Incorporating Local Weather and Soil Variation in Adaptive Nitrogen Management: Validating the Adapt-N Tool for On-Farm Sidedress Recommendations. Bianca N. Moebius-Clune * , Harold M. van Es, Jeff M. Melkonian, Art DeGaetano , Laura Joseph, Robert R. Schindelbeck, Shannon Gomes
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in Adaptive Nitrogen Management:
Validating the Adapt-N Tool for On-Farm Sidedress Recommendations
Bianca N. Moebius-Clune*, Harold M. van Es, Jeff M. Melkonian, Art DeGaetano, Laura Joseph, Robert R. Schindelbeck, Shannon Gomes
*[email protected], Department of Crop and Soil Sciences, Ithaca, NY, Cornell University
Adapt-N: a tool for
adaptive N management in corn
A computational tool that farmers, crop consultants, and planners can use to develop precise nitrogen recommendations for fields adjusted for local weather, soil characteristics, and management practices.
Adapt-N has three important components:
Well-validated Precision Nitrogen Management (PNM) dynamic simulation model simulates locally-specific daily soil C and N transformations, water transport and corn N uptake, to calculate in-season N fertilizer needs
Uses high resolution climate data (daily precipitation and temperature) on a 4x4 km grid
Readily accessible, server-based web-interface allows farmers to define field-specific management and soil test info to run simulations from anywhere with internet access. No software is needed, and the tool even works from tablets and smart-phones.
for PSNT equivalent, divide by 4
Sample Strip Trial Layout:
Spatially Balanced Complete Block Design (after van Es 1993).
A = Adapt-N recommended N rate;
G = grower practice N rate
Preliminary Results of
On-farm strip trials on Long Island, NY:
Above: A = 93 lb N, G = 159 lb N
Below: A = 132 lb N, G = 175 lb N
Left: On-farm strip trial in IA. A = 100 lb N,
G = 150 lb N