Results of the Iowa Corn Yield Test are published to aid Iowa farmers in selecting corn varieties. This is the fifty-sixth consecutive year for the test

Falck, William E.

Hutchcroft, C. D.

English

Results of the Iowa Corn Yield Test are published to aid Iowa farmers in selecting corn varieties. This is the fifty-sixth consecutive year for the test.</p

Falck, William

Hutchcroft, C.

Digital Repository @ Iowa State University (ISU)

THE 1975 IOWA CORN YIELD TEST REPORT District -4 Upland Results of the Iowa Com Yield Test are published to aid Iowa farmers in selecting com varieties. This is the fifty-sixth consecutive year for the test. The presentation of data for the varieties tested does not imply approval or endorsement by the authors or by the agencies sponsoring or conducting the test. Iowa State University approves the reproduction of any table in this re-port only if no portion is deleted and if the order of the data is not rearranged. Entries in tables I and 2 are designated by brand name and variety. 1975 Procedure Producers of corn seed and Iowa State University were eligible to enter varieties in the Iowa Com Yield Test. Each producer was allowed a maximum of nine entries per district. All entries had to be available in a quantity of at least JO bushels. One-hundred varieties were compared in this test. Two open-pedigree varieties were entered by Iowa State University from its com breeding program. Twenty-five of the varieties were determined to be widely grown and were entered by Iowa State University. Varieties were considered widely grown if they were planted on 0.90 percent or more of the com acreage in the district according to the 1974 survey of Iowa corn growers. Iowa State University entered a max-imum of five widely grown varieties of any given brand. These entries were given priority over the remaining 73 en-tries made by seed producers. Each entry was replicated four times in 4-row plots at a planting rate of 21,000 kernels per acre at each location. All locations were machine-planted. The center two rows of each plot were harvested with a corn combine. No gleanings or dropped ears were included in yield data. A moisture de-termination was made from each plot, and yields were cor-rected to 15.5-percent moisture for shelled com. Prepared by William £. Falck. associate in agmnomy, and C.D. H111chcroft, professor of agronomy and secretary of the Iowa Crop Improvement Association. IOWA STATE UNIVERSITY of Science and Technology Cooperative Extension Service, Agriculture and Home Economics Experiment Station, Iowa Crop Improvement Association, and the United States Department of Agriculture, cooperating How Information Is Presented The data presented are averages of two locations in 1973 and 1975 and of one location in 1974. Yield in bushels