1965 Corn Performance Trials

Transcription

1 South Dakota State University Open PRAIRIE: Open Public Research Access Institutional Repository and Information Exchange Agricultural Experiment Station Circulars SDSU Agricultural Experiment Station Corn Performance Trials J. J. Bonnemann South Dakota State University Follow this and additional works at: Recommended Citation Bonnemann, J. J., "965 Corn Performance Trials" (966). Agricultural Experiment Station Circulars. Paper. This Circular is brought to you for free and open access by the SDSU Agricultural Experiment Station at Open PRAIRIE: Open Public Research Access Institutional Repository and Information Exchange. It has been accepted for inclusion in Agricultural Experiment Station Circulars by an authorized administrator of Open PRAIRIE: Open Public Research Access Institutional Repository and Information Exchange. For more information, please contact

2 CIRCULAR 74 JANUARY Corn Performance Trials AGRONOMY DEPARTMENT AGRICULTURAL EXPERIMENT STATION SOUTH DAKOTA STATE UNIVERSITY, BROOKINGS

3 South Dakota Corn Performance Trials J. J. Bonnemann, Assistant Agronomist Agricultural Experiment Station South Dakota State University Brookings, South Dakota The trials reported in this circular have been conducted under the supervision of the Crop Performance Testing Activity, Agricultural Experiment Station since 96. Records of performance of the corn hybrids harvested in 965 are presented as well as two-, three-, four- and five-year averages of yield and moisture percentages, where available. The primary purpose of the tests is to supply interested individuals with information on the relative performance of the hybrids entered, when grown under similar environmental conditions. Information in the following tables includes acre grain yield in bushels, moisture percentage of either ear or shelled corn at harvest, performance score and other related information. When choosing hybrids for use in this state one should refer to the trials conducted nearest to the area in which the hybrid is to be planted. Location of the 965 Trials The trials were planted in the crop adaptation areas marked on the South Dakota map, page 7. The exact location of each trial, its soil type and date of seeding and harvesting are given in Table. Soil samples were taken at seeding time and the laboratory results are presented in Table. Weather and Climatic Conditions Table 3 shows the climatic data for the 965 growing season at each test site based upon reports of Monthly Climatological Data, U. S. Department of Commerce and the supervisor of the Northeast Research Farm at Watertown. The D4 trial was within l miles of the recording location east of Parkston. Every reporting station had recorded temperatures below freezing by September 4. Adapted varieties would not usually be expected to suffer from below freezing temperatures by this date. However, very wet conditions delayed planting and below normal temperatures in May and early June prevented rapid spring growth. This, coupled with a dry August and a wet September, found even adapted varieties far from being physiologically mature. Following the freeze, even the corn that was near maturity failed to dry as rapidly as might normally be expected. Much of the corn in the state was harvested at high levels of moisture and mechanically dried before being stored. The assistance of D. B. Shank, D. w. Beatty and Station Supervisors Albert Dittman, Lloyd Dye, Quentin Kingsley, Herb Lund, Jake Frederikson and Lenis Nelson is gratefully acknowledged. The help of Willard Konrad and Floyd Dimick, Off-station cooperators, is also appreciated.

