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Top Ag Agronomy Department


Top Ag is continuing to strive to become growers’ first choice in the area when it comes to your agronomic service and product needs. Our commitment to this goal will be accomplished by providing exceptional service, innovative programs, and competitive prices.

Our agronomy department consists of three base of operation locations including Okawville, Trenton, and Pierron. Along with the many services that we provide at each location (which are listed at the bottom right of this homepage) we also provide the R7 tool by Winfield, and Climate Pro by Monsanto. TOP AG ALSO PROVIDES DIFFERENT FINANCING OPTIONS FOR ALL AGRONOMIC PRODUCTS AT VERY COMPETITIVE INTEREST RATES!!!!

Some of the fertilizer products that we offer at each agronomy location are as follows: Anhydrous Ammonia 82-0-0, Liquid 28%, Dry Potash 0-0-60, DAP 18-46-0, Urea 46-0-0 and Limestone. Along with those main foundation products to a successful crop we also provide dry and liquid micro and macro nutrients that are vital to cropping systems which are focused on plant health, plant efficiency, and most importantly plant yield. These products can be purchased for application by the grower or by Top Ag custom application from a top of the line fleet.

Fertilizing your fields is obviously a critical step in producing a high yielding crop. Another building block to a highly productive acre is crop protection. Top Ag provides crop protection products from all of the leaders in the industry including: Winfield, Monsanto, Syngenta, Dow Agrisciences, Valent, Dupont, Bayer, and BASF. Use recommendation and effective product placement is key to a strong (weed free) crop. The recommendations and product placement come from an effective team of Sales Agronomists which include: Doug Horstmann (Trenton) and Tyler Gross (Trenton), Josh Tebbe (Pierron), Jeremie Stout (Okawville) and Andrew Rensing (Okawville). Along with the agronomists, Willie Harris (Top Ags’ Agronomy Manager) offers insight which is headed by 35 years of agronomic experience. 

Our growers are fortunate to get to choose from a variety of seed options when it comes to Corn, Soybeans, Wheat, and cover crops. These seed companies include: Croplan by Winfield, NK Mycogen, Dekalb, Asgrow, E-merge, Lacrosse, Agrimax and Agripro. Although we provide a range of different seed options the most important factor when it comes to seed is picking the right hybrid and placing it on the right acre. Top Ag agronomists provide placement of any seed on all acres at no charge by utilizing the R7 tool By Winfield.

Finally, Top Ag Agronomy provides soil testing and field mapping which can be integrated with our custom application equipment that is all equipped with GPS guidance and VRT (variable rate technology). For those growers that prefer to do their own application we provide anhydrous tanks and toolbars, and for application of dry fertilizer Top Ag also has a lineup of dry buggies at each location.


      Top Ag Agronomy Article


I found this article refreshing, it is straight forward and packs a punch without all the marketing rip rap! It is easy for us as growers to look at where we are in this tough market and make excuses to cut corners (costs). It is important to remember that in order to increase income we need to increase bushels! Enjoy!

DR. RANDY SIMONSON – HELENA AGRIntelligence Agronomist

Every growing season has challenges. This year was particularly hard with heavy rains keeping farmers out of the fields in many areas and causing record replanted crops. As I looked at fields this year, I found several common problems. Incorporated below are my recommendations for the Top 10 things we can do to minimize those problems and produce a better crop.

10- Use a starter on your corn crop. Every year someone creates an accidental test strip where starter isn’t applied to a row or two. These rows are typically very visible as they are much shorter and often yellow or purple in color. Starter helps give the plants the nutrients it needs to get up and going quickly. The faster corn gets out of the ground, the better.
9- Use an insecticide at planting. An insecticide in the planter will increase corn emergence. However, the main role is to kill insects that don’t have a rescue treatment such as white grubs, seed corn maggot and wireworms.
8- Compaction is stealing more yield than what we think it is. In field after field, I find roots that cannot spread out or move down in to the soil as they should to get to the water and nutrients that the crop needs.
7- Take soil and tissue samples. Fertility is important and deficiencies will cost growers money. Find out which nutrients are low in your soil and crop and correct the problems as soon as possible. Samples taken this year show that sulfur and boron deficiencies are on the rise.
6- Fertilize every crop every year. Fertilizer efficiency is important for getting the most bang for your buck. The more often fertilizer is applied, the more likely it is for the fertilizer to get into the crop and not be tied up in the soil. Foliar fertilizers are becoming more popular every year.
5- Scout fields. Insect and disease problems have been prevalent this year. Scouting fields helps determine if there are any problems that can be readily fixed. Some insects and diseases can be disastrous if they are not tended to immediately.
4- Everyone has soybeans cyst nematodes (SCN). SCN seems to be getting worse, and they can rob yields. Taking a few years off from planting soybeans will certainly reduce SCN numbers, however, an alternative would be to apply a seed treatment that helps control this issue.
3- Don’t plant in wet soil. Planting in wet soils causes sidewall compaction, and there is nothing that can be done to correct that later. It will affect the crop for the rest of the season.
2- Plant corn at about 1.75 inches. Most of the corn I have seen with problems this year was planted too shallow. Shallow planting increases stress, inhibits root development, and increases the possibility of damage from some soil applied herbicides. Nodal roots need deeper plant depth in order to develop below the soil surface. If they lack the proper depth, they will come out above the soil, reducing the plants ability to take up nutrients and water, and increasing the likelihood of the plants falling over.
1- Apply herbicides early and often. This year has posed quite a struggle with control of resistant weeds and poor weather contributing to the problem. A strong weed control program needs to be proactive in order to control these difficult weeds. A good program will include fall burndown, spring burndown with a residual herbicide, followed by a good post herbicide. “An ounce of prevention is worth a pound of cure.”

Every growing season teaches us something new. I hope this Top 10 list is a helpful roadmap of things to keep in mind as we close out this growing season and look ahead to another successful year!




Top Ag Agronomy Services

Anhydrous Ammonia

Custom Application
for Preplant
Custom Application
for Side Dress
NH3 Side Dress Applicator Rental
NH3 Delivery
NH3 Toolbar Rental




Custom Dry Application
VRT Dry Application
Custom Blending
Fertilizer Buggy Rental
Dry Fertilizer Delivery

Liquid Applications

Custom Liquid Application
Drop Spraying
Helicopter Aerial Application
Airplane Aerial Application
Chemical & Liquid Delivery 



Testing, Calibration & Seed

Soil Testing
Grid Sampling

Bulk Seed Treatment
Bulk Seed Delivery

Lime Services

Lime Hauling
Custom Applied Lime
VRT Custom Applied Lime


Agronomy Team Contacts

Name Title Phone Email
Willie Harris Agronomy Dept Manager 618-243-3356 or 618-534-8908 (cell)
Doug Horstmann
Agronomy Manager / Salesman, Trenton
618-224-7812 or 618-578-3349 (cell)
Andrew Rensing
Agronomy Salesman, Okawville 618-243-3353 or 618-795-2600 (cell)
Brandon Buss
Agronomy Salesman, Okawville 618-243-3391 or 618-314-2841(cell)
Tyler Gross
Sales Agronomist, Trenton
618-410-9467 (cell)
Josh Tebbe
Sales Agronomist, Pierron
618-654-9804 or 618-520-0437
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