Jack Larson Seeds Grain

Application of Starter Fertilizers in Corn

By Johnny | January 18, 2019

Starter fertilizers help mitigate slower or sub-optimal growth rates, decreased mineralization in soil, and lack of nutrient mobility common in cool, wet soils.

agKnowledge Spotlight- Managing Late Season Soybean Issues

By Johnny | August 16, 2018

Managing Late Season Soybean Issues The soybean reproductive stage R4 or full pod is the most crucial period for determining yield potential. Plant stress that limits seed number and/or seed size during full pod can results in more yield loss than at any other time. In order to make timely decisions that may help protect soybean yield […]

agKnowledge Spotlight- Estimating Corn Yield Potential

By Johnny | August 9, 2018

Estimating Corn Yield Potential Estimating corn yield potential can assist with harvest decision-making. The yield component method can be used as early as the R3 (milk) growth stage. The ear weight method is used once corn is physiologically mature. Historical, normal growing degree units (GDU) averages can be used to determine the approximate time between […]

Jack Larson Seeds and Crop Insurance Logo - Corn

GDU Update (August 8th, 2018)

By Johnny | August 8, 2018

As the warmer weather has continued for the past few weeks, you will notice that the GDU’s have continued to be ahead of normal! The way the weather forecast looks, we should continue the trend. Just a reminder that we will be at Farmfest all week in the Dekalb/Asgrow tent. Stop by and grab a […]

GDU Update (June 29th, 2018)

By Johnny | June 29, 2018

After a VERY warm start to the growing season, you will see that we are well ahead of GDU’s (even with a later planting window this season!) With a May 1 planting date, we should start seeing some tassels pop on a few earlier hybrids of corn in the next week to 10 days if […]

Agronomy Update 6/21 (Denitrification)

By Johnny | June 21, 2018

We’ve been receiving some questions regarding areas of “yellow” corn the past few weeks, especially in fields that had looked quite well earlier in the season. Why? Where rain has been prevalent the past few weeks, as in many fields around the area, soils are quickly becoming and/or staying waterlogged. Many microbes in the soil […]

Winter Agronomy Meetings (THIS WEEK)

By Johnny | February 27, 2018

Click HERE for the Winter Agronomy Meetings this week in Wilmar, Redwood Falls, or Worthington. All of these meetings will cover the same topics, just different locations. Let us know if you have any questions!   WINTER AGRONOMY MEETINGS February 28th: 2:00 PM ­ 5:00 PM (Snacks/Appetizers Provided) Willmar Conference Center 240 23rd Street SE […]

Dicamba Training Sessions

By Johnny | January 29, 2018

Below is a link for Dicamba Training Sessions in our area. It is required for anyone who is doing the actual spraying of the Dicamba products to attend one of these meetings. Let us know if you have any questions! Here is the answer to the question, “Who needs training?” Directly off of the website: […]


By Johnny | October 17, 2017

Click HERE for the link to our plot results. These can always be found by looking under the “Seeds” tab in the main menu! Let us know if you have any questions.   Test Plots CURRENT YEAR (2018)

agKnowledge Spotlight: Identifying Stalk Rot and Managing Potential Lodging Issues

By Johnny | October 13, 2017

Identifying Stalk Rot and Managing Potential Lodging Issues Lodging complicates corn harvest and can lead to yield loss and storage issues. Factors contributing to ear drooping and stalk lodging in corn include high winds, stalk cannibalization, and stalk rots. Understanding some of the contributing factors and how to most effectively manage the harvest and storage […]

September 20th GDU UPDATE

By Johnny | September 20, 2017

GDU UPDATE AS OF September 20th, 2017 April 15th thru September 20th, 2017: 2455 GDU’s (Compared to 2757 in 2016) May 1st thru September 20th, 2017: 2387 GDU’s (Compared to 2625 in 2016 and 2438 Historically) May 15th thru September 20th, 2017: 2215 GDU’s (Compared to 2500 in 2016) June 1st thru September 20th, 2017: 2066 GDU’s (Compared to 2234 in 2016) The past few […]

GDU UPDATE (September 6th)

By Johnny | September 6, 2017

GDU UPDATE AS OF September 6th, 2017 April 15th thru September 6th, 2017: 2185 GDU’s (Compared to 2467 in 2016) May 1st thru September 6th, 2017: 2117 GDU’s (Compared to 2335 in 2016 and 2234 Historically) May 15th thru September 6th, 2017: 1948 GDU’s (Compared to 2211 in 2016) June 1st thru September 6th, 2017: 1799 GDU’s (Compared to 1947 in 2016) We are […]