4 -3- TABLE. LOCATION AND SOIL TYPES OF THE 965 CORN PERFORMANCE TRIALS District County Location Post office Planted Harvested Area 8 McPherson North Central Substation Eureka May Oct. Cl Spink Redfield Devel. Farm, 6E Redfield May Oct. C Charles Mix Floyd Dimick, 3E Acadamy May 8..,; D Codington NE Research Farm, 5N Watertown May Oct. 8 D3 Brookings Agronomy Farm Brookings May 8 Oct. 6 D4 Hutchinson Willard Konrad, 4E, ls Parkston May 7 Oct. - E Clay SE Research Farm, 6W, Beresford May 4 Oct. Soil type 8 Williams loam Cl Boetia-Harmony silty clay loam D Kranzburg silt loam D3 Vienna loam Houdek loam E Kranzburg silty clay loam D ' hailed out on June 8 The trial planted in Charles Mix county received severe hail damage on June 8 and was not harvested. Moisture stress and several days of extremely high ( ) temperature caused severe setbacks to some entries in other trials, this being dependent upon the entries stage of growth when these conditions were most severe. Hybrid Entry Procedure Hybrids entered are chosen by the participating commercial concerns and they designate the locations where their entries are to be tested. Only hybrids that had been registered with the South Dakota Department of Agriculture prior to February, 965, were eligible for entry. A nominal fee was charged for each entry in each area except for entries included by Experiment Station personnel. Either closed or openpedigree hybrids were eligible and each was allowed to be entered only once in each area. A listing of the entries and the areas in which they were planted is included in Table 6. TABLE. LABORATORY RESULTS OF SOIL SAMPLES TAKEN AT TIME OF SEEDING 965 CORN TRIALS Area County Texture %. M. p K ph lbsi'.'.a B McPherson loam Cl Spink silt loam D Codington silt loam D4 Hutchinson loam. 7. E Clay silt loam

5 TABLE 3. PRECIPITATION AND TEMPERATURE FOR THE 965 CORN GROWING SEASON OF SOUTH DAKOTA -4- Location and district Month Precipitation, inches Departure Total Month from departure total normal Temperature in degrees F. Departure Month mean from Average temp. normal departure Eureka Area B Redfield 6E Area Cl NE Farm 5N Area D Brookings le Area D3 Parkston SE Area D4 SE Farm Area E May June July Aug. Sept. Oct Last freeze 3 - May 8 May June July.68 Aug.. Sept Oct Last freeze 7 - May 8 May 6.8 June 3.66 July.34 Aug..63 Sept Oct Last freeze 7 May 5.6 June 4. 4 July.89 Aug.. Sept. 5. Oct May Last freeze 3 - May 8 May 4.77 June July Aug Sept Oct Last freeze 3 - May 8 May 6. June 6.87 July. 99 Aug. 3.6 Sept Oct Last freeze 3 - May First frost 9 - Sept First First First First frost 3 - Sept. 4 frost 9 - Sept frost 9 - Sept. 4 frost 6 - Sept. 4 First frost 8 - Sept. 4

6 -5- Experimental Procedure The entries included in each test were planted in five or six replications. One replication was planted for public observation and no data were taken from this area. Plots of individual hybrid entries were located at random within each replication. Available space, soil type and other related factors determined the plot size. All plots were two rows wide. The Area Cl, C and D4 trials were planted as drilled corn to conform with farm practices. The remaining trial sites were hill planted. Drilled plots were eighter or 7 feet long depending upon the total number of replications. The B trials were 6 hills deep in 4-inch rows. The D and D3 trials were hills deep in 4-inch rows. The E trial was 8 hills deep in 4-inch rows. The seeding rates were approximately equivalent to the following kenels per acre: B, 7,; Cl,,75; C,,; D and D3,,75; D4, 3,6 and E, 5,7. Corn rootworm infestations were not as heavy in 965 as in 964 but at the three trials where damage was serious in 964, one of several currently recommended insecticides was applied. The choice was that of the operator and the availability of the product in his area. Atrazine was applied to the D3 and E trials for grassy weed control. The test plots were hand picked separately and the ear corn weighed. Samples for moisture determination were taken from three replications of the plots. Moisture percentages were determined on ear corn at all locations except Areas D3 and E where moisture percentages were determined on shelled corn. The ear corn moisture samples were weighed, oven dried for 7 hours at C. in the laboratory, reweighed and the moisture percentages determined. A minimum of randomly selected ears from each plot were shelled in the field at the D3 and E sites, returned to the Main Station in sealed polyethylene bags and the moisture percentages determined with an electronic moisture tester. Measurements of Performance Yield. In each test the yield reported for each hybrid is the average obtained from field weights of all replications, expressed as bushels per acre of No. corn at 5.5 percent moisture. Varieties of equal potential may yield differently because of variations in slope, soil fertility and stand. Mathematical determinations have been made to ascertain whether yield differences obtained were caused by variations in the environment or were true varietal differences. If the trials were found to have statistically significant differences between mean yields at the five-percent level, Duncan s Multiple Range Test was run on the means. In the interpretation of Duncan's Test, those mean yields accompanied by the same lower case letter under the Statistical Significance column in the table are not considered to be statistically different in yield. As an example of Duncan's Test, note in Table 4 that the varieties SD Exp. 39, SD and down through SD and DeKalb XL-3 are accompanied by the same lower case letter "a". These ten varieties in descending order are not statistically different in yield. All other varieties below DeKalb XL-3 are significantly lower in yield than SD Exp. 39. These statements are true only for this trial under conditions tlat prevailed during the 965 cropping season. Average results from three or more years at the same location present the best picture of true yield differences.

