Experiment 406: Wheat Grain Yield Response to Nitrogen, Phosphorus and Potassium Fertilization under Irrigation
This experiment has been added by the GLTEN Curators using existing published sources.
- Objective
- To evaluate fertilizer applications on irrigated winter wheat grown in southwestern Oklahoma.
- Description
- In most years, plots were not irrigated in the spring because the economics of the irrigation district have dictated that water is only released for summer crops. When water was applied, it was usually a pre-irrigation prior to planting.
- Data Access Statement
- Freely available online
- Data Access Notes
- Data is available for download as an Excel file, but no licence, DOI or citation recommendation is provided.
- Data license
- Don't know
- Data URL
- https://nue.okstate.edu/Long_Term_Experiments/E406_15.xlsx
- Data policy
- Don't know
- Organizations
- Oklahoma State Universityresearch organisationSouthwest Research and Extension Centerexperimental research station
- People
Site: Experiment #406 site
- Type
- research station field
- Location
- AltusOklahomaUSA
- Geographic location
- 34.593722, -99.339367
- Visits permitted?
- No
- Soil description
- Tillman-Hollister – fine, mixed thermic Pachic Paluestoll
Design period: (1967—)
- Design Type
- Randomized complete block design
- Design description
- The experiment has 6 replicates each of 13 plots. Plots measure 5.7 x 18.3 m
- Number of plots
- 78
- Number of replicates
- 6
- Number of harvests per year
- 1
- Crop
Crop Years grown winter wheat - Factors
- Factor name
- Factor levels
- nitrogen fertilizer exposure
N0 (0 )
None appliedN40 (44.8 kgN/ha)
Applied to crop: winter wheatChemical form: ureaN80 (89.7 kgN/ha)
Applied to crop: winter wheatChemical form: ureaN120 (134.5 kgN/ha)
Applied to crop: winter wheatChemical form: ureaN160 (179.3 kgN/ha)
Applied to crop: winter wheatChemical form: urea- phosphate fertilizer exposure
P40
Applied to crop: winter wheatWith P at 44.8 kg P2O5 ha-1. Applied before Fall planting.P0 (0 )
Chemical form: triple superphosphateNo P applied- potassium fertilizer exposure
K40
Applied to crop: winter wheatChemical form: potassium chlorideWith K at 44.8 kg P2O5 ha-1. Applied before Fall planting.K0 (0 )
No K applied
- Factor combinations
- Treatment 1
- nitrogen fertilizer exposure: N0phosphate fertilizer exposure: P0potassium fertilizer exposure: K0
- Treatment 2
- nitrogen fertilizer exposure: N40phosphate fertilizer exposure: P0potassium fertilizer exposure: K0
- Treatment 3
- nitrogen fertilizer exposure: N80phosphate fertilizer exposure: P0potassium fertilizer exposure: K0
- Treatment 4
- nitrogen fertilizer exposure: N120phosphate fertilizer exposure: P0potassium fertilizer exposure: K0
- Treatment 5
- nitrogen fertilizer exposure: N160phosphate fertilizer exposure: P0potassium fertilizer exposure: K0
- Treatment 6
- nitrogen fertilizer exposure: N40phosphate fertilizer exposure: P40potassium fertilizer exposure: K0
- Treatment 7
- nitrogen fertilizer exposure: N80phosphate fertilizer exposure: P40potassium fertilizer exposure: K0
- Treatment 8
- nitrogen fertilizer exposure: N120phosphate fertilizer exposure: P40potassium fertilizer exposure: K0
- Treatment 9
- nitrogen fertilizer exposure: N160phosphate fertilizer exposure: P40potassium fertilizer exposure: K0
- Treatment 10
- nitrogen fertilizer exposure: N40phosphate fertilizer exposure: P40potassium fertilizer exposure: K40
- Treatment 11
- nitrogen fertilizer exposure: N80phosphate fertilizer exposure: P40potassium fertilizer exposure: K40
- Treatment 12
- nitrogen fertilizer exposure: N120phosphate fertilizer exposure: P40potassium fertilizer exposure: K40
- Treatment 13
- nitrogen fertilizer exposure: N160phosphate fertilizer exposure: P40potassium fertilizer exposure: K40
- Measurements
Variable Material Units Frequency Scale Comment grain yield trait winter wheat nitrogen content winter wheat In grain phosphorous content winter wheat In grain potassium content winter wheat In grain soil pH Soil soil organic carbon Soil total soil nitrogen Soil harvest date winter wheat sowing date winter wheat agronomic fertilization date winter wheat NDVI winter wheat irrigation date winter wheat
Related publications
- Project website