Extension Publications:

• D.W. Franzen, F.X.M. Casey, N. Derby. 2023 Site-specific Farming Yield Mapping and Use of Yield Map Data NDSU Ext Circ. SF1176-3 (Revised)

• Franzen, D.W., T. Scherer, and S. Sieler. 2023 Compatibility of North Dakota Soils for Irrigation  NDSU Ext. Circ. AE-1637.(Revised)

• E. Deibert and D.W. Franzen 2023 Fertilizer Application with small-grain Seed at Planing. NDSU Ext. Cic. SF1751(Revised)

• Franzen, D.W. 2023 North Dakota Fertilizer Recommendation Tables and Equations SF882
• Franzen, D.W. 2023 Fertilizing Winter Rye NDSU Ext. Circ. SF-1462 (Revised)
• Franzen, D.W. 2023 Economics and the Environment NDSU Ext. Circ. SF-1176-4 (Revised)
• Franzen, D.W. 2023 Fertilizing Malting and Feed Barley NDSU Ext. Circ. SF-723 (Revised)
• 2023 D. Franzen, J. Camberato, E. Nafziger, D. Kaiser, K. Nelson, D. Ruiz-Diaz, E. Lentz, G. Singh, K. Steinke, J. Grove, E. Ritchey, L. Bortolon, C. Rosen, B. Maharjan, L. Thompson. Performance of Selected Commercially Available Asymbiotic N-fixing Products in the North Central Region NDSU Ext. Cir. SF-2080
• Franzen, D.W. 2023 Fertilizing Sugarbeet in North Dakota NDSU Ext. Circ SF-714 (Revised)
• D.W. Franzen and M. Berti. 2023 Alfalfa Soil Fertility Requirementsin North Dakota Soils  SF-1863 (Revised)
• Franzen, D.W. and Berti, M. 2023 Fertilizing Alsike Clover,Birdsfoot Trefoil, Red Clover andSweetclover in North Dakota NDSU Ext. Circ. SF-1865 (Revised)
• Franzen D.W. 2023 Developing Zone Soil Sampling Maps NDSU Ext. Circ. 1176-2 (Revised)
• Soil Fertility Recommendations for Field Pea, Lentil and Chickpea in North Dakota SF-725, 2023 (Revised). David Franzen, Professor Soil Science and Extension Specialist, North Dakota State University.
• Franzen, D.W. 2023.  Fertilizing Pinto, Navy and other Edible Dry Bean NDSU Ext. Cir. SF720 (Revised)
• Franzen, D.W. 2022 FertilizingHard Red Spring Wheatand Durum NDSU Ext. Circ. SF-712 (Revised)
• Franzen, D.W. 2022. Nitrogen Extenders and Additives  NDSU Ext. Circ. SF-1581.(Revised)
• Franzen, D.W. and Teboh, J.M. 2022 Soil Fertility Considerations for Buckwheat in ND. NDSU Ext. Circ. SF-724 ( Revised)
• D.W. Franzen. 2022 Fertilizing Sunflower NDSU Ext. Circ SF713 (Revised)
• Franzen, D.W. 2022 Soil Fertility for Corn  NDSU Ext. Cir. SF-722 (Revised)
• Spring Wheat active-optical ground-based sensor algorithms as tools for determining top-dress nitrogen rate2022 D.W. Franzen, H. Bu. NDSU Ext. Circ. SF1176-6
• Active-optical Sensor Algorithms for Corn Yield Predictions and as a Corn Side-dress Nitrogen Rate Aid 2022 D.W. Franzen, H. Bu. NDSU Ext. Circ. SF-1176(5).
• Spring wheat flag-leaf timing active-optical ground-based sensor algorithms to direct post-anthesis N application. 2022 D.W. Franzen, H. Bu. NDSU Ext. Circ. SF1176-7
• Sodicity and Remediation of Sodic Soils in North Dakota 2019 D.W. Franzen, N. Kalwar, A. Wick, T. Desutter SF1941
• Fertilizing Potato in North Dakota David Franzen, Professor Soil Science, Extension Soil Specialist, North Dakota State University; Carl Rosen, Professor, Department of Soil, Walter and Climate, University of Minnesota; and Andrew Robinson, Extension Potato Agronomist, North Dakota State University. NDSU Circ. SF-715, 2021.
• D.W. Franzen, C. Rosen, J. Sawyer, D. Ruiz-Diaz, K. Steinke, P. Scharf, M. Ruark, E. Nafziger, A. Margenot, E. Lentz, D. Kaiser, B. Maharjan, J. Camberato, E. Ritchie 2020 Effectiveness of Using Low Rates of Plant Nutrients. NDSU Circ. SF1978
•  G. Endres, H. Kandel, B. Schatz, M. Ostile, S. Yuja 2018 Pinto Bean Response to Phosphorus Starter Fertilizer in East-central North Dakota. NDSU Circ. A1883

