Pendleton No-till Wheat Experiment

This experiment has been added by the GLTEN Curators using existing published sources.
Local identifier
SF
Years operational
1982—
Objective
To compare the effects of the traditional winter wheat-fallow system under CT with chemical fallow under NT on C sequestration and N requirements.
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
experimental research station
People

Site: No-Till Wheat Plots

Local code
SF
Location
Pendleton
Oregon
USA
Geographic location
45.7183149570128, -118.623324329194
© OpenStreetMap contributors
Elevation
455 Metres
Visits permitted?
No
History
The site was cropped to wheat fallow with conventional tillage.
Management
The experiment area is under strict no-till management, with no tillage other than for seeding and stubble flailing. Herbicides are used to control weeds in both fallow and crop.
Soil description
Soils are coarse silty mixed mesic Typic Haploxerolls
Climate description
The climate is semi-arid, but partially influenced by maritime winds from the Pacific Ocean. Winters are cool and wet, and summers are hot and dry.
Climate properties
VariableTime periodValue (range)Units
precipitation420 millimeter
air temperature10 (-1 – 21) degree Celsius

Design period: (1982—)

Description
An identical set of no-till plots was added immediately north of the present experiment in 1997 to compare crop and soil parameters during early stages of no-till adoption with that for a long-term no-till system and a moldboard plough system.
Design description
The experiment has 10 treatments replicated four times. Plots measure 2.4 x30.4m. The experiment is fully phased.
Number of plots
40
Number of replicates
3
Number of harvests per year
1
Crops
CropYears grown
spring wheat
winter wheat
fallow
Crop Rotations
WW-SW  1982—1988
  • 1
    winter wheat
  • 2
    spring wheat
WW-F  1989—
  • 1
    winter wheat
  • 2
    fallow
Factors
Factor name
Factor levels
nitrogen fertilizer exposure
In 1994 N rates were adjusted down to align with those used in other long-term experiments.
control exposure  (0 )
1983—
N50  (56 kgN/ha)
1983—1993
Application method: band application
N100  (112 kgN/ha)
1983—1993
Application method: band application
N100b  (112 kgN/ha)
1983—1993
Application method: broadcast application method
N150  (168.1 kgN/ha)
1983—1993
Application method: band application
N40  (44.8 kgN/ha)
1994—
Application method: band application
N80  (89.7 kgN/ha)
1994—
Application method: band application
N120  (134.5 kgN/ha)
1994—
Application method: band application
N160  (179.3 kgN/ha)
1994—
Application method: band application
crop residue burning process
Burn
1983—1989
No burn
1983—1989
seeding date
Replaced the burn/no burn treatment.
September
1990—1997
Applied to crop: winter wheat
October
1990—1997
Applied to crop: winter wheat
Measurement
VariableMaterialUnitsFrequencyScaleComment
grain yield traitAll crops

Related publications