per acre and percentages of moisture, root lodging, stalk lodging, dropped ears, and stand are shown for all varieties tested in 1975 and for varieties tested in 1973 and 1974 that were in the 1975 test. Interpretation of Results Yield differences due to variation in soil, fertility moistur~ ~vailability, insect infestation, and diseases, plu~ ~ny ~anation due to planting and harvesting techniques, are 1dent1fied through statistical analysis. The LSD values shown in tables I and 2 represent, in bushels per acre, the amounts of yield variation that could be due to variations in the factors just mentioned. In comparing varieties, yield dif-ferences greater than the LSD value can be attributed to genetic differences in the yield potential of these varieties· yield differences less than the LSD value are not statistical!; different and could have been due to other factors. Grain moistures shown in tables 1 and 2 are indicators of maturity and natural drying rate. Maturity of varieties en-tered generally ranged from early to full season. Yield com-parisc_ms should b~ made among varieties of similar maturity. Yield compansons were made at one plant population that was similar to the moderate planting rate in the past years. It is important to select varieties having stable p~rformance over a range of environmental conditions. High yields for two or more consecutive years indicate stable performance. Supplemental yield and agronomic informa-tion about specific varieties may be obtained from your seed corn dealers and from neighbors who have grown these varieties. Ames, Iowa December 1975 Pm-660-4U TABLE lo AVERAGE PERFCRMANCE OF VARIETIES TESTED IN DISTRICT 4Uo MODERATE POPULATICN - 21.000 PLANTING RATE. LSD FOR 1975 YIELD IN BUSHELS IS 16. ROOT STALK DROPPED YIELD BUo/A MCISTURE PCT. LODGING PCT. LODGING PCT. EARS PCT. STAND PCT. BRANO VARIETY CRCSS 1973 1974 1975 1975 1974 1973 1975 1974 1973 1975 1974 1973 1975 1974 1973 1975 1974 1973 •PICl'iEER •o•s GOLD SUPER CROST •FUl\KS FUNKS 3780 SXllOO S27 G4444 G4321A GOLDEN HARVEST H2510 GOLDEN HARVEST H2450 SUPER CROST 2890 HULTING •TROJAN •CROWS CURRY SUPER CAOST •ACCO SCHETTLER WILSCN •NORTHRUP KING LYNKS •PIONEER HULT ING •TROJAN HULT ING AMERICANA •DEKALB •DEKALB •PAG FUNKS •PlONEEA •NORTHRUP KING •PIONEER AS GROW NC+ ~ICNEER PAG MC CURDY •DEKALB WILSON FS CURRY •CARGILL •PAG WILSON NORTHRUP KING ACCO ASGROW AMERICANA TEKSEED NORTHRUP KING A·CCO HULT ING GOLDEN HARVEST CARGILL CARGILL GOLDEN HARVEST NC+ MC CURDY TEKSEED SCHETTLER •TROJAN FONTANELLE LYl\KS WILSON X9600 TXS102 226 SCl42 4242 UC330l 4201 2317 PX50A 4200 3517 X770 TXSlll X9780 3500A XL43 XL54 SX397 G4449 3388 PX610A 3529 RX8 l 57 3390 SX424 MSX60 XL64 170 0 680 TC358A 930 SX7 1800 PX614 UC7151 RX90 3200 SPX39A PX74 UC360l X8775 H2645 920 949 H2655 59 MSX84 