STEEP - Winter Wheat Yields From 1995 On-Farm Tests in Adams County

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Winter Wheat Yields From 1995 On-Farm Tests in Adams County

Jerry Knodel, Tim Smith, Eric Maier, Randy Gust, and Bill Schillinger

Objective

To obtain better information on the performance of winter wheat varieties in low-rainfall dryland areas under actual field conditions.

Location: Several farms in Adams county, Washington
Annual Precipitation: Less than 12 inches
Cropping Pattern: Winter wheat-summer fallow

Treatments

Lewjain, Eltan, Madsen, Rely, Rhode, and Tres were each planted in single drill strips 750 to 2500 feet long at four locations. Winter wheat plots were seeded in September under very dry seed zone conditions. Rainfall during the growing season was 3 inches higher than average.

Data

1995 Grain Yield (bu./acre) From On-Farm Tests in Adams County

Variety Jerry Knodel Tim Smith Eric Maier Randy Gust Average Rank

Eltan

47.9

54.6

58.9

72.6

58.5 a

1

Rely

52.3

57.3

46.5

51.5

51.9 ab

2

Lewjain

35.5

59.9

38.0

63.4

49.2 ab

3

Tres

39.7

52.8

39.6

59.4

47.9 b

4

Rhode

44.8

61.0

37.2

47.5

47.6 b

5

Madsen

36.2

52.5

34.9

63.4

46.7 b

6

LSD (5%)

10.4

CV

9.3%

Conclusion

Eltan produced the highest overall yield. Rely and Lewjain placed in second and third place but were not statistically different from Eltan. Eltan produced significantly more grain than the three lowest yielding varieties: Tres, Rhode, and Madsen. The yield ranking of varieties in 1995 was identical to our 1994 results (note: Rhode replaced Rod in 1995). Funding for this study was generously provided by the Lincoln-Adams Crop Improvement Association.

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Hans Kok, WSU/UI Extension Conservation Tillage Specialist, UI Ag Science 231, PO Box 442339, Moscow, ID 83844 USA Redesigned by Leila Styer, CAHE Computer Resource Unit; Maintained by Debbie Marsh, Dept. of Crop & Soil Sciences, WSU