2005 Winter Elite Wheat Trial

2005 Winter Elite Wheat trial

 

 

Eric P. Eldredge, Clinton C. Shock, and Lamont D. Saunders

Malheur Experiment Station

Oregon State University

Ontario, OR

 

 

Introduction

 

 

Materials and Methods

 

The previous crop was sweet corn. After harvest, the corn stalks were flailed, the field was disked, and the soil was sampled and analyzed. The analysis showed 40 lb nitrogen (N)/acre in the top 2 ft of soil, and in the top foot of soil, 79 lb available phosphate (P2O5), 1,267 lb soluble potash (K2O), and 51 lb sulfate (SO4)/acre, with 3,025 ppm calcium (Ca), 521 ppm magnesium (Mg), 175 ppm sodium (Na), 1.7 ppm zinc (Zn), 9 ppm iron (Fe), 8 ppm manganese (Mn), 0.6 ppm copper (Cu), 0.5 ppm boron (B), pH 7.7, and 3.5 percent organic matter. Preplant fertilizer was broadcast in October, 2004 to apply 50 lb N/acre, 80 lb elemental S/acre, 2 lb Cu/acre, and 2 lb B/acre. The soil was deep ripped, plowed, and ground hogged to prepare the seedbed. The field was corrugated into 30-inch rows.

 

The Winter Elite Wheat Trial was comprised of 38 soft white winter (SWW) wheat cultivars or lines, 4 of which were club types, and 5 with resistance to imazamox herbicide for use in the BASF Clearfield system (designated SWW-CF). One ultra-soft white wheat and one hard white wheat were also included in the trial. Seed of all entries was treated with fungicide and insecticide seed treatment prior to planting. Grain was planted at 30 live seed/ft2, corresponding to a seeding rate of approximately 110 lb/acre. The experimental design was a randomized complete block with three replications. Grain was planted on October 19, 2004, with a small plot grain drill, into plots 5 by 20 ft, and the field was recorrugated. Rainfall on October 19 totaled 0.15 inch, and through the end of October an additional 2.02 inch of rain fell. Emergence was seen on November 11.

 

The trial was irrigated on May 2 for 30 hours. Broadleaf weeds were controlled with Bronate herbicide at 1qt/acre applied on May 20. Urea prills fertilizer to supply 50 lb N/acre was broadcast over the trial on May 24, and the trial was furrow irrigated for 8 hours on May 25.The trial was irrigated for 24 hours on June 8 and again on June 21. Observations of heading date were made from May 21 through May 31. Alleys were cut with a sickle bar mower on June 8. Plant height at maturity was measured in the trial on July 19. The alleys were recut with a Hege plot combine on July 20 and the resulting length of each plot was measured and recorded. The plots were harvested on July 20 with a Hege plot combine. Yield and test weight differences were compared using ANOVA and least significant differences at the 5 percent probability level, LSD (0.05). Differences in yield or test weight between varieties should be equal to or greater than the corresponding LSD (0.05) value before any variety is considered different from another in this trial.

 

Results and Discussion

 

The plants in the Winter Elite Wheat Trial grew well, with grain heads developing in these varieties from May 20 to May 31. Height at maturity ranged from 34 to 42 inches tall. Lodging was observed in only three plots in the first replicate; one plot of 'IDO620' lodged 80 percent, one plot of 'OR9801757' lodged 30 percent, and one plot of 'OR9901619' lodged 10 percent. Test weights in this trial ranged from 60 to 65 lb/bushel.

 

Among the highest yielding wheat varieties were 'BZ6W93-901a' with 152 bu/acre, 'ID92-16004A' with 151, 'Dune' with 149, 'Tubbs' with 147, 'ORH010920' with 147, 'ORH010917' with 147, 'WestBred528' with 146, 'Simon' with 143, 'Mohler' with 143, 'ORH010918' with 143, 'OR941611' with 143, 'Finch' with 142, 'OR2010007-05C' with 141, 'OR9901887' with 140, and 'ID92-22407A' with 140 bu/acre (Table 1). 'Stephens' wheat produced 133 bu/acre.

