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

Ismail Dweikat, University of Nebraska-Lincoln professor of agronomy and horticulture, has been researching hemp production in small plots for the last two crop seasons.
Figure 1. Ismail Dweikat, University of Nebraska-Lincoln professor of agronomy and horticulture, has been researching hemp production in small plots for the last two crop seasons.

Hemp Production in Nebraska - Revised

March 25, 2020
Is hemp on your horizon as a new crop for your rotation? In this, the first of three stories on the topic in this week's CropWatch, two agronomy professors outline key production information, often drawn from research in other states and countries.

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Figure 1. Hemp variety best suited for CBD production.
Figure 1. Hemp variety best suited for CBD production.

Hemp Production for CBD - Revised

March 25, 2020
Research from other states and countries offers some insight into practices for growing CBD hemp in Nebraska. CBD hemp is a high-value crop that's labor-intensive and often grown more as a horticultural than as an agronomic crop.

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Industrial hemp research plot

Hemp Production for Fiber or Grain - Revised

March 25, 2020
Information for those considering growing hemp for fiber or grain in Nebraska, including a Q&A and sample production budgets from other states.

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Nebguide g2322

New NebGuide - Crop Management to Reduce Soil Nitrous Oxide Emissions in Nebraska

February 24, 2020
A new NebGuide, G2322, authored by Bijesh Maharjan, Virginia Jin, Laila Puntel, Javed Iqbal, Tyler Williams, Humberto Blanco and Charles Wortmann, is available in both html and PDF formats.

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Manure Nitrogen Use for Increased Profit and Environmental Protection

February 5, 2020
Land application of manure and other organic materials supplies much N to Nebraska’s crop production. In contrast to most other nutrients applied in organic materials, the availability of manure-N and its fertilizer-N substitution value is not well-predicted.

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tractor filling a field

Strategic Tillage for the Improvement of No-Till Cropping Systems

January 21, 2020
The practice of OT once in 5 to 10 years or more is not likely to adversely affect no-till systems. However, to be beneficial, the OT has to be well-planned and implemented to target a well-characterized problem such as a weed control or compaction problem.

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Figure 3

Agronomic Management for Reduced Nitrate Leaching

January 7, 2020
The leaching of nitrate to groundwater and the increasing occurrence of groundwater with excessive nitrate levels for human consumption is a major concern in Nebraska. The amount of leached NO3- depends on soil NO3- concentration at different soil depth layers and the quantity of water movement downward through these soil layers to beyond the root zone.

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watering cornfield

Crediting Essential Nutrients Applied in Irrigation Water

December 18, 2019
Crediting some of the nitrate-N applied in irrigation water for determination of fertilizer-N rates has long been advised in Nebraska.

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