Crop Nitrogen Requirements
Nitrogen Uptake by Forage Crops
Having enough available nitrogen in the soil for the crop at all times is essential for maximum yields. How much nitrogen does your crop need and when does it need it?
This Excel 2007 spreadsheet calculates the amount of nitrogen that the crop will take up between each irrigation or other period of time that you specify.
Nitrogen Uptake and Organic Nitrogen Mineralization
This version of the nitrogen uptake spreadsheet includes a nitrogen release model that calculates both the interval and cumulative amount of available nitrogen released from organic form nitrogen over time.