 

Information on previous wheat trials at Malheur Experiment Station is available on the web at http://cropinfo.net. Information on the performance of the varieties in this trial at other Oregon locations is available on the web at http://cropandsoil.oregonstate.edu/wheat/state_performance_data.htm.

 

 

Table 1. Winter Elite Wheat Trial market class, 50 percent heading date, height at maturity, and yield, Malheur Experiment Station, Oregon State University, Ontario, OR, 2005.

Entry

Origin / developer

Class / traits*

50% heading

Height at maturity

Yield

Test weight

 

 

 

date

inch

bu/acre

lb/bu

BZ6W93-901a

WestBred

SWW

5/26

40

152.2

64.1

ID92-16004A

U of I

SWW

5/27

39

151.0

62.1

Dune

U of I

SWW

5/23

36

149.4

64.1

Tubbs

OSU

SWW

5/26

40

147.0

62.3

ORH010920

OSU

SWW

5/21

35

146.9

62.6

ORH010917

OSU

SWW

5/23

37

146.7

61.8

WestBred528

WestBred

SWW

5/22

37

145.5

62.8

Simon

U of I

SWW

5/27

39

143.4

62.9

Mohler

WestBred

SWW

5/25

39

143.4

62.9

ORH010918

OSU

SWW

5/23

35

143.2

63.1

OR941611

OSU

SWW

5/26

40

142.7

63.0

Finch

ARS-WSU

Club

5/30

42

141.5

64.7

OR2010007-05C

OSU

SWW-CF

5/27

40

141.1

61.8

OR9901887

OSU

SWW

5/27

40

140.4

63.2

ID92-22407A

U of I

SWW

5/28

37

140.1

62.8

ORSS-1757

OSU

SWW

5/26

39

138.3

63.7

IDO587CL

U of I

SWW-CF

5/24

38

138.2

N/A

ORI202183C

OSU

SWW-CF

5/27

39

138.2

62.2

ORH011481

OSU

SWW

5/20

34

137.5

62.1

ORCF-102

OSU

SWW-CF

5/28

40

135.6

63.3

ORH010085

OSU

SWW

5/26

37

134.5

N/A

ORH012183

OSU

SWW

5/24

36

134.4

64.5

Coda

ARS-WSU

Club

5/30

42

133.9

63.5

ORH010083

OSU

SWW

5/26

38

133.8

62.9

OR3970965

OSU

SWW

5/29

41

133.6

62.2

OR2010239

OSU

SWW

5/26

39

133.2

62.5

Stephens

OSU

SWW

5/25

38

133.1

62.3

OR9900553

OSU

SWW

5/28

38

132.6

63.6

Masami

WSU

SWW

5/31

42

132.5

62.6

OR2010241

OSU

SWW

5/27

39

131.8

62.7

OR9901619

OSU

SWW

5/30

42

130.9

61.0

Madsen

ARS-WSU

SWW

5/27

39

129.9

62.8

ORCF-101

OSU

SWW-CF

5/27

38

129.1

62.8

Brundage96

U of I

SWW

5/26

37

129.0

62.0

Gene

OSU

SWW

5/26

34

128.2

60.0

Rod

WSU

SWW

5/26

41

127.5

62.6

Weatherford

OSU

SWW

5/29

39

127.0

62.7

ARS99123

ARS-WSU

Club

5/22

40

120.1

62.1

Chukar

ARS-WSU

Club

5/30

42

116.6

61.9

IDO620

U of I

HWW

5/30

42

107.1

63.1

Mean

 

 

5/26

39

136.0

62.7

LSD (0.05) 

 

 

 

 

12.7

2.0

*SWW = Soft White Winter, SWW-CF = Soft White Winter with resistance to imazamox herbicide.

60-lb bushel.

Ultra-soft white winter wheat.

N/A = Test weights were not available.

Least Significant Difference at alpha P ≤ 0.05.