Patricio Grassini - Cropping Systems Specialist

Patricio Grassini

Faculty Bio

Figure 1. Distribution of survey fields across the north central US. Red circles denote individual fields and the green area shows the region of soybean acres. (Source: USDA-NASS. (2019) USDA-National Agricultural Statistics Service (NASS), National Cultivated Layer).
Figure 1. Distribution of survey fields across the north central US. Red circles denote individual fields and the green area shows the region of soybean acres. (Source: USDA-NASS. (2019) USDA-National Agricultural Statistics Service (NASS), National Cultivated Layer).

Major Causes of Soybean Yield Gaps in Nebraska and 9 Other States Identified April 15, 2019

A four year study in Nebraska and other north central states found that planting date was a leading factor explaining the gap between current soybean yield and potential yield. The gap ranged from 11% in irrigated fields in south-central Nebraska to 21% in dryland fields in eastern Nebraska.

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Extension Educator Nathan Mueller and grower Ryan Siefken scout an on-farm soybean research plot in eastern Nebraska. (Photo by Laura Thompson)
Extension Educator Nathan Mueller and grower Ryan Siefken scout an on-farm soybean research plot in eastern Nebraska. (Photo by Laura Thompson)

20 Growers Sought for Soybean Yield Gap Study February 8, 2019

The Nebraska On-Farm Research Network (NOFRN) is seeking 20 farmers to participate in a study of how to optimize soybean yields. Here's more on the practices being studied and what's needed from the growers and the university researchers.

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Map indicating end-of-season deviations from average corn yields for select sites in the Corn Belt
Map indicating end-of-season deviations from average corn yields for select sites in the Corn Belt

Oct. 16 Corn Yield Forecast - End of Season Report October 19, 2018

The end-of-season corn yield report finds that high temperatures during vegetative stages had little impact on forecasted yield potential. This is the final article in the series looking at simulated crop stages and yield forecasts for 41 locations across the US Corn Belt.

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Map of the Corn Belt showing sites with above-, near-, and below-normal forecasted corn yields for 2018.

Aug. 22 Corn Yield Forecast: Shorter Crop Cycle Did Not Lead to Below-Average Yield August 23, 2018

Corn progress and yield forecasts for 41 sites across the Corn Belt indicate near- or above-average yields for most sites. High temperatures early in the season increased the rate of corn development and led to a shorter crop cycle, but do not appear to have diminished yields.

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Chart of Nebraska corn yields trends from 1971 to 1917.

Soybean and Corn Yield and Acreage Trends August 15, 2018

Nebraska soybean and corn yields have steadily increased from 1971 to 2017 in both irrigated and rainfed production systems. Nebraska irrigated soybean increased at a linear linear rate of 0.68 bu/ac, and irrigated corn increased at a rate of 2.17 bu/ac.

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Corn field
Rainfed corn near Grant, planted about May 27. (Photo by Alexander Tonon Rosa and Italo Kaye Pinho de Faria)

2018 Corn Yield Forecasts: Physiological Maturity Expected Before Historical Averages August 2, 2018

Corn growth simulations across the Corn Belt indicate early corn maturity of one to two weeks for most sites. Simulated corn yields for rainfed and irrigated sites across the region near or above normal at most sites.

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Corn plots 7-9-18
Corn plots at the South Central Agricultural Laboratory near Clay Center on July 9, 2018. (Photo by Roger Elmore)

2018 Corn Yield Forecasts as of July 11: Higher Temperature Led To Faster Corn Development July 13, 2018

Corn yield forecasts and crop growth stage estimates for the US Corn Belt, based on crop modeling and local input, start up this week for 2018. Corn development is well ahead of normal, with most sites in the central and southern fringes of the Corn Belt in the silking or grain-filling stages.

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Yield forecast locations

2018 Corn Yield Forecasts: Approach and Interpretation of Results June 29, 2018

Here's how the Yield Forecasting Center will be developing corn yield forecasts for 41 locations across the Corn Belt during the 2018 crop season. Modeling, using Hybrid-Maize, weather data, and on-site verification help researchers estimate yields so growers can adjust management during the season, if necessary.

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