7 -6- Moisture Content. The moisture content of each entry at harvest time is expressed as the percent moisture in either the ear corn or the shelled corn. It was intended that the moisture percentages be determined on shelled corn in 965 but excessive moisture in some trials prevented use of the moisture meter and it was necessary to revert to the former procedure of sectioning ear con. Moisture content is inversely related to maturity and, because maturity is of prime consideration in South Dakota, these figures are very important when evaluating entries. Performance Rating. For efficient and economic operation of a farm avoidable delays should be held to a minimum. Delaying the harvest and additional drying costs can be reduced if an operator can produce sound, dry corn. Grain yield and moisture percentages are of prime importance. Because of the importance of these two factors, the two primary results obtained in these trials are used to determine this rating. In each test yields were converted to percentages by comparing them with the average yield of that test. Similar calculations were made for moisture at harvest time after first subtracting moisture content from so that the varieties would be ranked according to their ability to produce sound, rather than soft corn. The performance rankings that appear in the tables were calculated as follows: (Yield percentage x 6) plus (moisture percentage x 4) Stand. At least two possibilities may be indicated when missing hills occur: seed of an entry was unable to produce a good stand under the environmental conditions prevailing for the trial, or something destroyed the young plants. Because this work is designed primarily to test the yield potential of the varieties, corrections in yield were made for missing hills according to the formula: CW= FW f H -.3M) H - M ) where; CW - corrected weight, FW - field weight, H - number of hills planted per plot, and M - number of hills missing. No corrections were attempted for drilled plantings or for minor stand variations, that is fewer than three stalks per hill. Lodging. Root lodging and stalk breakage were variable during 965. Where lodging or breakage was serious and a probable deterrent to higher yields and ease of harvesting, the percentages are shown in the tables. Root lodging was minor at most locations. Stalk lodging and ear droppage were increased by high velocity winds in early October. All percentages reported are calculated as the average of ears dropped or of plants lodged or broken per plot. R.L. or S.B. in the tables indicates the plants Root Lodged or Stalks Broken. E.D. denotes the percentage of Ears Dropped. Use of the Tables. South Dakota conditions are generally quite different than in the mid-western corn belt. Many of the crop-adaptation areas have conditions common to the northern plains; limited frost-free growing periods, limited precipitation and high temperatures. Corn hybrids that yield satisfactorily and produce corn that can be stored without additional costly handling are desirable. The performance score provides information on both these factors in a weighted fashion. In choosing a hybrid, first che k those yielding best. Then look for the entries with below average moisture. Having done this, compare those that are above average in yield and below average in moisture. The results will generally be similar to that calculated by the performance score.

8 Maturity, yield, quality and standability all merit consideration when buying seed corn. It is sound practice to plant more than one hybrid. When planting a new hybrid the acreage should be limited until its adaptability to the environment on the particular farm is known. -7- >IAROIN(i PERKINS CORSON MC PHERSON BROWN x EDMUNDS Bl ZIEBACH DEWEY Cl B,.YOE FAULK SPINK x BEADLE B3 JONES BENNETT B4 x 965 TR I AL SITES

