Objective: To discuss the current regional project and identify improvements needed for conducting future collaborative sensor-based research.

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Presentation transcript:

Objective: To discuss the current regional project and identify improvements needed for conducting future collaborative sensor-based research

Regional Corn Trials 2005 Treatment Pre-plant N Top-dress Method of Application lb/ac 1 Check 2 N Rich Strip N Rich Strip (160 to 200 depending on preplant soil test) 3 40 4 80 5 120 6 160 7 Nitrogen Sufficiency (30lbs applied when SI<95%) 8 9 NFOA- OSU 10 11 Missouri / Minnesota 12 13 Virginia spreadsheet 14

2005: Nebraska, Oklahoma, Missouri, Virginia, Minnesota Issues for ALL TRIALS Replications: 3-4 Plot size: 4 rows wide x 20 - 30 ft long Row Spacing: As per equipment used (30" or 36") P and K applied preplant to local sufficiency levels Nitrogen to be applied between V8 and V12 Nitrogen Sources: 1. Pre-Plant: Urea or UAN 2. Topdress: UAN Sensor/Chlorophyll Meter Readings Active Sensor readings taken weekly (RED) Chlorophyll meter readings (SPAD) taken weekly Pre Plant Soil Tests (0-12, and 12-24") NO3-N, and NH4-N Total N Organic C pH

Regional Trial 2006 ? Components evaluated separately Elimination of specific components Can Yield Potential Be Predicted Can RI Be Predicted Is Sufficiency Sensitive to Yield Level Entire Algorithm Approach Complete Packages By Region Joint Workshop Algorithm

Regional Trial Issues Minnesota Independence of RI and YP0 Reference strip SPAD, V10 N Credits using SPAD Independence of RI and YP0 Dualex (France) Incorporation of SOIL color and EC Optimum N Rate not Related to Yield Level Total N Uptake at V8 highly correlated with final grain yield (Minnesota)

Regional Trial Issues cont. INSEY, Minnesota, poor correlation at V8 INSEY used to combine sites (only one site) Forage N uptake at V8-V12 highly correlated with final grain yield Must consider soil color, soil organic matter, other production variables for the regional approach (Gyles) Economic N Rate changes within a Field (MO) Can Yield Potential Be Predicted in All Environments ?

Regional Trial Standardized protocol for collecting Data (units)