Jim Specht - Emeritus Professor of Agronomy

Strategies for delayed soybean planting

Strategies with Delayed Soybean Planting June 13, 2019

Adjusting soybean planting practices (row spacing, seeding rate and the use of custom planting) and relative maturity of the variety can help maximize yield potential when planting after mid-June.

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Research plot with no-till corn residue, with left half planted to cereal rye in November 2018

Considerations when Planting Soybean Early April 25, 2019

If you're planning to get an early start on your soybean planting, be sure to check for recommended soil temperatures and the forecast for the coming 48 hours to ensure optimal conditions for achieving good emergence.

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Planter ready to enter the field.

Corn and Soybean Planting Considerations April 24, 2019

Planting sets the stage for a successful crop with an even emergence and stand. Consider these tips to help ensure you're providing favorable planting condition via proper soil conditions, planting window, planting depth, and seeding rates.

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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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Soybean research field

Field Case Study of Dicamba-Injured Soybeans using Forensic Analysis August 8, 2018

A field of dicamba-injured soybeans is used as an example to demonstrate the forensic analysis method to determine when dicamba exposure occurred.

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Chart showing rate of soybean node accrual

Are Your Soybean Plants Exhibiting Dicamba-Induced Leaf Injury? July 19, 2018

Learn how to examine plant development and use this forensic strategy to determine the approximate calendar date when the plants in your field were likely exposed to dicamba.

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Soybean leaf cupping

Understanding Growth Regulator Herbicide Injury July 19, 2018

There are now five structurally different growth regulator herbicides, each of which affects plant growth differently. Understanding the differences can help you better identify the cause when you find damage in your field.

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Figure 1. Planting into cold soil (below 50°F) when cold conditions are expected for the next 48 hours can lead to germination problems and seedlings not emerging or not emerging well. 1a. Corn seedling that started leafing out below ground and now has twisted leaves which will delay or negate normal plant development.. Figures 1b-c. Unemerged seedlings attempting to leaf out belowground. None of the seedlings shown should be counted as a productive plant.
Figure 1. Planting into cold soil (below 50°F) when cold conditions are expected for the next 48 hours can lead to germination problems and seedlings not emerging or not emerging well. 1a. Corn seedling that started leafing out below ground and now has twisted leaves which will delay or negate normal plant development.. Figures 1b-c. Unemerged seedlings attempting to leaf out belowground. None of the seedlings shown should be counted as a productive plant.

Cold Soil Temperature and Corn Planting Windows April 12, 2018

With stormy conditions back in the picture, many growers may be concerned about planting corn into cold, wet soils? By checking weather forecasts and soil temperature at planting (in the field and online) and the cold tolerance of seed, growers can identify 48-hour windows of opportunity for planting.

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