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In-Season Forecast of Soil Water-Nitrogen And Corn-Soybean Yields for Central and Northwest Iowa; August 12 Forecast

August 14, 2015
Corn and soybeans

For many farmers and agronomists, at this point in the growing season more thoughts move to determining realistic yield expectations. Making those yield estimates might be tough, especially for soybean, since both the corn and soybean crops are roughly halfway through grain fill.

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In-season forecast of soil water-nitrogen and corn-soybean yields for central and northwest Iowa; an update

July 31, 2015
Relative yield predictions for cropping systems in Iowa

By Mark Licht and Sotirios Archontoulis, Department of Agronomy

The corn and soybean crops are halfway through their life cycle and are currently in the most critical phase of growth. Final yields will be determined by a combination of soil-plant processes that are highly affected by the prevailing climatic conditions in August, existing status of the soil water and nitrogen reserves, biomass production and N uptake to date, and biotic factors such as insect and disease pressure.

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In-Season Corn and Soybean Forecast of Soil Water-Nitrogen and Yields for Central and Northwest Iowa: A Pilot Project

June 17, 2015
Info on eight cropping systems used in the pilot project

By Sotirios Archontoulis, Mark Licht and Ranae Dietzel, Department of Agronomy

Pilot project is using APSIM model to forecast soil water-nitrogen and end-of-season corn and soybean yields in central and northwest Iowa. The June 15, 2015 forecast indicates corn yields to be near the long-term average and soybeans to be slightly below the long-term average.

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