9 TABLE 4. CORN PERFORMANCE TRAIL, AREA 8, NORTH CENTRAL SUBSTATION, EUREKA, Perfor- Percent Variety ma nee Percent Yield, moisture Statistical rating R.L. S. B. bu/ac ear corn Significance SD Exp 39 ( 4x) l a SD (4x) ab Master F-5 ( 4x) abc Sokota 5 ( 4x) abc DeKalb XL-34 (3x) abc DeKalb 'L-37 (3x) abed SD 48 (3x) abed DeKalb XL-35 (3x) abcde SD ( 4x) abcdef DeKalb XL-3 (3x) abcdef Sokota TS-5 (x) bcdefg SD Exp 44 (4x) bcdefgh Pioneer 39 (4x) bcdefgh Pioneer 386 (4x) bcdefgh Master F-9 (4x) bcdefgh Pioneer 388 (4x) bcdefgh SD Exp 43 ( 4x) bcdefgh Pioneer 3854 (4x) bcdefghi SD 4 ( 4x) cdefghi Pioneer 38 (4x) cdefghi 7 Master F-3A (4x) cdefghi Northrup-King KE 435 ( 4x) defghij DeKalb 45 ( 4x) efghij Master F-3 (4x) efghij Pioneer 385 (4x) fghij Pioneer 384 ( 4x) ghij SD 5 ( 4x) hij DeKalb 59 ( 4x) ij Master FX-35 (3x) j Mean CV-6. 9%

10 -9- TABLE 5. TWO-, THREE-, AND FOUR-YEAR YIELD AND MOISTURE PERCENTAGE AVERAGES OF HYBRIDS ENTERED IN THE AREA B TRIAL, Variety Yield bushels er acre Percent moisture DeKalb 45 Master F-5 Master F-3 Master F-3A N-K KE Pioneer 38 Pioneer Pioneer Pioneer Pioneer Pioneer Pioneer Sokota SD SD SD SD o SD Exp SD Exp

11 -- TABLE 6. AREA D CORN PERFORMANCE TRIAL, NORTHEAST RESEARCH FARM, WATERTOWN, 965 Perfor- Variety mance Percent rating R.L. S.B. Yield, bu/ac Percent moisture ear corn Statistical significance SD Exp 48 ( 4x) Pioneer 386 (4x) SD Exp 39 (4x) Sokota 5 (4x) DeKalb XL-35 (3x) a ab abc abed abed I) I I' ' Sokota TS-5 (x) Master F-3 (4x) SD Exp 55 ( 4x) Pioneer 388 ( 4x) Pioneer 38 (4x) abcde abcde abcde abcde abcde SD 48 ( 3x) DeKalb XL-37 (3x) DeKalb XL-34 (3x) Pioneer 3854 (4x) Pioneer 368 (4x) abcde abcde abcde be def be def Northrup-King PX 487 (3x) SD ( 4x) 6 SD ( 4x) 9 DeKalb XL-3 (3x) DeKalb 59 (4x) cdefg defgh defgh defgh defgh Master F-66 (4x) Northrup-King PX 48 (3x) 9 Master F-34 (4x) 4 Sokota 55 (4x) 5 Pioneer 384 (4x) \l defghi defghi defghi defghi defghi Master F-7 (4x) 3 Master F-3A ( 4x) 6 Northrup-King KE 449 (4x) 7 Northrup-King KE 497 (4x) 3 SD 4 (4x) defghi efghi fghij fghij ghijk Pioneer 385 ( 4x) Master FX-45 (3x) DeKalb 45 ( 4x) United-Hagie Xl6 (x) hijk ijk jkl jkl Master FX-35 (3x) United-Hagie Xl38B (x) United-Hagie Xl3 (x) Pioneer 367 (4x) Mean kl CV-5.9%

12 I -- TABLE 7. TWO-, THREE-, FOUR-, AND FIVE-YEAR AVERAGE YIELD AND MOISTURE PERCENTAGE AVERAGES OF HYBRIDS ENTERED IN THE AREA D TRIAL, Yields, bushels eer acre Percent moisture Variety DeKalb Master F Master F-3A Master F Master F Northrup-King KE Northrup-King KE Northrup-King PX Northrup-King PX Pioneer Pioneer Pioneer Pioneer Pioneer Pioneer Pioneer Sokota o Sokota Sokota TS SD SD SD SD SD Exp

