Results of Nitrogen Trials in Adapt Network SW Michigan Project 2012 Tom Morris Professor, Soil...
21
Results of Nitrogen Trials in Adapt Network SW Michigan Project 2012 Tom Morris Professor, Soil Fertility Specialist University of Connecticut [email protected] March 14, 2013
-
Upload
robyn-pyper -
Category
Documents
-
view
216 -
download
0
Transcript of Results of Nitrogen Trials in Adapt Network SW Michigan Project 2012 Tom Morris Professor, Soil...
Results of Nitrogen Trials in Adapt Network SW Michigan Project 2012
Tom MorrisProfessor, Soil Fertility Specialist
University of Connecticut [email protected]
March 14, 2013
Two goals we agree on
Everyone wants clean water for drinking, recreation, and fish/seafood production
Everyone wants food production
Rainfall – 2012
Bryan, OH; Deviation Fort Wayne; 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
Corn Stalk Nitrate Test
Collect stalks anytime between 1/3 milk line and 3 weeks after black layer
02000400060008000
100001200014000
Corn stalk nitrate of 62 fields in SW MI in 2012
Co
rn S
talk
Nit
rate
(p
pm
)
Optimum range
PrePla
nt
Pre&SD
Sided
ress
ST&SD0%
20%
40%
60%
80%
100%
ExcessiveOptimalMarginalLow
1 54
Corn stalk nitrate values for 62 GSS fields in SW MI in 2012 – Timing of N application
Per
cen
t o
f to
tal
fiel
ds
in a
cat
ego
ry
3 4
NO YES0%
20%
40%
60%
80%
100%
ExcessiveOptimalMarginalLow
Per
cen
t o
f to
tal f
ield
s in
a c
ateg
ory
Corn stalk nitrate values for 62 GSS fields in SW MI in 2012 – Manure applications
52 10
Corn
Potato
es
Soybea
ns0%
20%
40%
60%
80%
100%
ExcessiveOptimalMarginalLow
Per
cen
t o
f to
tal f
ield
s in
a c
ateg
ory
Corn stalk nitrate values for 62 GSS fields in SW MI in 2012 – Previous Crop
31 1 30
NoTill Till0%
20%
40%
60%
80%
100%
ExcessiveOptimalMarginalLow
Corn stalk nitrate values for 62 GSS fields in SW MI in 2012 – Tillage
Per
cen
t o
f to
tal f
ield
s in
a c
ateg
ory
13 49
NH3 UAN Urea0%
20%
40%
60%
80%
100%
ExcessiveOptimalMarginalLow
Corn stalk nitrate values for 62 GSS fields in SW MI in 2012 – Form of N
6 54 2
Per
cen
t o
f to
tal f
ield
s in
a c
ateg
ory
Yellow White Red Blue0%
10%20%30%40%50%60%70%80%90%
100%
ExcessiveOptimalMarginalLow
Per
cent
100 150 200 250
Corn stalk nitrate values for 28 Strip Trials in SW MI in 2012
Pounds N/acre
TRT Bu/A Stalk $
100 210 40 0
150 244 103 145
200 290 561 205
250 296 2571 5
Need 5 bu to payfor 50 lbs of N
ST12MISW124
TRT Bu/A Stalk $
100 216 4633 0
150 215 6918 -30
200 218 6427 -10
250 219 8109 -20
Need 5 bu to payfor 50 lbs of N
ST12MISW117 Trial area
TRT Bu/A Stalk $
100 239 63 0
150 255 1422 55
200 260 2169 0
250 267 5055 10
Need 5 bu to payfor 50 lbs of N
ST12MISW121Trial area
TRT Bu/A Stalk
100 140 5444
150 139 2806
200 145 5855
250 140 4613
Need 5 bu to payfor 50 lbs of N
ST12MISW397
TRT Bu/A Stalk $
100 180 357 0
150 180 681 -25
200 185 693 0
250 190 1172 0
Need 5 bu to payfor 50 lbs of N
ST12MISW120
What rate apply next year?
ConclusionsOne year of data
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
