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Wheat Nitrogen Diagnostics in the Yaqui Valley. 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. 1603. 710. 814. On-farm Trials 2002-2003. 194. 250. 125.
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Wheat Nitrogen Diagnostics in the Yaqui Valley
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.
1603 710 814
On-farm Trials 2002-2003 194 250 125 250 125 125 250 142 100 125 0 0
N rich Strip Area Fertilized According to the Sensor N rate Experiment
Yield Potential N Deficient Area N Rich Strip NDVI = 0.31 NDVI = 0.65
246 kgN/ha 6831kg Vs 123 kgN/ha 7068kg 300N 0N No Yield Difference 0 vs 300N Manuel Lopez de Lara
300 kgN/ha Vs 180 kgN/ha No Yield Difference 300 N 0N Don Melquiades
11 tons Chicken Manure 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
Farmer Basal N rate N rate Experiment Sensor Rec. C.Valenzuela 135 N No response 0 L.A. Amaya 150 N No response 0 S. Dabdub 175 N No response 0 J. Castro 100 N No response 0 E. Pablos 0 N 200 N 0 M. Lopez de Lara 150N No response 0 J. Felix Sacos No response 0 E. Olea 100N Lost 0 On-farm Trials for Validation of the Sensor
N Rich Strip N Rich Strip
246 kgN/ha 6831kg Vs 123 kgN/ha 7068kg 300N 0N No Yield Difference 0 vs 300N Manuel Lopez de Lara