Group Title: ARC research report - Jay Agricultural Research Center ; WF73-6
Title: Sorghum silage following corn and as a single crop harvested twice
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Permanent Link: http://ufdc.ufl.edu/UF00053549/00001
 Material Information
Title: Sorghum silage following corn and as a single crop harvested twice
Series Title: Jay, ARC research report
Physical Description: 5 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: [1973]
 Subjects
Subject: Silage -- Florida   ( lcsh )
Sorghum -- Florida   ( lcsh )
Corn -- 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, 1973."
 Record Information
Bibliographic ID: UF00053549
Volume ID: VID00001
Source Institution: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: oclc - 62320097

Full Text



AGRICULTURAL RESEARCH CENTER, JAY

Jay, Florida 32565

Jay ARC Research Report WF73-6 DECEMBER 1973

SORGHUM SILAGE FOLLOWING CORN AND AA-W L* LI1J | .

SINGLE CROP HARVESTED TWICE 1
| JAN 1 8 1974

L. S. DunavinI

A trial was conducted in 1973 in which forage sordhli Laeoa. and

field corn in a double cropping system for silage production. These methods were

compared to the use of sorghum when two harvests were removed from one sorghum

planting. Data for the corn silage trials have previously been published in Jay

ARC Research Report WF73-4. Weather conditions resulted in a somewhat late

planting date for the single-crop sorghum and the corn. This resulted in a delay

in harvests and planting of sorghum following corn. Harvests were late and,

particularly in regard to the sorghum ratoon crop, would probably have been

prevented by frosts in most years. Four replications were used and data presented

are based on averages of the four replications. Data are presented in tables 1,

2, 3, and 4.

The highest yield of green forage (the actual ensilable product) was obtained

from the first harvest of early planted sorghum. This was also true for oven-dry

forage and grain. Although there are varietal differences, generally more silage

was obtained from the sorghum following sweet corn than from that following field

corn. This also appears to be true from the standpoint of dry forage and dry grain.

While the green forage from the ratoon crop is very nearly equal to that from the

sorghum following sweet corn, the dry forage appears lower and the grain is

exceedingly lower. In analyzing this year's data, one should be very cognizant of

the weather conditions and of the times of planting and harvest which were certain-

ly not normal.


1Associate Professor (Associate Agronomist)







Table 1


SORGHUM SILAGE FOLLOWING SWEET CORN

Agricultural Research Center
Jay, Florida
1973


Brand

Taylor-Evans
Rudy-Patrick
DeKalb
Funk


Maturity

Dough
Dough
Dough
Dough


Total Green
Pounds Per
15,100
22,500
18,400
20,800


Height
(Inches)
72
99
75
90


Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F


Forage Total Dry Forage Oven-dry Grain
Acre Pounds Per Acre Pounds Per Acre
4,400 1,600
6,800 2,500
5,500 2,400
7,300 2,900


Lodged
(%)
0
1
0
0


Date
Headed
Oct 9
Oct 4
Oct 8
Oct 8


Insect Damage
(0-10)
1
1
0
0


Green Weight Basis
% Heads* % Leaves % Stalk
27 14 59
23 7 70
30 13 57
31 15 54


Dry
% Heads*
48
46
54
48


Date
Harvested
Nov 19
Nov 16
Nov 19
Nov 19

Bird Damage
(0-10)
1
0

0


Weight Basis
% Leaves %
14
10
14
15


Stalk
38
44
32
37


*Includes rachis.


Planted:
Fertilizer:


Soil Type:
Chemicals:
Seeding Rate:


July 17, 1973.
200 Ibs./acre of ammonium nitrate on 20 Aug 73. The sweet corn
preceding the sorghum received 550 lbs./acre of 0-20-20 and
300 lbs./acre of ammonium nitrate.
Red Bay fine sandy loam.
2 lbs. Sevin per acre when in anthesis to control midge.
10 lbs. per acre.