SPX383 SX19 TXS115A 580SC 4330 1040 SX sx SX SX 142 sx sx SX SX 3X sx 135 sx SX MS SX 146 sx MS 145 sx 144 SX MS 143 sx 134 SX 152 3X 128 MS sx sx sx SX MS 149 3X MS SX sx MS 145 sx SX sx 154 sx SX 3X SX 148 SX 146 SX 3X sx sx sx sx SX SX 149 3X 131 SX sx sx MS sx sx sx sx sx SX 5X sx 156 IOWA STATE UNIV SX43 (873XB75) SX FONTANELLE 611SC SX GOLDEN HARVEST H2500 SX FUNKS TEKSEED o•s GOLD PAG MC CURDY G4503 SPX34 SX5500A SX494 MSX70 IOWA STATE UNIV SX42 (870XB73) MCALLISTF.R SX7300 SUPER CROST S67 SUPER CROST ACCO AMERICANA FUNKS NORTHRUP KING WILSCN •DEKALB AMERICANA FS •TROJAN MCALLISTER AMERICANA ACCO FEDERAL TEKSEED •DEKALB •TROJAN MCALLISTER FARMERS FUNKS o•s GOLD MC CURDY NC+ •PAG LYNKS FS FS 5440 UC9301 9300 G4507 PX675 2395 XL372 4400 611 TXS117A SX7408 4800 UC945l FX59 SPX36 XL 75 TXSll9 SX6837 45B9 G4628 SX5500 MSX88 85 SX98 4510 850 854 sx sx SX 163 sx sx sx sx MS sx sx 154 3X SX 3X MS 3X MS sx sx sx sx sx SX sx sx sx 157 sx SX sx sx 155 sx sx 156 sx sx 147 sx SX 120 122 114 125 132 1 Ol: 134 1C3 1 l c; 123 10<; llB 1 cc; 117 133 127 105 112 1:: 1 124 123 122 1 l c; 1 12 122 123 122 I 10 112 103 132 12 1 115 128 123 130 117 120 128 120 12 1 117 113 123 114 11 7 1:: 1 1 2 1 134 l 14 131 123 118 123 11 7 138 125 ·119 145 127 119 126 120 121 115 132 1.3 2 117 122 132 11 4 12B 105 11 B 125 135 12 I 11 2 120 13B 121 116 104 116 119 128 126 14 3 119 120 112 119 124 toe; 123 115 120 12!! 109 115 110 110 117 135 119 120 114 140 11:: 13 1 12 1 130 136 115 129 125 126 13 1 135 l 1 :! 116 128 135 12 1 121 103 130 122 124 111 130 119 134 126 12 I 136 115 120 131 128 11B 11 I 12c 132 117 118 135 132 1.33 140 11 8 13 I 18.6 19.4 19.5 25.2 20.0 25.7 17.1 20.0 23.4 20.2 20.2 2408 20.3 20 .4 20.s 2s.2 17.6 20.9 20.9 20.9 25.2 20.9 2406 11.1 21.0 1 12 4 5 5 0 5 2 B 13 15 6 2 6 21.1 24.4 17.5 21.1 26.0 17.5 6 21.1 25.3 13 21.B 25.9 10.9 o 21.B 25.5 lB.o 22.1 24.6 18.2 22.2 25.4 19.6 22.2 2 22.3 0 22.4 22.5 25.6 22.5 22.5 26.2 19.7 22.5 25.s 22.6 22.6 22.B 25.o 22.0 26.1 11.5 23.0 23.4 26.0 23.4 27.7 21.1 23.4 23.5 2306 23.7 27.6 18.7 23.7 26.6 20.3 23.8 27.4 23.8 2308 23.9 26.7 23.9 23.9 24.0 27.6 ::io•-• 27 - • 24ol 2706 20o0 24.6 24.6 24.7 24.7 29.6 24.7 27.1 2408 26.8 24.e 24.8 24.B 27.0 24.9 26.6 25.o 27.o 25.0 20.0 20.2 25.o 25.1 27.1 25.1 26.9 1 0 0 0 0 2 0 0 4 1 0 0 0 3 3 2 0 0 0 2 3 2 .. 0 2 7 0 1 2 0 2 0 4 2 25.1 1 25.2 o 25.2 21.0 19.4 o 25.3 12 25.3 25.3 25.7 26.B 25.B 29.4 25.8 26.5 25.9 29.7 23.3 25.