With the rough start to our region’s growing season, we need to start thinking about keeping our fields strong and healthy all the way to harvest. With favorable weather this growing season we still have the potential to grow a high yielding crop, despite being planted late. Below are fungicide efficacy ratings for several products out on the market, as well as a link to the UNL plant disease website. If you have any questions regarding disease problems in your fields, contact your Hoegemeyer product agronomist for help determining the best plan of action.
This spring has been a whirlwind of weather patterns throughout our region. While many farms have corn and even soybeans out of the ground, and others are still weeks away from planting, knowing your options for the possibility of a replant before that seed gets put into the ground can ease some tension if the problem may arise.
First and foremost, know that as a 100% by-crop customer of Hoegemeyer that is planting products with the LumiGEN™seed treatment, you have the opportunity to get your replant seed for FREE*. Even if you are not a 100% customer, know that, under some conditions, you may still have this opportunity. Speak with your DSM or Agronomist to learn more.
It is also important to consider the potential for yield loss from delayed planting due to replant. The possibility of a reduced stand in your first planting may still be more feasible than the potential yield loss due to a shorter growing season that your replant seed will have to deal with. While every situation is different, the main points to consider no matter what weather or planting situation you’ve been dealt is outlined below.
Planting date - and possible planting date of the replant
Expected stand loss
Hybrid or variety planted
Soil conditions that may hinder any growth problems into the future
In summary, if you feel you may need to replant or have unexpected stand loss, don't hesitate to reach out to your local Hoegemeyer representative so we can evaluate options. Evaluating and resolving these issues as early as possible will get you on track to having the best opportunity for a successful crop.
- Jonathan Williams, Southern Team Product Agronomist
*Refer to 2018-19 Hoegemeyer Business Manual for specific Replant Program Guidelines
Components of LumiGEN technologies for soybeans are applied at a Corteva Agriscience, Agriculture Division of DowDuPont production facility, or by an independent sales representative of Corteva Agriscience or
its affiliates. Not all sales representatives offer treatment services, and costs and other charges may vary. See your sales representative for details.
Seed applied technologies exclusive to Corteva Agriscience and its affiliates.®, TM, SM Trademarks or Service Marks of Dow AgroSciences, DuPont or Pioneer and their affiliated companies or respective owners.
Categories:Corn, Replant, SoybeansComments:0Tags:
Corn, Corn and soybeans, Jonathan Williams, LumiGEN seed treatment, replant guidelines, Soybeans
Anhydrous Ammonia, commonly called NH3, is one of the most commonly used sources of Nitrogen used by corn growers. NH3 is applied by injecting the gas into the soil 8-10” deep, a minimum of 5-7 days before planting. It is preferred to apply NH3 in the fall, if time and mother nature allows. Unfortunately the fall of 2018 made this a very challenging task. Spring-applied NH3, which carries more risk, is necessary when fall applied is not an option. Please take these items into consideration when using spring-applied NH3.
Applying the ammonia at an angle or parallel with the corn row at least 4-5 inches to the side will minimize the potential for seedling injury.
Distance and time: The further the application from the seed and the longer you wait to plant, the better for the germinating seedling.
If you can’t wait 5-7 days after NH3 application to plant, apply the ammonia as deep as possible (8-10”).
Anhydrous Ammonia when injected into wet soils and not applied deep enough can cause injury and stunting of seedling corn roots (Figure 1). Most of the Western Corn Belt is experiencing a wetter-than-normal spring. NH3 applied to wet soils can cause sidewall compaction which can let the anhydrous ammonia move up the application channel into the seed zone. When this is done, you have the potential to have root burn like shown in the photo above. Corn plants that appear wilted and spindly (Figure 2) are a symptom of anhydrous injury to the roots.
Growers who are using high-speed, low-draft applicators don’t have the option to place anhydrous ammonia 10” deep. Research has shown that applying high rates of nitrogen with these systems can result in significant seedling burn if planting directly over the injection zone (Fernandez et al., 2011).
Applying anhydrous ammonia well in advance of planting allows for the NH3 at the injection point to be converted to NH4+. Five to seven days or longer is the standard recommendation between application and planting, but free ammonia will persist longer in cooler drier soils. Reducing risk of injury involved separating the ammonia from the seed/seedling by either time or distance.