-2-


Disease at Harvest
(0-10)
6







Table 2


SORGHUM SILAGE FOLLOWING FIELD CORN

Agricultural Research Center
Jay, Florida
1973


Brand

Taylor-Evans
Rudy-Patrick
DeKalb
Funk


Maturity

Dough
Dough
Dough
Dough


Total Green Forage
(Pounds Per Acre)
16,000
15,500
15,100
19,600


Height
(Inches)
75
90
70
85


Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F


Total Dry Forage
(Pounds Per Acre)
5,100
5,300
4,700
6,300


Lodged
(%)
1
1
1
2


Insect Damage
(0-10)
0
0
0
0


Green Weight Basis
% Heads* % Leaves % Stalk
32 11 57
26 0 65
30 13 57
29 11 60


Dry
% Heads*
57
49
58
53


Date
Headed
Oct 14
Oct 8
Oct 14
Oct 12


Oven-dry Grain
(Pounds Per Acre)
2,300
2,200
2,200
2,700


Date
Harvested
Nov 27
Nov 27
Nov 27
Nov 27


Bird Damage
(0-10)
0
0
0
0


Weight Basis
% Leaves % Stalk
14 29
10 41
13 29
14 33


*Includes rachis


Date Planted:
Fertilizer:


Soil Type:
Chemicals:
Seeding Rate:


July 23, 1973.
200 lbs./acre of ammonium nitrate on 20 Aug 73. The field corn
preceding the sorghum received 550 Ibs./acre of 0-20-20 and
300 Ibs./acre of ammonium nitrate.
Red Bay fine sandy loam.
2 lbs. Sevin per acre in anthesis to control midge.
10 lbs. per acre.


-3-


Disease at Harvest
(0-10)
5
6
4
4







Table 3


SORGHUM SILAGE FIRST HARVEST

Agricultural Research Center
Jay, Florida
1973


Brand

Taylor-Evans
Rudy-Patrick
DeKalb
Funk


Maturity

Dough
Dough
Dough
Dough


Total Green Forage
(Pounds Per Acre)
51,200
60,100
56,300
58,700


Height
(Inches)
90
111
95
94


Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F


Total Dry Forage
(Pounds Per Acre)
13,300
16,800
14,600
17,600


Lodged
(%)
2
6
5
3


Insect Damage
(0-10)
1
1


Green Weight Basis
% Heads* % Leaves % Stalk
18 15 67
18 13 69
17 16 67
20 17 63


Date
Headed
July 15
July 10
July 11
July 9


Oven-dry Grain
(Pounds Per Acre)
4,700
5,900
5,000
6,870


Date
Harvested
Aug 12
Aug 5
Aug 7
Aug 4


Bird Damage
(0-10)
1
0
1


Dry Weight Basis
% Heads* % Leaves % Stalk
42 17 41
40 13 47
40 17 43
44 18 38


*Includes rachis


Date Planted:
Fertilizer:

Soil Type:
Chemicals:


Seeding Rate:


April 12, 1973.
Pro-plant application of 550 Ibs. per acre of 0-20-20; side-
dressed with 300 lbs./acre of ammonium nitrate on May 17.
Red Bay fine sandy loam.
5 Ibs./acre of 20% Heptachlor on April 13 to control sugar can
beetles; 1 pint/acre of 2,4-D on May 11 to control broadleaf
weeds.
10 lbs./acre.


-4-


Disease at Harvest
(0-10)
3
3
4
3







Table 4


SORGHUM SILAGE RATOON HARVEST

Agricultural Research Center
Jay, Florida
1973


Brand

Taylor-Evans
Rudy-Patrick
DeKalb
Funk


Total Green Forage
(Pounds Per Acre)
20,800
19,100
19,200
20,400


Total Dry Forage
(Pounds Per Acre)
4,400
5,000
4,200
6,100


Oven-dry Grain
(Pounds Per Acre)
800
1,700
900
2,600


Entry Maturity


Dough
Dough
Dough
Dough


Height
(Inches)
81
96
83
88


Disease at Harvest
(0-10)


Green
% Heads*
22
22
22
28


Lodged
(%)
1
2
1
3


Insect Damge
(0-10)
1
0
0
0


Weight Basis
% Leaves % Stalk
14 64
8 70
12 66
7 65


Date
Headed
Oct 22
Oct 15
Oct 13
Oct 17


Date
Harvested
Nov 16
Nov 16
Nov 16
Nov 28


Bird Damage
(0-10)
0
0
0
0


Dry Weight Basis
% Heads* % Leaves % Stalk
35 18 47
44 12 44
36 17 47
53 11 36


*Includes rachis.


Date Planted:
Fertilizer:


Soil Type:
Chemicals:
Seeding Rate:


April 12, 1973.
Pre-plant application of 550 Ibs. per acre of 0-20-20; side-
dressed with 300 lbs./acre of ammonium nitrate on May 17 and
with 200 lbs./acre of ammonium nitrate on August 27.
Red Bay fine sandy loam.
2 lbs./acre of Sevin in anthesis.
10 Ibs./acre.


-5-


Entry

TDN
55F
FS-24
102F


TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F

Entry

TDN
55F
FS-24
102F




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