1. Wheat Nitrogen Diagnostics
in the Yaqui Valley

2. OBJECTIVE
To develop diagnostic tools that will help farmers apply the optimum economic nitrogen rate in wheat.
To transfer this knowledge intensive technology into farmers’ fields.

3. 1603
710
814

5. On-farm Trials
194
250
125
250
125
125
250
142
100
125

6. NDVI

8. According to the Sensor
N rich
Strip
Area Fertilized
According to the Sensor
N rate Experiment

9. Yield Potential
N Deficient Area
N Rich Strip
NDVI = 0.65
NDVI = 0.31

12. Manuel Lopez de Lara 246 kgN/ha 6831kg Vs 123 kgN/ha 7068kg 300N 0N
No Yield
Difference
0 vs 300N
Manuel Lopez de Lara

13. 300 N 0N
300 kgN/ha Vs
180 kgN/ha
No Yield
Difference
Don Melquiades

14. Over the 11 tons Chicken Manure Technical Adviser called me
Vs.
20 tons Chicken Manure
No Yield Difference
Union Cajeme
Insisted in 150 kg N more
Over the 11 tons Chicken Manure
Technical Adviser called me
and asked me if I was making
that recommendation
Cesar Valenzuela

15. On-farm Trials for Validation of the
Sensor
Farmer
Basal N rate
N rate Experiment
Sensor
Rec.
C.Valenzuela
135 N
No response
L.A. Amaya
150 N
S. Dabdub
175 N
J. Castro
100 N
E. Pablos
0 N
200 N
M. Lopez de Lara
150N
J. Felix
Sacos
E. Olea
100N
Lost

16. N Rich
Strip
N Rich
Strip

17. Manuel Lopez de Lara 246 kgN/ha 6831kg Vs 123 kgN/ha 7068kg 300N 0N
No Yield
Difference
0 vs 300N
Manuel Lopez de Lara