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Florida 2001 and 2002 Short, Mid and Full Season Corn Variety Tests for Silage and Grain
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 Material Information
Title: Florida 2001 and 2002 Short, Mid and Full Season Corn Variety Tests for Silage and Grain
Physical Description: Fact Sheet
Creator: Wright, David L.
Publisher: University of Florida Cooperative Extension Service, Institute of Food and Agriculture Sciences, EDIS
Place of Publication: Gainesville, Fla.
Publication Date: 2003
 Notes
Acquisition: Collected for University of Florida's Institutional Repository by the UFIR Self-Submittal tool. Submitted by Melanie Mercer.
Publication Status: Published
General Note: "Revised January, 2003."
General Note: "SS-AGR-162"
 Record Information
Source Institution: University of Florida Institutional Repository
Holding Location: University of Florida
Rights Management: All rights reserved by the submitter.
System ID: IR00001550:00001

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SS-AGR-162 Florida 2001 and 2002 Short, Mid and Full Season Corn Variety Tests for Silage and Grain1 D. L. Wright, B. Kidd, P. J. Wiatrak, and J. J. Marois2 1. This document is SS-AGR-162, one of a series of the Agronomy Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Revised January, 2003. Visit the EDIS Web Site at http://edis.ifas.ufl.edu. 2. D. L. Wright, professor, Agronomy Department; B. Kidd, Senior Biological Scientist; P. J. Wiatrak, Assistant in; J. J. Marois, professor, Plant Pathology Department; North Florida Research and Education Center, Quincy FL. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32610. The use of trade names in this publication is solely for the purpose of providing specific information. UF/IFAS does not guarantee or warranty the products named, and references to them in this publication does not signify our approval to the exclusion of other products of suitable composition. The Institute of Food and Agricultural Sciences is an equal opportunity/affirmative action employer authorized to provide research, educational information and other services only to individuals and institutions that function without regard to race, color, sex, age, handicap, or national origin. For information on obtaining other extension publications, contact your county Cooperative Extension Service office. Florida Cooperative Extension Service/Institute of Food and Agricultural Sciences/University of Florida/Christine Taylor Waddill, Dean. The objective of the corn variety trials was to compare varieties for silage and grain yields. The studies were conduced on a Dothan sandy loam (fine loamy siliceous, thermic Plinthic Kandiudult) at the North Florida Research and Education Center (NFREC) / Univ. of Florida, Quincy, FL in 2001 and 2002. Data from 2001 were included since digestibility of the silage was not included in last year's report. Cultural Practices for Corn Variety Tests in 2001 The wheat cover crop in the experimental area was broadcast-sprayed with Roundup Ultra @ 2 qts/A on 20 March. On 3 and 5 April corn was planted strip-till in plots 23 ft long and 3 ft wide row spacing. Corn was fertilized with 3-9-18 (N-P2O5-K2O) fertilizer @ 600 lbs/A (2-3 inches from the planted corn rows) on 6 April. All studies were sprayed with herbicides Aatrex @ 1 qt/A + Prowl @ 1.5 pt/A + Agridex @ 1 qt/A on 17 April, Lorsban @ 2 pts/A for insect control on 18 April, and Permit @ 1 oz/A + Induce @ 1 qt/100 gals on 30 April for nutsedge control. Corn was side-dressed with ammonium nitrate (34-0-0 of N-P2O5-K2O) @ 450 lbs/A on 4 May and ammonium sulfate (21-0-0-24 of N-P2O5-K2O-S) @100 lbs/A on 10 May using a FP row fertilizer applicator. All studies were broadcast-sprayed with Permit @ 1 oz/A + Induce @ 1 qt /100 gals solution on 10 May and Solubor DF @ 0.5 lbs /A a.i. Boron on 11 May. On 24 May herbicides Accent @ 1 oz/A + Aatrex @ 1 qt/A + Agridex @ 1 qt/A were direct-sprayed on corn rows. A Hesston silage chopper was used to cut 2 rows of corn x 23 ft long for silage on 23 July (Short and Mid Season Variety Trials for Silage) and 30 July (Full Season Variety Trials for Silage) at the 1/2 kernel milk-line stage. The silage yields were calculated to 35% DM. Corn was harvested for grain on 15 and 16 August (Short Season Variety Trial for Grain) and 23 August (Mid and Full Season Variety Trial for Grain). Corn Variety Tests in 2002 The small grain experimental area was killed with Roundup Ultra @ 1.5 pt/A on 8 March and ripped with the Brown Ro-till planter on 19 March (exception: 5 and 19 April for the Mid and Full Season Corn Grain Variety Trials, respectively). On