When spring seems later than usual, it is very tempting to sneak out into the field early and get your Nitrogen on. Please ensure the soil is dry enough and the applicator is applying 8-10” deep when you apply anhydrous ammonia. Keeping stress off these emerging seedlings will lead to higher yields in the fall. Waiting until field conditions are right will give your corn crop the best chance to succeed this year.
- Eric Solberg, Eastern Region Product Agronomist
Source: Fernández, F.G., D.B. Mengel, and J.E. Sawyer. 2011. Some things to consider for shallow placement of anhydrous ammonia. Proc. of the 2011 Wisconsin Crop Management Conference, Vol. 50
Categories:Corn, Eric Solberg, ManagementComments:0Tags:
2019 Planting, Anhydrous Ammonia, corn, Corn Seedling Injury, Eric Solberg, Management, NH3
I don’t know about you, but spring planting season is probably the part of the job I enjoy the most. As we move from winter into spring and it starts to green up, getting out in the field again is always a great feeling. So far, the spring of 2019 has brought below average temperatures for the majority of February and March. Mother Nature has just had a hard time coming out of winter, but it's looking like a warm up is on the horizon. Here are some items to watch out & consider as you begin spring planting 2019:
Soil Temperature @ 50 Degrees: A good rule of thumb for when to start planting corn is when soils reach an average soil temperature of 50⁰or above every morning at 7:00 A.M. for a week. When soils are cooler than 50⁰, typically emergence will be delayed for a few weeks. The longer the seed sits in cold soils, the more potential for exposure to pathogens, reducing the chance of germination.
Imbibitional chilling: Imbibitional chilling occurs when seed is planted, begins to germinate and then the soil temperature drops below 50⁰. This will typically happen if seeds are planted into soil above 50⁰ and then we catch a cold rain, freezing rain or a snow storm that brings to soils temperature down. Imbibitional chilling causes cells to rupture leading to corkscrewing of the mesocotyl. This can either delay emergence or possibly inhibit emergence if the coleoptile can’t get through the soil surface. Other symptoms of imbibitional chilling include aborted radicles, proliferation of seminal roots, delayed seedling growth and potential for disease pathogens to attack the young seedling.
Sidewall compaction: Planting into fields that are too wet will typically cause sidewall compaction. Even waiting an additional 24 to 48 hours can reduce the potential for sidewall compaction. Remember we only get one chance to plant most fields so waiting for soils to dry out can make a big difference in a field’s yield potential.
Planting season only comes once a year and there is nothing more important for setting ourselves up for maximum yields than getting a good even stand on all of our acres. So, be patient- wait until soils are fit for planting, make sure soil temperatures are sufficient, and delay planting if the forecast calls for cool wet weather. These tips will help avoid early season problems in our fields and get your seed started off on the right track.
If you have any questions feel free to contact your local Hoegemeyer DSM or Agronomist.
-Craig Langemeier, Western Region Product Agronomist
This Spring is not being overly cooperative to most of Hoegemeyer’s footprint, the Western Corn Belt. In the coming weeks, the ground will slowly start to dry out and warm up, we feel it’s an important reminder that the planting date may not be as important as making sure soil conditions permit a healthy, unharmed stand of crops.
Several problems may surface when corn is planted into inadequate conditions. These problems can also cause a ripple effect long into the growing season.
Sidewall compaction has a big effect on both nutrient uptake and root strength. While we normally relate sidewall compaction to nutrient uptake and stunted growth, it can also be highly detrimental later in the year due to root lodging from insufficient root growth. Sidewall compaction is more of an issue in heavier soils, so if you have highly variable soils in your area it is important to keep that in mind.
Many seedling diseases enjoy the wet environment a lot of corn may be planted into this Spring. While our standard LumiGEN™ seed treatment can considerably control many of these diseases, it is important to remember that these cool, wet conditions do not help its case.
We understand it is hard to stay out of the field and lay idle after that first-planting insurance date passes, but the yield loss from compaction and diseases will be much higher than the lost GDUs from trying to get the corn planted early. Be patient and make sure your fields’ moisture conditions are right and soil temperatures are at least 50 degrees Fahrenheit consistently throughout the field to ensure a quick and even emergence.
-Jonathan Williams, Southern Product Agronomist
Planting into Cold Soils