The Climate FieldView™ digital agriculture platform provides farmers with centralized field data management, visualization and reporting that creates actionable agronomic insights for data-driven decisions to optimize fertility and seeding management. Climate FieldView™ is advertised to help customers manage variability within their fields, across their operation, and across years with different weather conditions. As of 2017 there were approximately 120 million total subscribed acres with 35 million paid acres on the Climate FieldView™ platform.
The Nitrogen Management Tool is integrated with other Climate FieldView™ features, providing a unified platform for nutrient management, seeding, field insights, yield analytics and weather monitoring.
Climate FieldView™ yield analysis tools allow farmers to quickly compare yield patterns with other data layers at the end of the season, enabling them to determine how fertility and other agronomic decisions can impact yield.
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- Field boundaries mapped from Climate FieldView™ or imported from an external source
- Nitrogen management program including product types and application information
- Seeding program information imported from planter or customer-entered
- Field history including previous crop, tillage system, and manure history
- Soil data, weather data, and field imagery data are automatically provided by Climate FieldView™ for every customer’s field. Additional soil test information may optionally be imported using Climate FieldView’s™ Data Inbox feature.
- Yield goals
Replicated strip trial results were analyzed for 34 fields in 2016 following the protocol established by the NutrientStar program. All nitrogen response trials were conducted with corn. Most trials were corn following soybeans and the remainder were corn following corn or corn following wheat. Locations included fields in 5 states (see Fig 2). No trials that included manure applications were included in this analysis.
Most fields had 4 N treatment rates and 4 replicates per treatment. Application rates were 100, 150, 200 and 250 pounds N/acre at most trials, but at some trials, the rates were consistently higher by a small amount due to different rates of starter N applications. Treatments were mostly applied at sidedress, either as UAN or anhydrous. Most fields also had a spring pre-plant application. Yield response to nitrogen was determined from the trial data (using a combination of quadratic and linear fit methods in accordance with NutrientStar procedures; see figure 3 for an example).
The Nitrogen Management Tool (current product version as of December 2017 at the time of writing) was used to estimate sidedress nitrogen application requirements for each specific field. Known weather was used up until the sidedress date, and forecasted weather was used for the remainder of the season, to mimic a user’s experience at sidedress time. Sidedress rates were adjusted to achieve a target N status of +15 lbs/ac. Yield goals were selected at the time of sidedress by consultants and growers managing field trials. Consultants and growers were advised to select yield goals corresponding to the fourth highest yield achieved by growers in the five crops prior to the trial (i.e. the 80th percentile of achieved yield in the last five crops).
Grower-preferred nitrogen application rates (solicited from farmers of the trial fields in consultation with expert agronomists) and Nitrogen Management Tool-based rates were compared based on nitrogen costs, yield incomes, and net economic outcomes. Yields corresponding to the farmer and Nitrogen Management Tool chosen nitrogen rates were estimated using the yield response to nitrogen relationships described above, with the price of corn set to $4.00/bu and the price of nitrogen set to $0.40/lb.
Map of locations of field trials used in the analysis.
- Nitrogen Management Tool-based application rates enabled a reduction in N application compared to grower rates by 37 lbs/acre on average. Reduced nitrogen applications resulted in a 4 bu/acre average yield loss while lowering the potential impacts on water and air quality posed by higher nitrogen application rates. Nitrogen Management Tool improved nitrogen use efficiency (NUE) by an average of 25%.
- Across all trials, Nitrogen Management Tool-based application rates resulted in no statistically significant change in return to nitrogen compared with grower rates (p = 0.998), using farmer estimated yield goals.
- In a separate analysis, Nitrogen Management Tool was used to estimate side-dress nitrogen application requirements for each field using yield goals selected from yield response to nitrogen curves. When actual yield outcomes were used to calculate yield goals:
- Nitrogen Management Tool-based application rates showed an average increase in return to nitrogen of $5.56/acre over grower N rates, i.e. resulted in an overall average increase of $5.56/acre over the grower rate compared with no significant difference in profit reported for the same trials when farmer estimated yield goals were used in the Nutrient Management Tool.
- Nitrogen Management Tool-based application rates were less than the grower rates by an average of 24 lbs/acre, creating an economic benefit from cost savings. Reduced nitrogen applications resulted in no statistically significant change in yield (p = 0.26).
These results highlight the potential for increasing economic returns when estimated yield goal or yield potential is closer to the actual achieved yield.
Example field from Henry County, Ohio. Field trial yield response to nitrogen was modeled with a quadratic regression. Different N rates are plotted as vertical lines: the Economically Optimal N Rate (the N rate at which profit is maximized), the grower N rate, and the Nitrogen Management Tool-based N rate. The Nitrogen Management Tool-based N rate increased profit over the grower N rate by $5.56. For-profit calculation, the price of corn was set to $4.00/bu and the price of nitrogen was set to $0.40/lb.
To learn more about the Climate FieldView™ explore the individual trial results here.