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Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist

Taking CO2 measurements in plots where residue has been baled

February 26, 2018

Corn Residue Removal and CO2 Emissions

By Manbir Rakkar - Doctoral Student, Humberto Blanco - Professor of Soil Science, Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Tyler Williams - Former Cropping Systems Extension Educator, Virginia Jin - USDA ARS Research Soil Scientist

cropwatch graphic

April 5, 2018

Alternative Nutrient Supply Products: Highlights of On-Farm Research Results

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Laura Thompson - Former Extension Educator, Jackson Stansell - On-Farm Research Assistant

cropwatch graphic

April 5, 2018

What’s New with P Fertilizer Use?

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist

cropwatch graphic

April 5, 2018

What’s New with K Fertilizer Use?

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist

cropwatch graphic

April 5, 2018

What's New with S Fertilizer Use?

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

cropwatch graphic

April 5, 2018

Nutrient Management for Organic Production

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist

Figure 1. Nebraska soybean field with patches of iron chlorosis caused by a deficiency of iron. (Photo by Rodrigo Werle)

April 10, 2018

What's New with Micronutrients?

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist

Figure 1. Coal combustion residue is being mixed into manure for land application.

April 11, 2018

Improving the Efficiency of Applied Organic N

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

Corn leaves showing signs of nitrogen deficiency

April 19, 2018

Nitrogen Fertilizer Stabilizers in Corn

By Leonardo Bastos - Agronomy Graduate Research Assistant, Bijesh Maharjan - Extension Soil and Nutrient Management Specialist, Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Richard Ferguson - Extension Soil Fertility Specialist

Figure 1. Land-applied manure from finishing 5 million beef cattle per year in Nebraska contains the equivalent of 150 lb/ac/yr N applied to 1.2 million acres.

January 8, 2018

Fertilizer N Substitution Values of Land-Applied Organic Materials

By Charles Wortmann - Emeritus Extension Soil and Nutrient Management Specialist, Tim Shaver - Extension Nutrient Management Specialist, Juan Pablo Garcia - Graduate Student, Charles Shapiro - Extension Soil Scientist—Crop Nutrition, Bijesh Maharjan - Extension Soil and Nutrient Management Specialist, Brian Krienke - Former Soils Extension Educator