Pendleton Continuous Cereals

This experiment has been added by the GLTEN Curators using existing published sources.
Local identifier
CW
Years operational
1931—
Objective
The experiment was originally established to determine the feasibility of annual cropping of winter wheat in a low rainfall region. In 1982 it was modified to include three cereals: winter wheat, spring wheat, and spring barley. The experiment has since been modified to include tillage and fertility treatments to evaluate their impacts on soil and crop productivity.
Description
This experiment currently serves as a cereal monoculture baseline for comparing other crop rotations, all under conventional tillage.
Data Access Statement
Don't know
Data license
Don't know
Data policy
Don't know
Organization
Columbia Basin Agricultural Research Center, University of Oregon
People

Site: Continuous Cereal plots

Local code
CW
Location
Pendleton
Oregon
USA
Geographic location
45.7196877648106, -118.625418420821
+−
© OpenStreetMap contributors
Elevation
455 Metres
Visits permitted?
No
Management
Plots are moldboard ploughed prior to seeding and receive chemical and mechanical weed control. P and S fertilizers are applied periodically.
Soil description
Soils are coarse silty mixed mesic Typic Haploxerolls
Climate properties
VariableTime periodValue (range)Units
precipitation420 millimeter
air temperature10 (-1 – 21) degree Celsius

Design period: Period 1 (1931—1981)

Design Type
Other
Description
The original experiment consisted of three adjacent sites, two measuring 86 x 92.6m and cropped to winter wheat and one 40.2 by 92.6m cropped to spring wheat. Each site was split into 8 plots. The plots received no fertilizer from 1931 to 1943, different rates of N (0 to 150 lb N acre-1 yr -1) from 1943 to 1951, no fertilizer from 1952 to 1959, and 80 ± 10 lb N acre-1 after 1960. In 1977 a portion of one of the winter wheat sites and the spring wheat site were abandoned. Part of the second winter wheat site was converted to spring wheat. The cereal crops are each grown in the same location every year.
Number of plots
3
Number of subplots
24
Number of harvests per year
1
Crops
CropYears grown
winter wheat
spring wheat
Crop Rotations
continuous winter wheat
  • 1
    winter wheat
continuous spring wheat
  • 1
    spring wheat
    In 1977 the original spring wheat site was abandoned and one of the winter wheat sites was converted spring barley.
Measurement
VariableMaterialUnitsFrequencyScaleComment
grain yield traitNot specified

Design period: Period 2 (1982—1995)

Design Type
Other
Design description
The spring wheat site was split in half to grow spring barley. The cereal crops are each grown in the same location every year.
Number of harvests per year
1
Crops
CropYears grown
winter wheat
spring wheat
spring barley
Crop Rotations
continuous winter wheat
  • 1
    winter wheat
continuous spring wheat
  • 1
    spring wheat
continuous spring barley
  • 1
    spring barley
    Site previously grew spring wheat.
Measurement
VariableMaterialUnitsFrequencyScaleComment
grain yield traitNot specified

Design period: Period 3 (1996—)

Design Type
Other
Design description
Plots were divided for a treatment with and without nitrogen. The cereal crops are each grown in the same location every year. The three sections each measure 20.1 x 92.6m.
Number of plots
24
Number of subplots
48
Number of harvests per year
1
Crops
CropYears grown
winter wheat
spring wheat
spring barley
Crop Rotations
continuous spring wheat
  • 1
    spring wheat
continuous winter wheat
  • 1
    winter wheat
continuous spring barley
  • 1
    spring barley
Factor
Factor name
Factor levels
nitrogen fertilizer exposure
with N  (89.7 kgN/ha)
Applied to crop: All crops
without N  (0 )
Applied to crop: All crops
Measurement
VariableMaterialUnitsFrequencyScaleComment
grain yield traitNot specified

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