% Ears* % Leaves % Stalk


Dry-Weight Basis
% Ears* % Leaves % Stalk


DeKalb XL389
Pioneer 3369A
Pioneer 3009
Funk G4761
Funk G4949
ARCJ-CP-OP
McNair 440F


34,682
34,530
38,448
32,080
36,376
36,421
28,889


11,098
11,395
12,688
10,266
10,549
10,198
9,533


3208
4184
3497
3210
2206
1481
2336


Lodging
(%)


0.0
0.1
0.2
0.3
0.1
1.0
0.3


Variety


Variety


Variety







Table 3


Corn Silage Trials
Harvested In The Mature Stage


Agricultural
Jay,
25


Field-Mature Forage
(Pounds/Acre)


Research Center
Florida
Aug 71

Oven-dry Forage
(Pounds/Acre)


Oven-dry Grain*
(Pounds/Acre)


DeKalb XL 389 22,279
Pioneer 3369 A 16,501
Pioneer 3009 19,194
Funk G 4761 14,490
Funk G 4949 21,780
ARCJ-CP-OP** 18,453
McNair 440 F 16,259

*Oven-dry shelled grain
**A test variety not commercially available



Variety Insects
(0-10)

DeKalb XL 389 0.5
Pioneer 3369 A 0.5
Pioneer 3009 0.5
Funk G 4761 0.5
Funk G 4949 0.5
ARCJ-CP-OP 0.5
McNair 440 F 0.5


Variety


Field-M*ture-Weight Basis
% Ears* % Leaves % Stalk


Oven-dry Weight Basis
% Ears* % Leaves % Stalk


DeKalb XL 389
Pioneer 3369 A
Pioneer 3009
Funk G 4761
Funk G 4949
ARCJ-CP-OP
McNair 440 F


Variety


12,476
10,891
11,708
8,984
11,979
10,887
9,755


6,209
5,838
5,652
4,555
5,347
4,076
4,433


Lodging
(%)

0.2
0.3
1.7
1.2
7.0
4.2
3.3







Table 4


% Crude Protein Content of Oven-dry Shelled Grain
Corn Silage Trials

Agricultural Research Center
Jay, Florida

1971

Maturity Stage at Harvest
Variety Milk Dough Mature

DeKalb XL 389 11.0 10.2 10.7
Pioneer 3369 A 10.8 10.6 10.1
Pioneer 3009 14.7 9.8 10.0
Funk G 4761 13.2 11.3 10.7
Funk G 4949 14.8 11.6 9.8
ARCJ-CP-OP** 17.2 13.3 11.4
McNair 440F 12.9 10.9 10.6

**A test variety not commercially available



Sween Corn Varieties Dough Stage

Table joy 14.8
Golden cross bantam 14.6
Calumet 14.0
Stowell's evergreen 14.0







Table 5


Corn Silage Trials
Sweet Corn Varieties

Agricultural Research Center
Jay, Florida
2 July 71


Green Forage
(Pounds/Acre)


Oven-dry Forage
(Pounds/Acre)


Oven-dry Grain*
(Pounds/Acre)


Table Joy
Golden Cross Bantam
Calumet
Stowell's Evergreen

*Oven-dry shelled grain



Variety


Table Joy
Golden Cross Bantam
Calumet
Stowell's Evergreen


25,486
19,889
24,729
24,427


Height
(Inches)


Maturity


Dough
Dough
Dough
Early dough


Variety


Green-Weight-Basis
% Ears** % Leaves % Stalk


Dry-Weight-Basis
% Ears** % Leaves % Stalk


Table Joy
Golden Cross Bantam
Calumet
Stowell's Evergreen

**Includes cob and shuck


NOTE: Following harvest of this silage, the area was planted to forage sorghum for
a second silage harvest.


Variety


7136
5768
6677
5862


1987
2241
2534
1570


Disease
(0-10)


1.8
1.8
1.1
1.3


Insects
(0-10)


0.1
0.1
0.2
0.0


Lodging
(%)


0.3
0.5
0.0
0.3







Table 6


Sorghum Silage Variety Trial
Planted 13 July 71 Following Sweet Corn
Agricultural Research Center
Jay, Florida


Total Green Forage
Pounds Per Acre
26,408
21,689
25,592
25,501


Total Dry Forage
Pounds Per Acre
7,130
6,507
7,422
7,650


Oven-dry Grain
Pounds Per Acre
1,996
2,082
2,672
2,754


Maturity


Dough
Dough
Dough
Dough


Disease at
Heading (0-10)

2.0
2.0
2.0
1.5


Green
% Heads*
15
23
22
22


Height
(Inches)
104
78
85
88


Lodged
(%)
2
2
7
3


Disease at
Harvest (0-10)

6
5
5
4


Weight Basis
% Leaves % Stalk
5 80
8 69
8 70
9 69


Date
Headed
29 Sept
1 Oct
1 Oct
3 Oct

Insect
Damage
(0-10)
0.4
0.1
0.0
0.0


Date
Harvested
8 Nov
8 Nov
8 Nov
8 Nov


Bird
Damage
(0-10)
0
0
0
0


Dry Weight Basis
% Heads* % Leaves % Stalk
35 8 57
41 15 44
44 14 42
42 16 44


*Includes rachis


Entry

R-P 55F
TDN
FS-24
102F


Entry


R-P 55F
TDN
FS-24
102F


Entry


R-P 55F
TDN
FS-24
102F

Entry

R-P 55F
TDN
FS-24
102F




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