Effectiveness of Field Edge Setback to Reduce Nutrient Transport from Manure Application to FrozenSn

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Effectiveness of Field Edge Setback to Reduce
Nutrient Transport from Manure Application to
Frozen/Snow Covered Fields

• Robert Mullen, Clayton Dygert, and Jon Rausch
• Nutrient Management/Soil Fertility Specialist
• Ohio State University
• Lima, OH
• June 23, 2009

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Introduction

• Application of nutrients to frozen/snow covered
  fields represents a risk to surface water during
  thaw events
• Are there application approaches that could be
  used to mitigate nutrient transport?

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Objective

• To evaluate the usefulness of establishing a 200
  ft setback to mitigate nutrient transport from a
  winter application of dairy manure to snow
  covered/frozen ground that has surface residue.

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Field Layout

• Slope lt 2
• Fescue/ryegrass crop planted in late summer 2007
  to achieve 90 ground cover
• Plot size 12 ft wide x 100 ft or 300 ft long
• Manure was applied on January 28, 2008
• Dairy manure from open lagoon was applied at a
  5,000 gallons per acre rate
• NH4-N rate 24 lb/acre, P2O5 rate 11.5
  lb/acre, K2O rate 86.5 lb/acre

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Plot Layout
Manure application
Bucket collectors
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Weather data

• Sampling dates

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Data

• February 8, 2008
• No statistical differences

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Data

• February 8, 2008
• DRP and TP were significantly higher in the
  manure/no setbacktreatment

LSD0.1 PO4-P 0.10
LSD0.1 TP 0.13
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Data

• February 8, 2008

LSD0.1 K 0.7
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Data

• February 18, 2008
• Ammonium-N levels were numerically higher in the
  manure/no setbacktreatment

LSD0.1 NH4-N 23.1
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Data

• February 18, 2008
• Manure/no setback treatment had numerically
  higher DRP and TPthan all other treatments

LSD0.1 PO4-P 2.6
LSD0.1 TP 4.4
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Data

• February 18, 2008

LSD0.1 K 7.8
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Data

• March 17, 2008
• Ammonium-N levels were significantly higher in
  the manure/no setbacktreatment

LSD0.1 NH4-N 5.1
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Data

• March 17, 2008
• DRP and TP levels were significantly higher in
  the manure/no setback treatment

LSD0.1 PO4-P 0.9
LSD0.1 TP 1.2
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Data

• March 17, 2008

LSD0.1 K 2.0
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Data

• April 3, 2008
• Manured treatments had numerically higher
  ammonium-N levelsthan non-manuredtreatments

LSD0.1 NH4-N 9.3
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Data

• April 3, 2008
• Manure treatments had numerically higher DRP and
  TP levelsthan non-manuredtreatments

LSD0.1 PO4-P 2.1
LSD0.1 TP 3.6
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Data

• April 3, 2008

LSD0.1 K 0.9
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Thanks!!!

• Questions?
• Useful webpages
• Agronomic Crops Team
• http//agcrops.osu.edu/
• OSU Fertility web page
• http//agcrops.osu.edu/fertility
• Crop Observation and Recommendation Network
  (CORN)
• http//corn.osu.edu/

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2009

• Same general experiment with a few exceptions
• Corn planted in May 2008
• Manure applied at same rates and methodologies in
  January 23, 2009
• NH4-N rate lb/acre, P2O5 rate lb/acre, K2O rate
  lb/acre