13 TABLE 8. AREA D3 CORN PERFORMANCE TRIAL, AGRONOMY FARM, BROOKINGS, Perfor- Variety ma nee Percent Yield, Percent Statistical rating R. L. S. B. E. D. bu/ac moisture significance United-Hagie Xl38B ( x) a SD Exp 53 (3x) a Pioneer 368 (4x) ab Sokota TS-5 (x) abc Pioneer 385 (4x) abed Pioneer 3775 ( x) abcde DeKalb XL-45 ( x) abcdef SD 48 (3x) abcdefg SD Exp 54 (4x) abcdefgh DeKalb XL-35 (3x) bcdefghi Pioneer 376 ( 4x) bcdefghi Pioneer 36 (4x) bcdefghij DeKalb 59 ( 4x) cdefghij Master FX-5 (3x) cdefghijk Northrup-King KE 497 ( 4x) defghij k Pioneer 3658 ( 4x) defghijk Northrup-King PX 487 (3x) defghij k Pioneer 368-A (4x) defghij k DeKalb 4 ( 4x) defghijk United-Hagie Xl3 (x) efghij k United-Hagie Xl6 (x) efghij k Minn. 55 ( 4x) efghij k Master FX-45 (3x) fghijkl Master F-34 (4x) fghijkl Northrup-King KM 567 ( 4x) ghij kl Disco (4x) ghijkl Sokota SK-65 (3x) ghijkl Minn. 33 (3x) ghijkl De Kalb XL-3 5 (3x) hijkl Disco 3 (4x) hijkl Master F-7 (4x) hijkl Master F-8 (4x) hijkl DeKalb ( 4x) hijkl Disco -A (4x) l ijkl United-Hagie Xl9A (x) ijkl Northrup-King KM 555 (4x) ijkl SD 5 ( 4x) ijkl Pioneer 367 (4x) ij kl Northrup-King PX 48 (3x) ijkl Sokota 55 (4x) ijkl Minn. 59 ( 4x) ijkl SD Exp 56 (3x) jkl United-Hagie 3H3 (3x) Sokota 47 ( 4x) C\-7.% kl Mean

14 -3- TABLE 9. TWO-, THREE-, FOUR-, AND FIVE-YEAR YIELD AND MOISTURE PERCENTAGE AVERAGES OF HYBRIDS ENTERED IN TrIB AREA D3 TRIAL FROM Yield, bushels eer acre Percent moisture Variety DeKalb DeKalb DeKalb DeKalb >-.'L DeKalb XL Disco A Disco Master F Master F Master F Minn Minn Minn Northrup-King KE Northrup-King KM Northrup-King KM Northrup-King PX Northrup-King PX Pioneer Pioneer Pioneer Pioneer 368-A Pioneer Pioneer Pioneer Sokota Sokota Sokota TS United-Hagie Xl United-Hagie Xl United-Hagie Xl38B SD SD

15 -4- TABLE. AREA D4 CORN PERFORMANCE TRIAL, WILLARD KONRAD FARM, PARKSTON, Perfor- Percent Variety ma nee Percent Yield, moisture Statistical rating R.L. S. B. bul'.'.ac ear corn significance DeKalb XL-34 (3x) a Pioneer 39 (4x) a Pioneer 36 (4x) ab Pioneer 3465 (4x) abc Pioneer 344 (4x) abed Sokota 63 (4x) 6 8. abcde SD Exp 45 ( 4x) abcdef DeKalb XL-35 (3x) abcdef DeKalb XL-45 (x) abcdef Master F- (4x) abcdefg Northrup-King PX 66 ( x) abcdefgh Pioneer 3558 ( x) abcdefgh Nebr. ( 4x) abcdefgh Green Acres XlOOl ( 4x) abcdefgh Disco 5 (4x) abcdefghi Green Acres Xl3 ( 4x) abcdefghij Pioneer 35 ( x) abcdefghij DeKalb XL-346 (3x) abcdefghij SD 6 (4x) abcdefghij Master F-8 ( 4x) abcdefghij Master FX-5 (3x) abcdefghij 4 Hinn bcdefghij k Northrup-King KT 63 ( 4x) bcdefghijk Iowa 563 ( 4x) bcdefghij k Sokota MS 75 (x) cdefghijk Nebr. 5D (4x) cdefghijk Pioneer 38 ( 4x) cdefghijk Sokota 65 ( 4x) cdefghij k DeKalb 45A ( 4x) cdefghij k Disco 9 (4x) defghij k Sokota 463 (4x) defghij k Pioneer 348 (4x) defghijk Master F-7 (4x) defghijk Northrup-King KT 63A ( 4x) efghijk Master FX-45 (3x) fghij k Disco -A ( 4x) ghijk Master F-9 (4x) ghijk DeKalb 44 ( 4x) ghijk Northrup-King KM 589 ( 4x) hijk Minn. 55 (4x) ijk Minn. 59 ( 4x) jk SD Exp 46 ( 4x) k Mean CV-%