<; 2908 26.0 27.1 26.2 26.2 29.7 26.4 26.5 21.2 27.B 2B.3 28.3 28.5 28.7 28.7 28.9 28o9 29o4 25.4 28 • ., 29.1 30.l 29.1 29.4 29.3 25.4 29.5 30.1 29.5 29.3 22.3 30.0 30.5 30.1 2908 25.5 30.9 31.5 5 0 3 1 3 2 0 2 B 5 0 0 0 1 0 0 0 0 0 0 0 0 0 4 12 14 20 11 10 22 4 2 19 9 2 29 1 1 4 8 15 -3 -1 4 5 9 8 0 1.i! 3 0 3 9 9 2 0 19 0 17 6 3 15 3 0 0 10 0 0 0 0 I 0 0 0 0 0 0 0 0 0 0 0 4 2 3 3 4 3 2 2 5 2 2 3 6 4 2 3 2 4 1 8 2 2 3 3 1 .3 2 3 2 3 3 3 2 2 2 2 2 2 3 3 6 4 .3 2 2 4 2 3 2 3 2 2 2 4 4 2 3 5 2 1 2 3 3 2 3 3 2 2 3 :I 2 3 4 2 4 7 4 2 () 4 2 4 3 5 2 3 4 · 3 5 0 0 0 0 0 2 0 0 2 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 2 0 0 3 2 2 3 2 5 2 3 2 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 I 0 0 0 0 I 0 0 0 0 0 0 0 0 0 I 0 0 0 1 1 0 I 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 1 0 1 c 0 0 0 0 0 0 0 0 3 0 0 0 0 4 0 0 0 0 2 0 2 0 0 0 1 0 2 4 3 2 0 0 0 2 3 0 I 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 79 B3 72 91 79 88 B5 81 B9 65 Bl 83 B2 84 83 79 75 B3 71 84 69 BO B7 82 BO Bl BO 86 75 Bl 7B 78 82 87 81 B7 B2 77 BO Bl 76 71 B7 79 75 76 BO 75 :;::; 74 BO 76 78 Bl 90 B2 B7 B6 BO 91 77 B9 BO 79 Bl 90 77 78 B7 B6 91 75 72 B5 B2 B9 79 7B Bl B3 83 B6 B4 76 84 7B B5 84 81 78 B5 B3 77 B3 Bl Bl 86 7B 80 B6 B2 B6 92 93 B4 BB 83 B6 91 B6 B3 B7 87 8B B9 86 Bl 87 B7 92 89 8B 88 83 88 88 89 B6 93 93 85 89 Bl 90 82 B3 B9 90 87 B9 97 B9 B8 84 89 B7 85 BO 90 78 91 88 90 82 89 95 76 88 86 88 94 97 88 91 92 , 90 87 B8 92 90 84 86 AVERAGE OF ALL ENTRIES 146.9 119.6 123.1 24.4 27.0 20.0 2.2 6.6 0.4 2.1 0.4 108 o.3 0.1 0.2 8lo2 0 7 .t 88 • 9 -----------------------------------------------------------------------------------------------------------------------------------SX = SINGLE CROSS. MS = MODIFIED SINGLE CROSS. 3X = 3-•AY CROSS· 4X = 4-WAY CROSS. •WIDELY GROWN VARIETY. 1975 Field Data The District 4 Upland test was conducted on farms operated by Clifford Boyer near Silver City in Mills County and by Gerald Thiedeman near Westside in Crawford County. The field data are presented in Table A. Subsoil moisture was favorable at planting time. Rainfall was below normal during May, June, July, and August and above normal during September. Temperatures were above normal during May, June, July, and August and below normal during September. Yields were about normal for the district. Table A. Field Data Thiedeman Farm Marshall silty clay loam Boyer Farm Marshall silty clay loam Fertilizer applied, lbs . N P,05 K 10 N P,05 K,O Plowdown .. .... . . . . -Preplant .. .. . . . . . . 135 Starter . . . . . . . . . 12 TOTAL 147 1974 Crop ... . . .. ... . .. . Row Width . .. . . .. . . .. . Planting date .. .. .. . .... . Harvest date .... .. .. . . . . 48 48 Soybeans 38 inches May? Oct.9 24 24 Dlstrlct4U Designations Identifying Brands in the Yield Test Designation Name and Address 30 125 155 50 50 Soybeans 38 inches May8 Oct. I 50 50 •ACCO ...... ... .. . . .. . . ... ACCO Seed Div . of Anderson , Clayton & Co., Belmond, Iowa 50421 Americana . . .. . . . ..... . . .. Teweles Seed Co., Inc .. Muscatine, la. 52761 Asgrow ... . . ............. Asgrow Seed Company, Des Moines , la. 50310 •Cargill .. . . . . ... ... .. . . .... Cargill , Inc ., Minneapolis, Minn . 