Preliminary Evaluation of Cotton Quality Mapping...Cotton Digital Agriculture Cotton may be...
Transcript of Preliminary Evaluation of Cotton Quality Mapping...Cotton Digital Agriculture Cotton may be...
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Biological and Agricultural Engineering
Preliminary Evaluation of Cotton
Quality Mapping
Dr. Jason Ward, Assistant Professor, NC State University
Dr. Terry Griffin, Associate Professor, Kansas State University
Enrique Pena, MS Student, NC State University
With Support From
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Background
• “The U.S. is the world’s most reliable producer of high
quality cotton.” – Cotton Inc
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Cotton Digital Agriculture
Cotton may be perceived
as “regional” and has not
had the same level of
investment, but can still
generate large data sets.
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Background
Cotton quality is determined using a
High Volume Instrument (HVI) Testing
• Micronaire (Diameter)
• Strength
• Color Grade
• Length
• Uniformity Index
• Trash
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Opportunity
i. Traceability of cotton modules back to the field
ii. Cotton quality mapping as a tool for growers
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Objectives
i. Map quality variability in
cotton fields by using machine
and gin data provided
ii. Explore relationships between
quality variables and yield
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Machine Data Streams
• Generated by CP690 during harvest operations
– Yield
– Harvest ID (HID)
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Gin Data Streams
• Classing by Permanent Bale Identifier (PBI)
– Not Module Averaged
• PBI by Module Serial No.
– Only truly manual step
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Make and Drop Map Yield Map
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Travel Path Map Module Map
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Discrete Module Path
• Randomly selected
modules selected
for visualization
• Impacts of travel
path of data quality
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Discrete Module Analysis
Module Mic Area (ac) Weight (lb) Value
599 4.80 a 2.2 5439 …
643 4.42 cd 2.5 5207 …
650 4.55 b 3.0 5366 …
664 4.38 d 2.9 5196 …
624 4.43 cd 2.6 5148 …
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Statistical Summary
• Tested HVI quality measures.
– Alpha = 0.05
– Proc Glimmix in SAS 9.4
• All measures significantly different
– Some individual modules were different
– Dispersion made meaningful means separation
difficult
– Still understanding system significance
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Micronaire at Field Scale
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Strength at Field Scale
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Length at Field Scale
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Length Uniformity at Field Scale
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Bale Value at Field Scale
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Spatial Analyses for Growers
• Mapping quality variables
and yield variability for
growers to use
• Production practices
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Future Analysis
• OLS Residual Plot
– Mic vs Soil Type and
Elevation
– Appears to suggest
complex spatial pattern
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Biological and Agricultural Engineering
Questions?
Enrique Pena // [email protected]
Jason Ward // [email protected]
Biological and Agricultural Engineering
Advanced Ag Lab
NC State University
Raleigh, NC