Experiment 502: Wheat Grain Yield Response to Nitrogen, Phosphorus and Potassium Fertilization
This experiment has been added by the GLTEN Curators using existing published sources.
- Objective
- To evaluate the effect of long-term N, P and K fertilization in continuous winter wheat.
- Description
- In recent years, this study has also been used to develop yield potential models and yield predictions through sensor based technologies.
- 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/E502_18.xlsx
- Data policy
- Don't know
- Organizations
- Oklahoma State Universityresearch organisationOSU North Central Researchexperimental research station
- People
Site: Experiment #502 site
- Type
- research station field
- Location
- LahomaOklahomaUSA
- Geographic location
- 36.388267, -98.108654
- Visits permitted?
- No
- Management
- Plots are managed using conventional tillage.
- Soil description
- Grant silt loam (fine-silty, mixed, thermic Udic Argiustoll)
Design period: (1970—)
- Design Type
- Randomized complete block design
- Design description
- The experiment has 4 replicates each of 14 plots. Plots measure 4.9 x 18.3 m
- Number of plots
- 56
- Number of replicates
- 4
- Number of harvests per year
- 1
- Crop
Crop Years grown winter wheat - Factors
- Factor name
- Factor levels
- nitrogen fertilizer exposure Applied before Fall planting
N0 (0 )
No N appliedN20 (22.4 kgN/ha)
Applied to crop: winter wheatChemical form: ureaN40 (44.8 kgN/ha)
Applied to crop: winter wheatChemical form: ureaN60 (67.3 kgN/ha)
Applied to crop: winter wheatChemical form: ureaN80 (89.7 kgN/ha)
Applied to crop: winter wheatChemical form: ureaN100 (112 kgN/ha)
Applied to crop: winter wheatChemical form: urea- phosphate fertilizer exposure Applied before Fall planting.
P0 (0 )
Applied to crop: winter wheatNone appliedP20 (22.4 kgP/ha)
Applied to crop: winter wheatChemical form: triple superphosphateP40 (44.8 kgP/ha)
Applied to crop: winter wheatChemical form: triple superphosphateP60 (67.3 kgP/ha)
Applied to crop: winter wheatChemical form: triple superphosphateP80 (89.7 )
Applied to crop: winter wheatChemical form: triple superphosphate- potassium fertilizer exposure Applied before Fall planting.
K0 (0 )
No appliedK60 (67.3 )
Applied to crop: winter wheatChemical form: potassium chlorideK60 sulpomag (67.3 kgK/ha)
Applied to crop: winter wheatChemical form: potassium magnesium sulfate
- Factor combinations
- Treatment 1
- nitrogen fertilizer exposure: N0phosphate fertilizer exposure: P0potassium fertilizer exposure: K0
- Treatment 2
- nitrogen fertilizer exposure: N0phosphate fertilizer exposure: P40potassium fertilizer exposure: K60
- Treatment 3
- nitrogen fertilizer exposure: N20phosphate fertilizer exposure: P40potassium fertilizer exposure: K60
- Treatment 4
- nitrogen fertilizer exposure: N40phosphate fertilizer exposure: P40potassium fertilizer exposure: K60
- Treatment 5
- nitrogen fertilizer exposure: N60phosphate fertilizer exposure: P40potassium fertilizer exposure: K60
- Treatment 6
- nitrogen fertilizer exposure: N80phosphate fertilizer exposure: P40potassium fertilizer exposure: K60
- Treatment 7
- nitrogen fertilizer exposure: N100phosphate fertilizer exposure: P40potassium fertilizer exposure: K60
- Treatment 8
- nitrogen fertilizer exposure: N60phosphate fertilizer exposure: P0potassium fertilizer exposure: K60
- Treatment 9
- nitrogen fertilizer exposure: N60phosphate fertilizer exposure: P20potassium fertilizer exposure: K60
- Treatment 10
- nitrogen fertilizer exposure: N60phosphate fertilizer exposure: P60potassium fertilizer exposure: K60
- Treatment 11
- nitrogen fertilizer exposure: N60phosphate fertilizer exposure: P80potassium fertilizer exposure: K60
- Treatment 12
- nitrogen fertilizer exposure: N60phosphate fertilizer exposure: P60potassium fertilizer exposure: K0
- Treatment 13
- nitrogen fertilizer exposure: N100phosphate fertilizer exposure: P80potassium fertilizer exposure: K60
- Treatment 14
- nitrogen fertilizer exposure: N60phosphate fertilizer exposure: P40potassium fertilizer exposure: K60 sulpomag
- Measurements
Variable Material Units Frequency Scale Comment grain yield trait winter wheat forage yield winter wheat straw 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 sowing date winter wheat harvest date winter wheat agronomic fertilization date winter wheat NDVI winter wheat
Related publications
- Project website