North Dakota Crop Nitrogen Recommendation Calculators


ABOUT


sunflower

This application provides four NDSU crop nitrogen recommendation calculators for use in North Dakota sunflower, corn, hard red spring wheat/durum, and 2-row malting barley, respectively.

These calculators are designed only for use by growers and crop consultants working within in North Dakota. corn The corn calculator might also be useful in northwest Minnesota, the northern tier of counties in South Dakota, and southern Manitoba, since data from these areas were used to build the algorithms embedded within the recommendations; however, consideration of local Province or State recommendations should also be given.

The research N-rate data-base underlying these calculators is from the many-years of field research conducted by Dr. David Franzen, Soil Extension Specialist at North Dakota State University, and others.

wheat Nitrogen recommendation calculations are based on an economic production function that takes into account the yield response of the crop to added N, less the cost of the N. The recommendation is based not only on the yield increase from additional N, but the price of the commodity and the cost of N. More details about this "Maximum Return to Nitrogen" recommendation system can be found here or in the section of "Documents".

The recommendation provided also includes a "plus-minus" value. Although many experiments were used to develop these recommendations, there is no way for us to know the N supplying capability for the soils in each field in North Dakota. wheat Therefore, we leave it to the growers and their consultants to fine tune recommendations with their knowledge of specific field characteristics. This is especially important in wheat, where variety choice influences protein and the need for more or less N. Also, choice of N application method and decision to use effective urease or nitrification inhibitors may modify N rate.


CONTACT


David Franzen

Professor Emeritus
Extension Soil Specialist

Department of Soil Science, Scool of Natural Resource Sciences, NDSU

phone: 701-799-2565
Email: david.franzen@ndsu.edu

Click either the name or the photo to visit Dr. Franzen's NDSU homepage


Sunflower Nitrogen Calculator

closest sunflower price ($/lb)

closest nitrogen cost ($/lb)

percent organic matter in soil (%)

2-ft depth soil test nitrate-N (lbs/acre)

previous crops planted


ND 3-region map
click the map to enable the popup that can be zoomed

region in North Dakota
         

tillage type
         

sunflower type
    

Corn Nitrogen Calculator

closest corn price ($/bushel)

closest nitrogen cost ($/lb)

percent organic matter in soil (%)

2-ft depth soil test nitrate-N (lbs/acre)

previous crops planted

irrigation
    


ND 4-region map
click the map to enable the popup that can be zoomed

region in North Dakota
              

tillage



soil texture and early season N loss risk level




Spring Wheat & Durum Nitrogen Calculator

closest wheat/durum price ($/bushel)

closest nitrogen cost ($/lb)

percent organic matter in soil (%)

2-ft depth soil test nitrate-N (lbs/acre)

previous crops planted


ND 3-region map
click the map to enable the popup that can be zoomed

region in North Dakota
         

historical productivity      Definitions
         

Western Region

high productivity: historical yields greater than 50 bushels/acre
medium productivity: historical yields between 30 bushels/acre and 50 bushels/acre
low productivity: historical yields less than 30 bushels/acre


Eastern Region and Langdon Region

high productivity: historical yields greater than 60 bushels/acre
medium productivity: historical yields between 40 bushels/acre and 60 bushels/acre
low productivity: historical yields less than 40 bushels/acre


tillage type
         

Two-Row Malting Barley Nitrogen Calculator

closest 2-row barley price ($/bushel)

closest nitrogen cost ($/lb)

percent organic matter in soil (%)

2-ft depth soil test nitrate-N (lbs/acre)

previous crops planted


ND 3-region map
click the map to enable the popup that can be zoomed

region in North Dakota
         

tillage type