Table of Contents
Understanding Factors That Limit
Yield in Corn
Precision Farming: Excitement!
Precision Farming: Tools
Success With PF Technology
Yield Limiting Factors (YLFs)
Major Categories of
Yield-Limiting Factors
YLF Categories: Weather Stress...
Bragging Rights For Top U.S.
Corn Yields?
Bragging Rights For Top U.S.
Corn Yields, 1997
Bragging Rights For Top U.S.
Corn Yields, 1997
Basis for High Corn Yields?
YLF Categories: Pest Pressures...
YLF Categories: Soil
Characteristics...
E.B. White,
farmer-poet-writer...
YLF Categories: Management
Practices...
Cultural Practices...
Which YLFs Are Most Important?
‘Perennial’ Yield
Limiting Factors
‘Sporadic’ Yield
Limiting Factors
Identifying YLFs Is Difficult
Identifying YLFs Is Difficult
Identifying YLFs Is Difficult
Field Observations Crop
Diagnostics
Field Observations Crop
Diagnostics
Field Observations Crop
Diagnostics
Examples of Field
Observations: Planting to Emergence...
Examples of Field
Observations: Emergence to Knee-High...
Examples of Field
Observations: Knee-High to Tasseling...
Examples of Field
Observations: Tasseling Silking...
Examples of Field
Observations: Tasseling to Maturity...
Examples of Field
Observations: Maturity to Harvest...
Examples of Field
Observations: Harvest...
Beware of the Hazards of
Correlations
Ex. of Hazardous Correlation
Real-Life Example #1
Real-Life Example #2
Without Season-Long Monitoring,
Yield Map Interpretation Can Be Very Difficult
My Advice?
Precision Farming: Challenge
Precision Farming: Challenge
Let’s Remember...
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Author:
R.L. (Bob) Nielsen
Agronomy Department
Purdue University
West Lafayette, IN 47907-1150
Email:
rnielsen@purdue.edu
Home Page:
www.agry.purdue.edu/ext/corn/rln-bio.htm
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