16 -5- TABLE. TWO-, THREE-, AND FOUR-YEAR YIELD AND MOISTURE PERCENTAGE AVERAGES OF HYBRIDS ENTERED IN THE AREA D4 TRIAL FROM Yield, bushels ier acre Percent moisture Variety DeKalb 45A DeKalb DeKalb XL Disco -A Disco Iowa Master F Minn Minn Minn Nebr Northrup-King KM Northrup-King KT Northrup-King KT 63A Northrup-King PX Pioneer Pioneer Pioneer Pioneer Pioneer Pioneer Pioneer Sakata Sakata Sakata MS o SD Exp SD Exp

17 TABLE. AREA E CORN PERFORMANCE TRIAL, SOUTHEAST RESEARCH FARM, BERESFORD, Perfor- Variety ma nee Percent Yield, Percent Statistical rating R. L. S. B. E. D. bul'.'.'.ac moisture significance Pioneer 344 (4x) a United-Hagie UH Xl47 ( x) ab Pioneer 35 (x) abc DeKalb XL-36 (3x) abed Northrup-King PX 66 ( x) bcde SD Exp 45 ( 4x) cdef Pioneer 36 (4x) cdef Pioneer 3558 (x) defg Pioneer 39 (4x) defgh Pfister FAG SX 9 ( x) defghi DeKalb 44A ( 4x) defghij United-Hagie UH Xl4 ( x) defghij DeKalb XL-65 (x) defghij Northrup-King KT 63 (4x) efghijk United-Hagie UH Xl5A (x) efghijk Pioneer 38 (4x) efghijkl DeKalb XL-45 (x) efghijklm United-Hagie UH 58 ( x) efghijklm 43 Sokota MS 75 ( x) efghijklm Pioneer 348 (4x) efghijklm DeKalb 44 (4x) efghij klm Sokota 63 (4x) efghijklm Pfister FAG SX 66 ( x) efghijklmn SD Exp 46 ( 4x) efghijklmn United-Hagie UH 5 ( x) efghijklmn Disco -AA (4x) efghijklmn Disco -A (4x) efghijklmn Nebr. ( 4x) efghijklmn DeKalb XL-36 (3x) efghijklmn Nebr. 5D ( 4x) efghijklmn Pioneer 336 (x) efghijklmn Sokota 65 (4x) fghijklmn Green Acres 46 (4x) fghijklmn Northrup-King KM 589 ( 4x) ghijklmn Minn. 47 ( 4x) ghij klmn SD 64 ( 4x) hij klmn Northrup-King KT 63A (4x) hijklmn Disco 5-A (4x) ijklmn Green Acres XlOOO (4x) ijklmn Master F-9 (4x) ijklmn United-Hagie UH 58 (x) ij klmn Pfister FAG 7 (3x) ij klmn Continued next page 39

