Evaluated Surface Drainage Problems with Data

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Evaluated Surface Drainage Problems with Data

• Charles Ellis
• Kent Shannon
• Ag Engineering Extension Specialists

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Yield Map Interpretation

• Man Made Variables
• Variety
• Planting date
• Tillage
• Compaction
• Natural Variability
• Soil fertility
• Soil type
• Drainage

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Data Sources

• Yield Data
• Aerial Photos
• EC Data
• Soils

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Man Made Variables

• Varieties
• Tillage
• Planting Date
• Compaction
• Chemical Applications
• Fertilizer Applications

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Man Made Variables

• Varieties
• Tillage
• Planting Date
• Compaction
• Chemical Applications
• Fertilizer Applications

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Natural Variables
Drainage
Soils
Soils
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Man Made Variables
Fertility
Field History
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Aerial Photos

• Man made variables
• Compaction
• Drainage
• Natural Variability
• Drainage

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Aerial Photos
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Image

• Obtain Aerial Photos
• Terraserver
• FSA
• www.cares.missouri.edu
• Show history of field

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Soil EC Readings
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Surface Drainage
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Surface Drainage Affects

• Tillage
• Planting Date
• Seeding Depth
• Emergence
• Leaching
• Harvesting

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97 beans
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99 Beans
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2003 Beans
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Multiple Years of Yield Data
Combining Multiply Years Using MapCalc Excel
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3 yr average bean yield
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Combine Elevation
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Elevation RTK
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Combine and RTK Elevation
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Yield and Topography
Pond
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Possible Solutions

• Drain Pond
• Remove Berm Around Pond
• Drain Field After Pond Removal
• Tillage to help drainage

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2004 corn
Yield variability has diminished. What are the
causes?
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Bu/A
1997 Corn Grain Yield - ASEQ Field 1 Centralia,
MO
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Ranking of Yield Variability and Ease of Remedy
Adapted from Larry Lotz, Yield Monitors and
Maps Making Decisions, Ohio State Univ.
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RTK GPS Elevation Map
1997 Corn Yield Map
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Multiple Years of Point Yield Maps
1998 Beans
1999 Corn
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Multiple Years of Point Yield Maps
2000 Beans
2001 Corn
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RTK GPS Elevation Map
1997 Corn Yield Map
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Multiple Years of Interpolated Yield Maps
1998 Beans
1999 Corn
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Multiple Years of Interpolated Yield Maps
2000 Beans
2001 Corn
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Using MapCalc Software to Better Visualize
Elevation Difference with Yield Data
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Equipment Used for RTK GPS Data Collection
Use a PocketPC computer running GPS data
collection software
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RTK Base Station
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Possible Solution with a PTO-Ditchers
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