Charles Wortmann - Extension Soil and Nutrient Management Specialist

Charles Wortmann

faculty
Work Keim Hall (KEIM) 369
Lincoln NE 68583-0915
US
Work 402-472-2909 On campus, dial 2-2909

Faculty Bio

Research Cited in CW
How Manure Impacts Soil Aggregation

Sampled wells and pivots map
Figure 1. Distribution of sampled wells and pivots.

Irrigation Well Water in Nebraska: Nutrient Concentrations and Other Properties

March 31, 2021
A 2020 survey on hundreds of irrigation wells in Nebraska provides insight on nutrients that enhance soil fertility across the state.

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Tractor in field
Anticipated high residual soil nitrate-N levels in Nebraska rainfed crops of dry 2020 may allow reduced N rates for 2021.

Q&As on Nitrogen Investment in Corn This Year

March 31, 2021
Most of Nebraska was drier than normal in 2020, which means a potential increase of residual nitrate-N. As such, producers may need to reduce fertilizer-N rates for 2021 — but how much is enough?

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Plowing a field
Anticipated high residual soil nitrate-N levels in NE rainfed crops of dry 2020 can be credited to reduce N rates for 2021

Planning 2021 Fertilizer-N Application Following a Dry 2020

October 6, 2020
Fertilizer-N is a big investment for crop production in Nebraska and elsewhere. After harvest, growers tend to plan their fertilizer-N management for the next year’s crop. But the question is how much nitrogen can they apply to get the most profit from their fertilizer-N investment?

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New NebGuide: Soil Microbiology in Nebraska

July 15, 2020
Soil microbiology is a universal and essential component of agricultural soils. This NebGuide provides basic information of soil microbiology, microbial functions, microbial enhancement, and microbial assessment.

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corn seedling with damage

Fertilizer-nitrogen Injury

May 22, 2020
Nitrogen (N) is the most limiting nutrient in corn. However, there is risk of crop injury with band application of fertilizer-N.

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nitrogen fertilizer being applied to corn
Photo by Richard Ferguson

Tips for In-season Nitrogen Management in Corn

April 29, 2020
This spring conditions are good for pre-plant fertilizer, but there are still considerations that justify shifting more nitrogen application to in-season versus pre-plant.

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Two Nutrient Management Decision Tools Updated

April 16, 2020
Recently, two nutrient management tools produced by Nebraska Extension have been updated and are now available.

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Proposed Changes to Nebraska Recommendations for Manure Nitrogen Credit

April 7, 2020
Managing manure for economic and environmental benefit is based, in part, upon our ability to efficiently recycle manure nitrogen (N) between animals and crops.

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