Haishun Yang - UNL Associate Professor of Agronomy and Horticulture

N Management Decision Tree

Field- and Season-Specific N Rate Recommendation for Corn Using Maize-N Program

January 8, 2018
An article from the Proceedings of the 2018 Nebraska Extension Crop Production Clinics on using Hybrid-Maize software to enhance nitrogen management in corn.

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Map indicating how various Nebraska and Kansas sites are expected to vary from average yields.

2017 Corn Yield Forecasts as of September 20

September 21, 2017
Crop modelers wrap up their forecasts of rainfed and irrigated corn yields across the Corn Belt for 2017, noting above-average yields for about 80% of the irrigated sites and more than 60% of the rainfed sites. Irrigated yields ranged from 11%-17% over long-term averages at those sites and rainfed yields at those sites were 13%-40% above average. View data for all the sites.

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Forecast of end-of-season irrigated corn yields in Nebraska and Kansas

2017 Corn Yield Forecasts as of August 30

September 1, 2017
Forecasts for end-of-season corn yields improved across much of the Corn Belt since the early August forecast. View crop stage and yield forecasts as well as weather data. In Nebraska predictions are for near to above average corn yields for most sites, except northeast and northwest sites.

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Maps showing likelihood of yield deviations for rainfed corn at various sites.

2017 Corn Yield Forecasts as of Aug. 9

August 11, 2017
Corn yield forecasts for Nebraska sites indicate near-average to above average yields for most irrigated sites. There was much more yield variability for rainfed locations where three of the sites were forecast with a 50%-100% chance of below-normal yields and three were forecast for normal yields, while one was near average.

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Probability of yield deviation for normal for irrigated corn, model ran July 18, 2017

2017 Corn Yield Forecasts as of July 18

July 19, 2017
Corn growth stages are estimated for 41 sites in 10 states and yields are estimated for select irrigated and rainfed sites, based on the Hybrid-Maize model and input from specialists and educators across a 10-state area as of July 18, 2017. The authors note that these early season yield forecasts vary widely, particularly for rainfed fields, and may change considerably by end of season.

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Sample CornSoyWater Screen Message

CornSoyWater: Real-Time Aid for Corn and Soybean Irrigation Decisions

July 11, 2017
Use CornSoyWater and its app to monitor soil available water and crop water use and to identify fields where stress is likely occurring or will be occurring within the next three days. The tool is free, user friendly, and can help you monitor fields from a distance.

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Locations of 2017 Yield Forecasting Center sites

2017 Corn Yield Forecasts: Approach and Interpretation of Results

July 6, 2017
This article discusses data and data collection for the Yield Forecasting Center forecasts of crop phenology and yield for 2017, including a map of the site locations and specific data on crop management and soil types for each site.

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Center pivot irrigation of soybean
The online tool SoyWater can aid in staging crop growth stage of soybeans and scheduling irrigations at the right time for maximum efficiency and impact. ons and make the ones you do apply more efficient.

Using SoyWater to Schedule Irrigation and Monitor Soybean Stages to Guide Decision-Making

June 26, 2017
SoyWater is an online tool that, based on the information you input, can provide timely, field-specific irrigation recommendations to increase irrigation efficiency.

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