Patricio Grassini - Cropping Systems Specialist

Patricio Grassini

(faculty)
Work PLSH 387
Lincoln NE 68583-0915
US
Work 402-472-5554 On-campus 2-5554

Faculty Bio

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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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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Chart of Nebraska & US corn yield trends (1971-2016)

Soybean and Corn Yield and Acreage Trends through 2016 May 25, 2017

Nebraska soybean and corn yields steadily increased from 1971 to 2016, in both irrigated and rainfed production fields. Charts based on USDA National Agricultural Statistics Service numbers track these changes.

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Yield Chart for 2016 Corn Yield Forecasts

Hindsight of 2016 Corn Yield Forecasts by the Yield Forecasting Center May 11, 2017

Here we provide an evaluation of the corn yield forecasts released during the 2016 crop season by the Yield Forecast Center. We compared our end-of-season forecasted yield potential against the average corn yields reported by USDA NASS for rainfed and irrigated production.

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Meat thermometer measuring soil temperature

Corn, Soybean Planting Considerations for this Week’s Cold Snap April 24, 2017

With nighttime lows predicted to drop several nights this week, growers are advised to cautiously assess the potential for germination problems due to imbibitional chilling before planting. Agronomists advise checking soil temperatures in each field the day of planting as well as forecast temperatures for 24 hours (soybeans) or 48 hours (corn) after planting.

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Corn and soybean fields
Nebraska research documents yield increases from using corn-soybean rotations.

Rotation Impact on Irrigated Corn and Soybean Yields in Nebraska February 23, 2017

On most Nebraska rainfed farms, soybean and corn are usually rotated. On irrigated fields, however, the rotation sequence tends to shift to more years of corn between soybean, and in some cases, corn is grown continuously, year-after-year.

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fertilizer applicator in the field
Nebraska research shows that most NE growers can reduce their normal nitrogen rate in corn following alfalfa by applying the proper N credit. (Photo by Laura Thompson)

Cutting Costs Without Hurting Yields? Check Fertilizer N Rates in Corn after Alfalfa February 22, 2017

With tight crop margins for the 2017 growing season, many farmers are looking for ways to cut input costs without hurting yields. One way to do this is by giving the appropriate nitrogen credit when calculating how much N to apply to corn grown after a prior alfalfa crop.

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