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A generalised model of crop lodging
C J Baker1, M Sterling1, P Berry2
1School of Civil Engineering, University of Birmingham, UK.
Journal of Theoretical Biology
|August 12, 2014
Summary
Crop lodging, caused by wind and rain, leads to significant economic losses. A new generalized model improves predictions for wheat, oats, and oilseed rape, offering simple formulas to calculate lodging risk.
Area of Science:
- Agricultural Science
- Agronomy
- Plant Science
Background:
- Crop lodging due to wind and rain causes substantial economic losses globally.
- Previous models for winter wheat lodging had limitations in wind field and root/soil interaction.
- Stem lodging at locations other than the base was not adequately addressed in earlier models.
Purpose of the Study:
- To develop a generalized crop lodging model overcoming limitations of previous work.
- To provide a mechanical model of wind/plant/soil interactions for improved lodging prediction.
- To clarify the lodging process and calculate lodging risk for various crops.
Main Methods:
- Developed a generalized mechanical model of wind/plant/soil interactions.
- Formulated simple graphical methods for calculating lodging risk.
- Defined simple formulae for lodging risk based on dimensionless variables.
Main Results:
- The new model successfully applies to wheat, oat, and oilseed rape.
- Lodging risk calculations were analyzed for sensitivity to parameter uncertainties.
- Lodging risk can be determined from simple functions of dimensionless stem and root lodging velocities.
Conclusions:
- The generalized model offers a more robust approach to predicting crop lodging.
- Simple formulae derived from the model can effectively estimate lodging risk.
- This research provides valuable insights for farmers and agronomists to mitigate lodging risks.
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