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Florida 2001 and 2002 Short, Mid and Full Season Corn Variety Tests for Silage and Grain 2 25 March corn was planted strip-till into plots 23 ft long and 3 ft row spacing with the application of Phorate 20G @ 6 oz/1000 ft of row for soil insects (exception: 25 April for the Mid and Full Season Corn Grain Variety Trials). Corn was fertilized with 3-9-18 (N-P2O5-K2O) fertilizer @ 600 lbs/A (2-3 inches from the planted corn rows) on 25 and 26 March (exception: 25 April for the Mid and Full Season Corn Grain Variety Trials). These studies (except the Mid and Full Season Corn Grain Variety Trials) were broadcast-sprayed with Aatrex @ 1 qt/A + Prowl @ 1.5 pt/A + Agridex @ 1 qt/A on 9 April and direct-banded with Deadline M-PS @ 10 lbs/A on 19 April. Corn was side-dressed with ammonium nitrate (34-0-0 of N-P2O5-K2O) @ 450 lbs/A on 22 April (exception: 13 May for the Mid and Full Season Corn Grain Variety Trials). The variety trials were broadcast sprayed with Lorsban @ 2 pts/A on 1 and 7 May, and Permit @ 1 oz/A + Accent @ 0.75 oz/A + Induce @ 1 qt/100 gals on 9 May. On 21 and 30 May the Mid and Full Season Corn Grain Variety Trials were broadcast-sprayed with Lorsban @ 2 pts/A. The Hesston silage chopper was used to cut 2 rows of corn x 23 ft long for silage on 9 and 10 July (Short and Mid Season Variety Trials for Silage) and 15 July (Full Season Variety Trials for Silage) at the 1/2 kernel milk-line stage. The silage yields were calculated to 35% DM. Corn was harvested for grain on 6 August (Short Season Variety Trial for Grain) and 20-22 August (Mid and Full Season Variety Trial for Grain). Tables 1 and 2 show the silage yields, % nitrogen (N) of dry matter (DM), % crude protein (CP) (DM), % organic matter (OM) (DM), and % in vitro organic matter digestibility (IVOMD) for the Short, Mid, and Full Season Corn Variety Trials for silage and Tables 3 and 4 show the grain yields for the Short, Mid, and Full Season Corn Variety Trails for grain in 2001. Tables 5 and 6 show the silage yields for all corn variety trials for silage, Table 5 shows % N (DM), % CP (DM), % OM (DM), and % IVOMD for the Short and Mid Season Corn Variety Trials for silage, Tables 7 and 8 show the grain yields for the Short, Mid, and Full Season Corn Variety Trails for grain in 2002. Key Management Considerations for Corn Production 1. Variety selection: varieties should be compared over years and location for consistency in yield and quality. 2. Starter fertilizer should be applied 2x 2 or as a surface dribble and not sprayed over the row. Nitrogen should be applied on the surface an inch away from the row for each 10 lbs/A N used. Starter N containing 50% N +S and 50% 10-34-0 makes a good starter for corn. 3. Conservation tillage Strip-till planting decreases erosion, increases soil organic matter, soil moisture, and improves soil texture and may result in increased yields. These planters must have subsoilers to break the compaction layer to improve root growth and yield under stress conditions. Cover crops should be killed 3 to 4 weeks prior to planting to reduce insect and moisture deficit problems. 4. Planting dates: plantings made from mid-February to mid-April are suitable for corn in Florida. 5. Plant populations: desired corn plant population is 28,000 plants for irrigated and 22,000 24,000 plants for non-irrigated corn and can vary with soil type and hybrid. 6. Nitrogen applications should be split. For irrigated and non-irrigated corn, N should be applied at 20-30 lbs/A as starter, 30-40 lbs/A when corn is 1 ft tall, and 60 lbs/A when corn is 24-30 inches tall. An additional rate of 60 lbs/A can be applied 2 weeks later through the irrigation system for irrigated corn. All N should be applied to corn before or no later than silking and tasseling stage. Total application of N for non-irrigated corn is 120 lbs/A and for irrigated corn is 180-200 lbs/A. depending on soil type and cropping history. Other nutrients should be applied according to soil tests and at planting. Potassium may be split applied with one-third (1/3) at planting and the remainder by 24 inches tall on sandy soils.

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Florida 2001 and 2002 Short, Mid and Full Season Corn Variety Tests for Silage and Grain 3 7. Weed control: effective weed control is one of many critical components of successful corn production. Weeds must be controlled early for best yields and lowest cost. 8. Insect control: effective scouting with timely and proper insect management of armyworms and earworms is very important. 9. Good rotation should be followed and nematode levels monitored.

