Tyler Williams - Cropping Systems Extension Educator

Tyler Williams

(faculty)
Work
444 Cherrycreek Rd Lincoln NE 68528-1591
US

Blog: Ag Climate Nebraska

Twitter: @tylerw_unl

Map of the Midwest showing average date ranges for first 28°F freeze. (Source: Midwest Regional Climate Center)
Figure 1. Map of the Midwest showing average date ranges for first 28°F freeze. (Source: Midwest Regional Climate Center)

Average First Freeze Dates for Nebraska September 21, 2018

Statistics indicate that first freeze (28°F) trends for southeast Nebraska are changing, moving slightly later into the fall while those for northwest Nebraska, at the other end of the scale, are not changing. See average first freeze date ranges here.

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Nebraska map showing departure from normal precipitation

A Recap of Weather and Its Effects on the 2018 Crop Season September 20, 2018

Weather data and trends from April through August are reported here and help explain what you're seeing from the cab this fall.

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Nebraska precipitation map based on single point data

Why Do Precipitation Maps for the Same Date and Area Differ? June 28, 2018

Why do precipitation maps for the same storms sometimes appear to report different rainfall amounts? How can you determine which one to use when?

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Flooding and Ponding in Corn June 22, 2018

Ponding or flooding of fields affects corn differently at different stages, depending on duration of flooding and other factors. Growers should assess the potential for nitrogen loss and increase scouting for corn disease in these fields.

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Figure 1. The degree of damage from standing water in this field will depend on several factors and likely will lead to direct yield losses or indirect losses from increased disease pressure.

Flooding and Ponding in Soybeans June 22, 2018

Soybean plants are generally able to withstand a fair amount of flooding in the short term; however, diseases favored by wet conditions may become a problem for the rest of the season. Research shows the length of time the soil is wet and the type of soil will affect plant injury and survival.

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CO2 sensor in rye cover crop

Cover Crop and CO2 Emissions February 26, 2018

Do cover crops affect CO2 emissions from the soil and if so, under what conditions? These were among the questions addressed by university researchers monitoring CO2 emissions from cereal rye cover crops in irrigated and dryland no-till continuous corn treatments.

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Taking CO2 measurements in plots where residue has been baled
Taking CO2 measurements in plots where residue has been baled

Corn Residue Removal and CO2 Emissions February 26, 2018

University research looking at CO2 emissions from two types of residue removal (baling and grazing) compared with a control treatment found little day-to-day impact; however, when looking at cumulative data for the whole year, grazing did appear to affect cumulative CO2 emissions in irrigated crop-livestock systems. This data represents the first year of this study.

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Eastern Nebraska wheat field that yielded more than 110 bu/ac.
Figure 1. High yields (more than 100 bushels per acre) were harvested in some eastern Nebraska winter wheat fields this year.

Recap of 2017 Eastern Nebraska Winter Wheat Crop August 31, 2017

While final USDA yield numbers aren't in yet, it looks like 2017 wheat yields could rival the 2016 yields in portions of eastern Nebraska, based on state variety trials and extension educator reports. See the breakdowns by district.

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