55402 Corn King ... .... . . . ... ... Malcolm H. Grieve, Pierson, la. 51048 •crows .... .. .. . . . ... .. . ... Crows Hybrid Corn Co., Milford, Ill. 60953 Curry .. .... ... . .. . . ... .. . Curry Seed Co., Elk Point, S.D. 57025 *DeKalb . . .. . . . .... . .... DeKalb Ag. Research , Inc .. DeKalb, Ill . 60115 Farmers . . . .. .. ........ ... Farmers Hybrid Company, Inc .. Hampton, la . 50441 Federal . .. ... . . . . .. .. . ... Federal Hybrids, Marion, la. 52302 Fontanelle .. . . .. .. . .. . .. .. Fontanelle Hybrids. Nickerson, Neb. 68044 F.S . .. .. .. .. . . .. .. . . .. . .. . F.S. Services, Inc. , Bloomington, Ill. 61701 •funks ... . .. . ..... .. . . .... Funk Seeds International, Inc., Bloomington, Ill. 61702 Golden Harvest . . ....... . .. The J .C. Robinson Seed Co., Waterloo, Neb. 68069 Huiting .... . .. . . . .. . . .. . . Huiting Hybrids, Div. of Ferry-Morse, Geneseo, 111 . 61254 Iowa State University . ..... Department of Agronomy, la. State Universi· ty, Ames , la . 50011 Lynks . . .. ... . . . . ... ...... Lynk Bros . & Baird, Inc ., Marshalltown, la. 50158 McAllister . . . ... . .. ... . ... McAllister Seed Farms, Mt. Pleasant, la. 52641 Mccurdy . . .. .. .. . . . . .. .. Mccurdy Seed Co., Fremont, la . 52561 NC+ ... .. . .. . .. . . . ... . .. NC+ Hybrids, Lincoln, Neb. 68504 *Northrup King .. .. . .... . .. Northrup King & Co., Minneapolis, Minn. 55413 •o·s Gold ............. . . . . . o ·s Gold Seed Co., Parkersburg, la . 50665 *PAG . . . . ............. . .... PAG Seeds, Minneapolis , Minn. 55402 *Pioneer . .. .. ... . .. . .. .. . . Pioneer Hi-Bred International, Inc., Des Moines, la. 50308 Schettler .. . . . . .. . ....... . . Schettler Seed Farm, Carroll. la . 51401 Super Crost ....... . ... ... Edward J. Funk & Sons, Inc ., Kentland, Ind. 47951 Tekseed . .. . .. . . . . . ... .... Tekseed Hybrid Co., Tekamah, Neb. 68061 *Trojan . .. .. . ...... . . . . . . . . Trojan Seed Co., Olivia, Minn. 56277 Wilson ... .. . . .. . . .. . . .... . Wilson f{ybrids , Inc ., Harlan , la. 51537 ·widely grown entries made by Iowa State University. Cooperative Extension Service. Iowa State University of Science and Technolo.g y and the United States Department of Agriculture cooperating. Charles E Donhowe. director , Ames. Iowa Distributed in furtherance of the Acts of Congress of May 8 and June 30 , 1914 . TA BL E 2 . AVER ACES OF 19 7 4- 75 ANO 19 7 3-7 5 OF VARI E TI ES TES TED J N D t ST~ J C T 4 U . L SD F OP YIE L CS AQE 8 e u S HEL S FOR 7 3-75 • NO 12 dU SH E L S FCR 74 -7 5 . SPANO V AR Y E T Y FUN KS G4 32 1A S UPER CQ OST 52 7 G OLDEN HARVEST H 24 50 WILSON •ACCO •FUNKS •TROJAN SUPER CQ OS T LYNK S 23 17 UC 3301 G44'44 TX S I 02 4 2 4 2 4 200 T X S 111 HULT ING X770 *NOPTHRU P KIN G PX S OA •PIC NEEA 3 5 17 HULT