Foliar UAN in Corn, Mexico Sensor Results, 2002
Nitrogen Use Efficiency, Nitrogen Fertilizers,nitrogen algorithms, NUE, Nitrogen and the Environment
Foliar N treatments applied on Friday, September 13, 2002
Pictures below taken Tuesday, September 17, 2002
Harvest: December 4, 2002 (whole plant)

Rates:
30 kg N/ha = 84 liters UAN/ha
60 kg N/ha = 167 liters UAN/ha
90 kg N/ha = 252 liters UAN/ha
120 kg N/ha = 335 liters UAN/ha
Anova:  NDVI Readings,  
N Rate NDVI Std. Dev.
September 17, 2002
30 kg N/ha 0.781 0.057
60 kg N/ha 0.712 0.055
90 kg N/ha 0.642 0.022
120 kg N/ha 0.639 0.031
SED 0.041  
September 23, 2002
0 kg N/ha 0.810 0.100
30 kg N/ha 0.728 0.086
60 kg N/ha 0.699 0.091
90 kg N/ha 0.623 0.039
120 kg N/ha 0.599 0.052
September 30, 2002
0 kg N/ha 0.796 0.025
30 kg N/ha 0.741 0.047
60 kg N/ha 0.740 0.048
90 kg N/ha 0.684 0.013
120 kg N/ha 0.681 0.001
October 2, 2002
0 kg N/ha 0.783 0.005
30 kg N/ha 0.726 0.067
60 kg N/ha 0.710 0.059
90 kg N/ha 0.683 0.010
120 kg N/ha 0.674 0.024
Harvest December 4
N rate Yield, kg/ha Std. Dev.
0 kg N/ha 9539 761
30 kg N/ha 10388 3005
60 kg N/ha 9792 1504
90 kg N/ha 8293 446
120 kg N/ha 8321 185
SED =    
 
 
 
 
 
 
Nitrogen Use Efficiency, Nitrogen Fertilizers,nitrogen algorithms, NUE, Nitrogen and the Environment Trimble Pocket Sensor, Greenseeker, NDVI, nitrogen