18 TABLE (Continued) -7- Perfor- Variety mance Percent rating R.L. S.B. E.D. Yield, Percent Statistical bu/ac moisture significance Pfister PAG 7 (4x) ij klmn Disco 9 (4x) Pfister PAG 393 (3x) Green Acres XlOOl (4x) Sakata 675 (4x) Pfister PAG 348 (4x) ij klmn ij klmn jklmn jklmn jklmn Master FX-5 (3x) Minn. 3 (3x) Master F- (4x) SD 6 ( 4x) Iowa 563 ( 4x) Mean klmn lmn lmn mn n CV-5.5% TABLE 3. TWO-, THREE-, FOUR-, AND FIVE-YEAR YIELD AND MOISTURE PERCENTAGE AVERAGES OF HYBRIDS ENTERED IN Trill AREA E TRIAL, Yield, bushels per acre Percent moisture Variety DeKalb 44 DeKalb 44A DeKalb XL-65 DeKalb XL-36 DeKalb XL-36 Disco 9 Disco -A.4 Iowa 563 Minn. 3 Minn. 47 Nebr. Northrup-King KM 589 Northrup-King KT 63 Northrup-King PX 66 Pioneer Pioneer 39 Pioneer 336 Pioneer 344 Pioneer 348 Pioneer 3558 Sakata MS-75 United-Hagie Xl47 United-Hagie Xl5 A United-Hagie UH58 United-Hagie UH5 United-Hagie UH58 SD SD SD Exp

19 -8- TABLE l4. AREA Cl CORN PERFORMANCE TRIAL, REDFIELD DEVELOPMENT FARM, REDFIELD, 965 Perfor- Percent Variety ma nee Percent Yield, moisture Statistical rating R.L. S. L. bu/ac ear corn significance Pioneer 3854 (4x) a Pioneer 385 ( 4x) ab Pioneer 38 (4x) abc DeKalb XL-34 (3x) abed Sakata TS-5 (x) abcde SD Exp 47 ( 4x) abcdef SD 48 (3x) abcdef SD Exp 39 ( 4x) abcdef Master F-7 (4x) bcdef Pioneer 368-A (4x) bcdefg Sakata SK-65 (3x) 7. bcdefg Pioneer 3775 (x) bcdefg SD ( 4x) bcdefgh SD Exp 48 ( 4x) bcdefgh DeKalb XL-35 (3x) bcdefgh SD 4 ( 4x) bcdefgh DeKalb XL-38 (3x) bcdefgh Northrup-King PX 487 (3x) bcdefgh Pioneer 368 (4x) bcdefgh Pioneer 36 (4x) cdefgh SD 5 ( 4x) cdefgh DeKalb XL-3 (3x) cdefgh Master F-66 (4x) cdefgh DeKalb 59 ( 4x) cdefgh Northrup-King KE 449 ( 4x) cdefgh Master FX-35 (3x) cdefgh Pioneer 367 (4x) defgh SD 7 ( 4x) defgh Master F-3 ( 4x) efgh DeKalb XL-37 (3x) fgh Master F-3lA (4x) fgh Sakata 47-A (4x) gh Sakata 47 ( 4x) h Sakata 463 ( 4x) h Mean CV-8. % 37. 3

20 -9- TABLE 5. TWO-YEAR YIELD AND MOISTURE PERCENTAGE AVERAGES OF THE HYBRIDS ENTERED IN THE AREA Cl TRIAL, Variety Yield, bu/ac Percent moisture DeKalb XL DeKalb XL Master F Master F-3A Master F Northrup-King KE Pioneer Pioneer Pioneer 368-A Pioneer Pioneer Pioneer Pioneer Sokota Sokota 47A Sokota Sokota TS SD SD SD SD SD SD Exp