ING NC+ •NORTHRUP K ING •Pf (NEER •PIONEER MC CURDY •PAG ASGROW WILSCN X9 78 0 57 P X6 1 0 A SX3Q7 3 3 8 8 3 .390 MS X 6 0 sx 7 R X90 160 0 •DEKALB XL6 4 •CAPG ILL 9 3 0 ACCO UC360 1 NORTHRUP KIN G P X7 4 FC~TANELL E s aosc NC CURDY •TROJAN MS X8 4 T XS ll S A NC~ 5 9 HULT ING X~ 7 7 5 GOLDEN HAR VES T H2500 LYNKS 4 3 3 0 FCNTANELL E f llSC 0' 5 GOL D S X55 0 0 A SUPER (ROS T 54 4 0 MCALLI S TER S X7 30 0 WILSON 1040 FUNKS G450 7 GOLDEN H ARV E ST H2655 SUPER CROS T St::7 ACCO UC930 t WIL S CN 2 3 95 AMERI CANA 93 ~0 •T ROJAN T XS 119 o•s GOLD sxssoo NC• as FARMER S 4 589 MC C URDY MSXP B LYNK S 4 5 10 •PAG sx c;a YIEL D BU . / A CROSS 7 3-7 5 74 -75 sx SX sx ,. 5 121 s x 1 3 7 SX I J 4 S X 13 J MS sx sx 1 22 sx 126 sx 126 MS 1 22 3 X 12 l s x 3X sx MS 1 3 8 "' 5 1 28 SX sx 1 29 sx sx sx 1 40 SX 129 S x ll O sx sx SX sx s x 3X 11 7 sx sx SX SX 1 ~ 2 sx SX SX 13 1 sx MS • S sx 1:n MS 3X sx 1 28 SX I 3 1 s x 1 3 4 sx >x s x 13 ~ SX 110 11 e 135 110 1 .33 130 120 11 0 1 27 1 0 7 1 2:! 120 Ill II 7 11 4 11 3 122 l .'.!O? 1 2 0 1 2~ 1 21 1 2 1 II 0 I J3 120 12 0 11 9 127 l ~6 1 2 1 10 8 11 0 1 2 1 1 ~2 12 7 II ~ 11 2 1 2 4 II q 123 11 6 120 1 2~ 122 I 17 11 4 11 0 12' 1 26 1 3 4 131 13 2 OTHER REPORTS MOI S T URE PC T. 74 - 7 5 73- 7 5 2 1. 1 22 . 3 22 .. 5 22 .1 22 . a 22 . e 22 . 9 23 .1 23 . 2 23 . 3 23 .f. 23 .6 23 . e 2 3. e 23 . q 24 . 0 24 . 0 24 o 3 2 4 .4 2 4. 7 25 . 1 25 .. " 25 . 6 25 . 6 25 .7 25 . 7 25 . 8 25 . 8 ?5 . 8 2s .q 25 . ~ 2 '=-9 2 6. 0 2 6. o 26 .1 2 6. 1 2f; .. 2 26 . 3 2 6 . "'i 26 . 6 2 7 .1 2 7. 6 2 7. 8 2 7 . 9 2 1. 9 J o . a :!O . 2 2 1 .o 20 .9 2 0. 9 2 1.1 2 1.6 21 . a 2 1 .6 22 . 2 22 . 4 23 . 5 2 4. I 2 3 . 3 23 .4 2 3.9 23 .9 .:!4. 4 2 6. 3 2 7 .q 2 8. 0 2 1. o 2 8. 5 Separate reports for variety performance are available for each district shown in fig. I . These publications are available at your county extension office or from Publications Dis-tribution, Printing and Publications Building, Iowa State University, Ames, Iowa 50011. The 1975 Iowa Com Yield Test Report: Pm-660-1 District I Pm-660-2 District 2 Pm-660-3 District 3 Pm-660-4U District 4 Upland Pm-660-4B District 4 Bottomland Pm-660-5 District 5 Pm-660-6 District 6 . . . AND JUSTICE FOR ALL Programs and act1v1ties of Cooperative Extension Service are available to all potential chentele without regard to race. color. sex or national origin . Anyone who feels d1sc11minated against should send a complaint within 180 days to the Secretary of Agritulture . Washington. 0.C. 20250. 

The 1975 Iowa Corn Yield Test Report, District 4 Upland

https://dr.lib.iastate.edu/bitstreams/ccd7fe6f-f276-4a61-b59d-91c869c80bd2/download

The 1975 Iowa Corn Yield Test Report, District 4 Upland

Abstract

Similar works

Full text

Available Versions

Digital Repository @ Iowa State University (ISU)