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Silsoe College

Department of Agriculture and Biosystems Engineering

Ph.D. Submission

Submitted : 1997

Author : Mark Moore

Title : An Investigation into the accuracy of yield maps and their subsequent use in crop management

Supervisor: Simon Blackmore

Presentation Date: 16 February 1998

(NB. There are 35 files that take up 8.75mb of disk space)

If you download this thesis, please send a short email to us with 'Mark Moore thesis' as the subject, as we would like to know which other groups are working in this area

blue-bal.gif (923 bytes) Title page

blue-bal.gif (923 bytes) Acknowledgements

blue-bal.gif (923 bytes) Abstract

blue-bal.gif (923 bytes) Contents page

blue-bal.gif (923 bytes) List of Figures

blue-bal.gif (923 bytes) List of tables

green-ba.gif (925 bytes) Chapter 1   Introduction

green-ba.gif (925 bytes) Chapter 2   The effect of variables within the crop on yield measurement

green-ba.gif (925 bytes) Chapter 3   Yield Sensors

green-ba.gif (925 bytes) Chapter 4    Positioning systems for Precision Farming

green-ba.gif (925 bytes) Chapter 5   Potential yield map operational errors

green-ba.gif (925 bytes) Chapter 6   Data Interpolation

green-ba.gif (925 bytes) Chapter 7   A strategy for better crop management based on yield mapping

green-ba.gif (925 bytes) Chapter 8   Yield Trends

green-ba.gif (925 bytes) Chapter 9   Results and Discussion (Errata)

green-ba.gif (925 bytes) Chapter 10   10a 10b    Conclusions and Recommendations

blue-bal.gif (923 bytes) References

blue-bal.gif (923 bytes) Appendix 1   Position of grain samples taken from trial fields

blue-bal.gif (923 bytes) Appendix 2   Crop density maps and histograms density measured within the trial fields

blue-bal.gif (923 bytes) Appendix 3   Grain moisture content maps moisture content within the trial fields

blue-bal.gif (923 bytes) Appendix 4   Yield and Gross margin error maps having assumed crop density to be constant within fields

blue-bal.gif (923 bytes) Appendix 5   Yield and Gross Margin error maps due to variations in grain moisture content having assumed that grain has been corrected to a standard 14% grain moisture content

blue-bal.gif (923 bytes) Appendix 6   Yield and Gross Margin errors within a single harvest run having assumed crop density to be constant

blue-bal.gif (923 bytes) Appendix 7    Yield sensor accuracy tests for batch weights of grain against weighbridge totals

blue-bal.gif (923 bytes) Appendix 8    Validation of instantaneous grain flow measurements derivedfrom yield meter signal with different rates of grain flow

blue-bal.gif (923 bytes) Appendix 9    Filter testing to establish lead time errors

blue-bal.gif (923 bytes) Appendix 10   Position and types of error contained within the raw data sets for five trial fields

blue-bal.gif (923 bytes) Appendix 11   Yield map errors caused by narrow swaths and incorrect lead and lag times

blue-bal.gif (923 bytes) Appendix 12    The effect of Local Averaging interpolation on raw yield data

blue-bal.gif (923 bytes) Appendix 13    Yield maps of trial fields for consecutive years

blue-bal.gif (923 bytes) Appendix 14    Yield trends from season to season

blue-bal.gif (923 bytes) Appendix 15    Correlation coefficients for interpolated yield data sets against other years

blue-bal.gif (923 bytes) Appendix 16    Gross Margin data accessed from farm records

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