What is the N concentration of the transpirational stream moving into a 150 buacre corn crop

1
What is the N concentration of the
transpirational stream moving into a 150 bu/acre
corn crop ?
2
Total N uptake by a 150 bu / acre corn crop
210 lbs N / acre
http//www.soil.ncsu.edu/publications/Soilfacts/AG
-439-16/
3
100 of uptake
85 25 days
210 lbs/acre
60 days
Nitrogen uptake by corn
3.5 lbs N/acre/day maximum uptake rate
http//www.ext.vt.edu/pubs/rowcrop/418-016/418-016
.html
4
Maximum uptake rate lt 0.3 / day
http//www.bae.ncsu.edu/programs/extension/evans/a
g4524-7.gif
5
http//www.bae.ncsu.edu/programs/extension/evans/a
g4524-7.gif
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Lake Wheeler Rd Field Lab data
?monthly ET 22.88
7
1 acre- inch 226,512 lbs of water 20 acre- inch
4,530,240 lbs of water 25 acre- inch
5,662,800 lbs of water
210 lbs of N / acre 20 acre-inch
46.3 ppm
210 lbs of N / acre 25 acre-inch
37 ppm
8
Concentration of transpirational stream _at_ 60 days
3.5 lbs N / acre / day
51.5 ppm
0.3 226,512 acre - inch