21 TABLE 6. THE CORN HYBRIDS ENTERED FOR TEST IN THE 965 CORN PERFORMANCE TRIALS AND THE TABLES IN WHICH THE RE SULTS APPEAR VARIETY TABLE VARIETY TABLE VARIETY TABLE VARIETY TABLE DEKALB 45 4,5,6 MASTER F-5 4 PFISTER PAG 7 SOKOTA 65,, DEKALB 59 4,6,7,8,9 MASTER F-9 4 PFISTER PAG 7 SOKOTA 675 DEKALB 8,9 MASTER F-3 4,5,6,7,4 PFISTER PAG 348 SOKOTA TS-SO 4,6,7,8,9,4 DEKALB 4 8,9 MASTER F-3A 4,5,6,7,4 PFISTER PAG 393 SOKOTA SK-65 8,4 DEKALB 45A, PFISTER PAG SX 9 SOKOTA MS-75,,,3 MASTER F-34 8,9,, PFISTER PAG SX 66 DEKALB 44,,,3 MASTER F-66 6,4 UNITED-HAGIE 3H3 8 DEKALB 44A,3 MASTER F-7 6,7,8,9,,4 PIONEER 36 UNITED-HAGIE 58,3 DEKALB XL-45 8,9,,ll, MASTER F-8 8,9,, PIONEER 38,,,3 UNITED-HAGIE 5,3 DEKALB XL-65,3 PIONEER 39,,,3 UNITED-HAGIE 58,3 DEKALB XL-3 4,6,4 MASTER F-9, PIONEER 336,3 UNITED-HAGIE Xl6 6,8,9 MASTER F-, PIONEER 344,,,3 UNITED-HAGIE Xl9A 8 DEKALB XL-34 4,6 MASTER FX-35 4,6,8 PIONEER 348,ll,,3 DEKALB XL-37 4,6,4 MASTER FX-45 6,8, UNITED-HAGIE Xl3 6,8,9 DEKALB XL-38 4 MASTER FX-5 8,, PIONEER 3465 UNITED-HAGIE Xl38B 6,8,9 DEKALB XL-35 4,6,8,4 PIONEER 35,, UNITED-HAGIE Xl4 DEKALB XL-35 8,9, MINN. 3,3 PIONEER 3558,,,3 UNITED-HAGIE Xl47,3 I "" MINN. 33 8,9,, PIONEER 36, UNITED-HAGIE Xl5 A,3 I DEKALB XL-34 MINN. 47,3 PIONEER 36 8,9,4 DEKALB XL-346 MINN. 55 8,9,, PIONEER ,9 SD 4,5,6,7 DEKALB XL-36,3 MINN. 59 8,9,, SD 4,5,6,7,4,5 DEKALB XL-36,3 PIONEER 367 6,8,4 SD 4 4,5,6,7,4,5 NEBR.,ll,,3 PIONEER 368 6,7,8,9 SD 48 4,6,7,8,9,4,l5 DISCO -A 8,9 NEBR. 5D, PIONEER 368-A 8,9,4 DISCO -AA 8,9 PIONEER 376 8,9 SD 5 4,5,8,9,4,5 DISCO -A,,,3 NORTHRUP-KING KE 435 PIONEER ,9,4 SD 7 4,5 DISCO 5-A NORTHRUP-KING KE 449 6,7,4,5 PIONEER 38 4,5,6,7,4 SD 64,3 NORTHRUP-KING KE 497 6,7,8,9 SD 6,,3 DISCO 8 NORTHRUP-KING KM 555 8,9 PIONEER 384 4,5,6,7 DISCO 3 8,9 PIONEER 385 4,S,6,7,8,9,l4 SD EXP 39 4,6,7,4 DISCO 5 NORTHRUP-KING KM 567 8,9 PIONEER ,5,6,7,4 SD EXP 43 4,5 DISCO 9,,,3 NORTHRUP-KING KM 589,ll,,3 PIONEER 386 4,5,6,7 SD EXP 44 NORTHRUP-KING KT 63,ll,,3 PIONEER 388 4,5,6,7 SD EXP 45,,, 3 GREEN ACRES 46 NORTHRUP-KING KT 63A,, PIONEER 39 4,5 SD EXP 46,,,3 GREEN ACRES XlOOO SD EXP 47 4,5 GREEN ACRES XlOOl, NORTHRUP-KING PX 66,ll,,3 SOKOTA 5 4,5,6,7 GREEN ACRES Xl3 NORTHRUP-KING PX 48 6,7,8,9 SOKOTA 55 6,7,8,9 SD EXP 48 6,4 NORTHRUP-KING PX 487 6,7,8, 9,4 SOKOTA 47 8,9,4 SD EXP 5 8 IOWA 563,,,3 SOKOTA 47-A 4 SD EXP 53 8 SOKOTA 463,,4 SD EXP 54 8 SOKOTA 63, SD EXP ,5 4,5