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Florida 2001 and 2002 Short, Mid and Full Season Corn Variety Tests for Silage and Grain 4 Table 1. Short and Mid Season Irrigated Corn Variety Trial for Silage: Quincy, FL 2001. Brand Hybrid Silage yield ----T/A ----N (DM) -% -CP (DM) -% -OM (DM) -% -IVOMD -% -DeKalb DK 697 29.5 1.11 6.95 96.7 62.9 Zimmerman 1851W 26.1 1.29 8.03 96.5 65.4 Croplan Genetics 827 24.8 1.24 7.72 96.1 62.8 Pioneer 31R88 24.5 1.08 6.75 96.8 63.4 AgraTech 1701 23.5 1.13 7.08 97.0 66.4 Pioneer 31G98 23.4 1.25 7.82 96.5 66.2 DeKalb DKC88-70 23.2 1.24 7.78 96.6 65.1 Pioneer 33J56 23.0 1.23 7.71 97.1 67.7 Croplan Genetics DS820 22.9 1.33 8.29 96.4 66.6 Croplan Genetics DS740 22.7 1.36 8.50 96.7 68.3 Southern States SS859CL 22.3 1.17 7.29 96.3 61.9 NK N 8811 20.8 1.14 7.14 96.7 64.6 AgraTech 905RR 20.4 1.10 6.89 96.9 64.2 NK N 83-N5 20.2 1.17 7.34 69.6 65.6 Garst/AgriPro 8288 20.0 1.21 7.59 96.7 68.4 Croplan Genetics DS723 19.8 1.36 8.51 96.5 68.3 AgraTech 890 17.4 1.32 8.27 96.4 65.6 Croplan Genetics 733Bt 17.1 1.26 7.89 96.5 66.7 Average 22.3 1.22 7.64 96.6 65.6 LSD(0.05) 5.31 0.096 0.602 0.38 3.44 Table 2. Full Season Irrigated Corn Variety Trial for Silage: Quincy, FL 2001. Brand Hybrid Silage yield ----T/A ----N (DM) -% -CP (DM) -% -OM (DM) -% -IVOMD -% -Pioneer 30F33 30.4 1.38 8.62 96.3 66.6 Southland Genetics SG1877 27.5 1.27 7.92 96.2 61.1 Southern States SS1060 25.7 1.36 8.49 95.9 64.9 NK N91-R9 24.6 1.28 7.97 96.3 64.4 Greenwood 830 23.3 1.29 8.07 95.9 64.5 AgraTech 1836 20.5 1.32 8.24 96.2 65.0 Southland Genetics SG 1836 20.2 1.35 8.44 96.0 64.6 AgraTech 1010RR 19.5 1.31 8.21 96.2 62.8 Average 24.0 1.32 8.25 96.1 64.2 LSD(0.05) 6.28 NS NS NS 2.32

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Florida 2001 and 2002 Short, Mid and Full Season Corn Variety Tests for Silage and Grain 5 Table 3. Short Season Irrigated Corn Variety Trial for Grain: Quincy, FL 2001. Brand Hybrid Grain yield ----Bu/A---Pioneer 31G98 179.1 Pioneer 32H58 173.3 Garst/AgriPro 8222IT 164.0 Pioneer 32k61 162.0 Southern States SS781CL 160.0 Zimmerman 1851W 159.6 Pioneer 32R25 156.0 Croplan Genetics 767RR 154.7 Dyna-Grow 5516RR 149.3 AgraTech 721RR 144.8 AgraTech 787 139.3 Funks G 5516 132.7 Average 156.2 LSD(0.05) 24.55 Table 4. Mid and Full Season Irrigated Corn Variety Trial for Grain: Quincy, FL 2001. Brand Hybrid Grain yield ----Bu/A ----DeKalb DK 697 166.7 Pioneer 3146 161.5 Croplan Genetics 702 154.6 NK N 83-N5 153.7 AgraTech 905RR 152.7 NK N91-R9 148.8 Garst/AgriPro 8288 148.8 DeKalb DKC88-70 147.3 NK N 8811 145.0 Pioneer 31R88 141.1 Southern States SS882CL 131.4 Croplan Genetics 1167CL 122.9 Average 147.9 LSD(0.05) 23.95 Table 5. Short and Mid Season Irrigated Corn Variety Trial for Silage: Quincy, FL 2002. Entry # Brand Hybrid Silage yield T/AN (DM) -% -CP (DM) -% -OM (DM) -% -IVOMD -% -18 Southern States SS842RR 27.5 1.31 8.20 96.3 65.1 6 Croplan Genetics DS738 27.2 1.31 8.17 96.5 69.6 11 Dyna-Gro 5515 27.2 1.27 7.96 96.3 67.5

