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Nutrient Budgeter

A MATLAB-based program to simplify the calculation of watershed
nitrogen and phosphorus budgets

Sylvia C. Schaefer and Merryl Alber
Department of Marine Sciences, University of Georgia, Athens, GA 30602, USA

Nutrient Budgeter screen shot

Nutrient Budgeter is a MATLAB-based program for calculating nitrogen and phosphorus inputs to watersheds. Nitrogen inputs calculated include atmospheric deposition, fertilizer use, net food and feed import, and biological fixation. Phosphorus inputs calculated include fertilizer use and net food and feed import.

For a complete user guide, please see the documentation available below.

Software requirements:

MATLAB (ver. R2009a or higher)
MATLAB Statistics Toolbox
Microsoft Excel (Windows system)

Distribution Files:

Program files with samples (.zip file)


Boyer, E.W., Goodale, C.L., Jaworski, N.A., Howarth, R.W., 2002. Anthropogenic nitrogen sources and relationships to riverine nitrogen export in the northeastern USA. Biogeochemistry 57, 137-169.


This material is based upon work supported by the National Science Foundation under grants OCE-9982133, OCE-0620959, OCE-1237140 and OCE-1832178. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.