Note: This calculator was updated on February 28, 2018. If you have previously used this calculator, please perform a 'hard' refresh of this page on your browser (Windows: Hold down Ctrl and press F5, Mac: Hold down ⌘Cmd and ⇧Shift and then press R). This only needs to be done once.
The Crop Yield to Nitrogen Removed Calculator (also known as the Y-to-R Calculator) estimates N removed (R) and the ratio of N applied (A) to N removed (A/R). Results can be calculated on inputs for a single crop or for multiple crops. Conversion factors were developed by UC Davis (Geisseler 2016) based on the best available information. The conversion factors will continue to be refined as additional research becomes available.
None of the data entered into this calculator is saved; this tool and any calculated outputs are only displayed for your reference.
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