Nutrient Management Spreadsheets
Here, grouped conveniently in one location, are some of our most popular spreadsheets for nutrient management. Follow the supplied links for more information on how to use the spreadsheets, or to explore other resources on this site. New spreadsheets for recordkeeping, organic nitrogen mineralization and nitrogen budgeting are currently being developed and will be posted as soon as they are available.
IMPORTANT NOTE: Many of the more sophisticated tools will only run on Excel 2007 or later. They cannot be converted to a prior version. Follow the supplied link for a free trial of Microsoft Excel 2010.
Application Target GPM Calculator for Flow Meters
This spreadsheet generates a data sheet with instructions on what flow rate (gpm) to use for each field or check in order to apply the amount of lagoon water nitrogen specified in a nutrient management plan.
More information on using this file: Application targeting spreadsheets for meters
Application Target Run Time Calculator for Flow Rate
This spreadsheet generates a data sheet with instructions on how long to run the lagoon pump onto each field or check in order to apply the amount of lagoon water nitrogen specified in a nutrient management plan.
More information on using this file: Targeting Spreadsheet for Flow Rate
Nitrogen Uptake for Winter Cereal Forage, Silage Corn, and Triplecrop Sudangrass and Organic Nitrogen Release Calculator
Calculates the amount of nitrogen needed by the crop for each irrigation interval, using default or your own weather data. Also calculates corn Growing Degree Units (GDUs) from planting to the present, and can be used to forecast when the crop will be ready. Calculates cumulative and interval mineralization of applied organic form nitrogen in percent and pounds per acre.
More information on using this file: Nitrogen Uptake and N Release Models