Patricio Grassini - Cropping Systems Specialist

Patricio Grassini

faculty
Work Plant Sciences Hall (PLSH) 387
Lincoln NE 68583-0915
US
Work 402-472-5554 On campus, dial 2-5554

Faculty Bio

Map of the Corn Belt showing locations for the 2019 Corn Yield Forecasts
Map of the Corn Belt showing locations for the 2019 Corn Yield Forecasts

2019 Corn Yield Forecasts: Approach and Interpretation of Results

July 8, 2019
Agronomists address how the Corn Yield Forecast Center develops yield forecasts, what to expect during the growing season, and how to use the forecasts to inform farm decisions. Tables detailing soil types and crop management for each of the 41 locations are included.

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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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