• D. Franzen, C. Gasch, C. Augustin, T. Desutter, N. Kalwar, A. Wick 2019. Managing Saline Soils in North Dakota. NDSU Circ. SF-1087 (Revised)
• D.W. Franzen and H. Bu. 2018. North Dakota clay mineralogy impacts crop potassium nutrition and tillage systems. NDSU Ext. Circ. SF-1881.
• D.W. Franzen. 2018. Limitations of the sulfate-sulfur soil test as a predictor of sulfur response. NDSU Ext. Circ. SF-1880. 
• D. Franzen. 2018 What is site-specific farming? NDSU Ext. Circ. SF-1176(1).
• D. Franzen. 2018 Soil Sampling and variable-rate fertilizer applications NDSU Ext. Circ. SF-1176(2).
• D. Franzen. 2018 Yield Mapping NDSU Ext. Circ. SF-1176(3).
• D. Franzen. 2018 Site-specific farming 4. Economics and the environment  NDSU Ext. Circ. SF-1176(4).
• D. Franzen, 2018. Soil Sampling as a Basis for Fertilizer Application
• D.W. Franzen, 2019 Soybean Soil Fertility SF-1164 (Revised)
• Franzen, D.W. 2018 Fertilizing Winter Wheat NDSU Ext. Circ. SF-1448 (Revised)

• Thomas F. Scherer, David Franzen, and Larry Cihacek. 2017. Soil, water and plant characteristics important to irrigation. AE1675, NDSU Extension Service, Fargo, ND

• Corn Response to Phosphorus Starter Fertilizer A1851, 2017 Greg Endres, Ext. Cropping Specialist, David Franzen, Ext. Soil Science Specialist, Hans Kandel Extension Agronomist, Mike Ostile, Research Agronomist and Blaine Schatz, Carrington Ext. Director and Agronomist
• Franzen, D.W. 2017 Fertilizing Flax NDSU Ext. Circ. SF-717 (Revised)
• Franzen, D.W. 2017 Land Judging in North Dakota NDSU Ext. Circ. DBC618 (Revised)
• Franzen, D.W. 2017 Fertilizing Canola and Mustard NDSU Ext. Circ. SF-1122 ( Revised)
• Franzen, D.W. and R. Smith. 2014 Evaluating, Preparing and amending Lawn and Garden Soil. NDSU Ext. Circ. H-1325..
• D. Franzen, G.W. Rehm, and J. Gerwing. 2006. Effectiveness of gypsum in the North Central region of the U.S. NDSU Ext. Circ. SF-1321.
• D.W. Franzen. 1999. North Dakota survey of soil copper, pH, zinc, and boron levels. NDSU Ext. Report 52.
• Franzen, D., L.K. Sharma, and H. Bu.

Extension Programs:

• Annual Precision Farming Workshops (last Thursday in Feb, since 1995).
• Soil Science training seminars for agricultural professionals and producers. January, since 1995.
• Speaking presentations at Experiment Station Field days, county ag days, field tours, as requested and as possible to schedule. Approximately 60 each year.