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Florida 2001 and 2002 Short, Mid and Full Season Corn Variety Tests for Silage and Grain 6 Table 5. Short and Mid Season Irrigated Corn Variety Trial for Silage: Quincy, FL 2002. Entry # Brand Hybrid Silage yield T/AN (DM) -% -CP (DM) -% -OM (DM) -% -IVOMD -% -16 NK N 83-N5 26.2 1.21 7.55 96.6 65.5 15 Greenwood 780 26.0 1.17 7.33 96.6 71.8 2 AgraTech 919 25.2 1.24 7.74 96.3 66.5 12 Dyna-Gro 5516RR 25.0 1.28 7.99 96.6 65.3 10 DeKalb DKC65-00(RR) 24.7 1.27 7.97 96.1 67.7 9 DeKalb DK687RR 24.5 1.36 8.51 96.3 68.6 17 Pioneer 31G98 24.2 1.32 8.22 96.3 67.1 4 Croplan Genetics 818RR 24.1 1.30 8.13 96.8 66.3 5 Croplan Genetics 827RR 24.1 1.22 7.63 96.2 65.0 19 Zimmerman 1851W 23.9 1.40 8.78 96.4 67.7 3 AgraTech 905RR 23.8 1.27 7.94 96.3 72.9 1 AgraTech 785 23.7 1.25 7.81 96.3 68.1 8 Croplan Genetics DS822RR 23.0 1.25 7.79 95.9 65.4 13 Dyna-Gro 5518RR 22.6 1.28 8.01 96.5 66.2 14 Garst/AgriPro 8288 22.5 1.34 8.37 96.7 69.5 7 Croplan Genetics DS740 21.9 1.36 8.53 96.7 69.7 Average 24.6 1.29 8.03 96.4 67.7 LSD(0.05) 3.53 0.091 0.567 0.37 NS Table 6. Full Season Irrigated Corn Variety Trial for Silage: Quincy, FL 2002. Entry # Brand Hybrid Silage yield ---T/A ---N (DM) ---%--CP (DM) ---%--OM (DM) ---%--IVOMD ---%--7 NK N91 R9 29.9 1.29 8.06 96.2 64.4 3 Foundation Seed Tex Cuban 27.7 1.33 8.28 96.0 63.8 8 Pioneer 30F33 26.0 1.29 8.05 96.2 62.5 5 Greenwood 835 25.9 1.33 8.33 96.4 66.2 6 Greenwood 860 25.4 1.31 8.16 96.4 65.4 2 AgriTech 1836 24.7 1.26 7.85 96.4 64.4 4 Greenwood 830 23.2 1.29 8.09 95.5 62.7 1 AgriTech 1010RR 19.7 1.35 8.44 96.2 66.0 Average 25.3 1.31 8.16 96.1 64.4 LSD(0.05) 4.21 NS NS NS NS Table 7. Short Season Corn Grain Variety Trial: Quincy, FL 2002. Entry # Brand Hybrid Grain yield ---Bu/A ---3 Pioneer 31G98 193 10 Southern States SS781CL 177

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Florida 2001 and 2002 Short, Mid and Full Season Corn Variety Tests for Silage and Grain 7 Table 7. Short Season Corn Grain Variety Trial: Quincy, FL 2002. Entry # Brand Hybrid Grain yield ---Bu/A ---2 Zimmerman 1851W 176 5 Croplan Genetics 818Bt 170 16 Terral TV26BR10n 165 14 Terral TV2155Bt 159 15 Terral TV2160Bt 158 9 Croplan Genetics G71CL/Bt 153 12 Terral TV2140Xn1RR 153 8 Garst 8366Bt 148 6 Garst/AgriPro 8222IT 147 1 Dyna-Gro 5515 142 13 Terral TV2140Xn2RR 132 7 Garst 8285RR 128 4 Dyna-Gro 5516RR 125 11 Terral TV2140RR 125 Average 153 LSD(0.05) 29.2 Table 8. Mid and Full Season Corn Grain Variety Trial: Quincy, FL 2002. Entry # Brand Hybrid Grain yield ---Bu/A ---5 DeKalb DKC68-70(YG) 185 12 Pioneer 30F33 168 6 DeKalb DKC69-70(YG) 142 4 DeKalb DK687RR 141 2 Croplant Genetics 702 125 3 DeKalb DK 697 122 10 NK N 83-N5 122 14 Southern States SS842RR 122 1 Asgrow RX897RR 120 9 Garst/AgriPro 8288 111 7 Foundation Seed Tex-Cuban 104 13 Pioneer 31R88 92 8 Garst 8118RR 87 11 NK N91-R9 84 Average 123 LSD(0.05) 21.1