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Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist

Baled soybean residue in a field

December 13, 2018

What is the Value of Soybean Residue?

By Jenny Brhel - Extension Educator, Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Mary Drewnoski - Beef Systems Specialist, Keith Glewen - Extension Educator Emeritus, Randy Pryor - Extension Educator, Todd Whitney - Extension Educator

cropwatch graphic

January 10, 2019

Fertilizer Recommendations for Soybean Updated

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Brian Krienke - Former Soils Extension Educator, Bijesh Maharjan - Extension Soil and Nutrient Management Specialist

Chart of nitro use efficiency and partial profits

January 9, 2019

Profit and Nitrogen Use Efficiency Gain Using Sensor-Guided Fertigation

By Brian Krienke - Former Soils Extension Educator, Richard Ferguson - Extension Soil Fertility Specialist, Suat Irmak – Professor of Agricultural and Biological Engineering, Pennsylvania State University, Daran Rudnick - Former Extension Irrigation Management Specialist, Charles Shapiro - Former Extension Soil Scientist—Crop Nutrition, Tim Shaver - Extension Nutrient Management Specialist, Keith Glewen - Extension Educator Emeritus, Bijesh Maharjan - Extension Soil and Nutrient Management Specialist, Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Mohammed Naser - Graduate Student

Chart of grain yield (averages for 15 site-years) with five P application practices.

January 9, 2019

Fertilizer P for Corn: Update of Research Findings and Revised Recommendations

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Bijesh Maharjan - Extension Soil and Nutrient Management Specialist, Brian Krienke - Former Soils Extension Educator

Routes of nitrogen loss in the soil

January 14, 2019

Nitrogen Inhibitors for Improved Fertilizer Use Efficiency

By Richard Ferguson - Extension Soil Fertility Specialist, Bijesh Maharjan - Extension Soil and Nutrient Management Specialist, Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Brian Krienke - Former Soils Extension Educator

Figure showing the marginal net returns to N fertilizer application for irrigated corn following corn and corn following soybean. The analysis was done for $4/bu corn and fertilizer costs of 7 lb N and 9 lb N equal to value of one bushel of grain or of $0.57/lb N and $0.44/lb N, respectively.

February 5, 2019

Effects on Profitability and Nitrogen Loss from Reducing N Rate for Corn

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist

Nebraska map showing departure from normal precipitation in inches for the last 6 months (9/25/2018 through 3/24/2019, generated on 3/25/2019 at HPRCC)

March 26, 2019

Topdressing Winter Wheat with Fertilizer Nitrogen

By Bijesh Maharjan - Extension Soil and Nutrient Management Specialist, Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Karen DeBoer - Former Extension Educator, Brian Krienke - Former Soils Extension Educator, Nathan Mueller - USDA NRCS, State Soil Health Specialist

cropwatch graphic

March 29, 2019

Nutrient Management Issues for 2019

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Bijesh Maharjan - Extension Soil and Nutrient Management Specialist

cropwatch graphic

March 29, 2019

A New NebGuide: Perennial Grass or Grass-Legume in Rotation with Annual Crops

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Bruce Anderson - Emeritus Extension Forage Specialist, Daren Redfearn - Extension Forage Crop Residue Specialist

Graph showing hypothetical illustration of variability of N loss.

April 3, 2019

Overall Efficiency of Fertilizer Nitrogen Use for Corn Production in Nebraska

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Richard Ferguson - Extension Soil Fertility Specialist, Jim Schepers - Emeritus Professor of Agronomy and Horticulture, Bijesh Maharjan - Extension Soil and Nutrient Management Specialist, Brian Krienke - Former Soils Extension Educator

Spring fertilizer application

April 11, 2019

More on Nutrient Management for 2019

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Bijesh Maharjan - Extension Soil and Nutrient Management Specialist, Brian Krienke - Former Soils Extension Educator

cropwatch graphic

April 18, 2019

Improving Manure Nitrogen Use Efficiency

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Juan Pablo Garcia Montealegre - Former PhD student, Rich Little - Farming Systems Research Technologist, Aaron Nygren - Extension Educator