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Results of Nitrogen Trials in Adapt Network Maumee Project 2012 Summaries of Data from 2008-2011. Tom Morris Professor, Soil Fertility Specialist University of Connecticut [email protected] March 13, 2013. Two goals we agree on .

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results of nitrogen trials in adapt network maumee project 2012 summaries of data from 2008 2011

Results of Nitrogen Trials in Adapt Network Maumee Project 2012 Summaries of Data from 2008-2011

Tom MorrisProfessor, Soil Fertility Specialist University of Connecticut [email protected] March 13, 2013

slide2

Two goals we agree on

Everyone wants clean water for drinking, recreation, and fish/seafood production

Everyone wants food production

rainfall 2012
Rainfall – 2012

Joe Deviation Greg Deviation

March 3.08 +0.48 2.28 -0.32

April 1.29 2.23 1.61 -1.91

May 1.06 -3.21 0.53 -3.74

June 0.65 -3.51 2.28 -1.88

July 4.35 +0.11 1.66 -2.58

Aug 3.51 -0.13 3.18 -0.46

Sept 3.61 +0.81 0.51 -2.29

Total 17.37 -7.86 12.05 -13.18

slide5

Corn stalk nitrate results - 2012

64 GSS fields in Maumee Adapt Network

Corn Stalk Nitrate (ppm)

Optimum range

slide6

Corn stalk nitrate values for 39 fields manure or no manure in Maumee in 2012

Percent of total fields in the category

5

slide7

Corn stalk nitrate values for 39 fields previous crops in Maumee in 2012

Percent of total fields in the category

31

6

2

slide8

Corn stalk nitrate values for 37 fields till or no-till in Maumee in 2012

Percent of total fields in the category

10

27

slide9

Corn stalk nitrate results - 2008 to 2012

347 GSS fields in Maumee Adapt Network

Corn Stalk Nitrate (ppm)

Optimum range

slide10

Dry?

Wet

Drought

Stalk NO3 Results

Low (<250 ppm) Marginal (250-700 ppm) Optimum (700-2000 ppm) High (>2000 ppm)

slide11

Strip Trials in Maumee Adapt Network in 2012

45 strip trials

1/3 of the trials yielded less than 100 bu/acre or were not harvested

Average yield across all plots was 129.2 bu/acre

Yields ranged from 97 bu/acre to 164 bu/acre (one irrigated field yielded 217 bu/acre)

slide12

Strip Trials in Maumee Adapt Network in 2012

4 treatments: 100, 150, 200 and 250 lbs N/acre

Three replications at each field

Most N sidedressed as UAN

slide14

Strip Trials

Optimum range

slide16

Average Yield at 38 Strip Trials in Maumee in 2012

Average Yield (bu acre-1)

Increase = 9 bu/acre

N Rate (lbs/acre)

slide17

Average Corn Stalk Values at 38 Strip Trials in Maumee in 2012

Average Corn Stalk Nitrate (ppm)

N Rate (lbs/acre)

slide18

Yield for 62 N strip trial sites

Maumee Adapt Network - 2008-2010

Bu/acre

169

160

170

146

110

slide19

Stalk nitrate for 62 N strip trial sites

Maumee Adapt Network - 2008-2010

slide20

Yield for 21 N strip trial sites

Maumee Adapt Network -2011

slide21

Stalk values for 21 N strip trial sites

Maumee Adapt Network -2011

slide22

ST12OHMM022

92 bu/acre

slide23

Average Yield = 92 bu/acre

Red = 100 lbs; Yellow = 150 lbs; Blue = 200 lbs; White = 250 lbs

slide25

Average Yield = 156 bu/acre

Red = 100 lbs; Yellow = 150 lbs; Blue = 200 lbs; White = 250 lbs

slide26

Conclusions

On average 150 lbs N/acre provides economical yield

Averages are dangerous – You need to look at the stalk values and yields from strip trials from your fields to make the best decision about nitrogen for your fields

Keep field-by-field records

Think in terms of being a better manager of nitrogen over the next 10 years

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