As we progress through the reproductive stage of the growing season, many growers have reason for optimism in terms of yield. But, even for those who are having a good year so far, stress from excess heat can have a negative impact on the crop. Agricen’s Scott Lay sat with Dennis Michelsen of WITY Radio to discuss how TERRAMAR can be applied with fungicide to help protect existing yield potential from heat and other weather-related stress.

Dennis - WITY Radio: It’s been a weird year with the weather. I believe all of those different weather factors are adding to crop stress, and we've already had a prolonged period of hot nights.

Scott - Agricen: In the summer months, heat will happen in every zip code, in every crop. It's a matter of trying to protect the yield potential that exists. With TERRAMAR, we have a technology that can help minimize the impact of heat stress on a crop. It’s a good day for a crop if you can minimize the temperature within the crop canopy. What we're seeing in a number of replicated trials is that we can reduce the crop canopy temperature by two to four degrees Fahrenheit with TERRAMAR.

Dennis - WITY Radio: We know we're going to get more heat going forward. How much benefit is there to applying TERRAMAR with fungicides?

Wheat growers commonly apply fungicides to their crops to optimize plant health and yield. Typical application timings include early April after the flag leaves emerge (Feekes growth stage 9) and at heading shortly after (head scab application/Feekes growth stage 10.5.1). TERRAMAR can be utilized in the same pass as a wheat fungicide during any application timing, offering another stress-fighting and yield-enhancing tool to optimize crop yield potential.

What benefits can TERRAMAR add to a wheat fungicide application?

• TERRAMAR minimizes the impact of weather-related stresses (e.g., cold and dry conditions) to help maintain normal physiological functions. 
  
  
• TERRAMAR increases nutrient uptake and photosynthetic capacity at a critical time of yield determination.

Nutrien Ag Solutions has conducted multiple field trials in which TERRAMAR was applied at different stages of wheat growth with a fungicide. As seen in the examples below, consistent yield responses and a positive return on investment (ROI)* were observed across the different timings, whether one or multiple applications of TERRAMAR were made with the grower’s standard practice (GSP). 

FLAG LEAF/FEEKES 9 FUNGICIDE APPLICATION

How can farmers maximize every unit of UAN sidedress they apply to help them reach their maximum yield potential?

Watch our on-demand webinar, "Enhancing UAN Sidedress Efficiency to Optimize Corn Yield Potential," to learn:

• What conditions favor best responses from sidedress nitrogen applications
  
  
• How enhancing a sidedress nitrogen application can potentially help offset the impact of planting delays
  
  
• When growers should apply UAN sidedress for optimal benefits
  
  
• How EXTRACT PBA can maximize the impact of UAN sidedress applications to optimize corn yield potential

By Jeremiah Butler, Agricen

Early in the summer of 2023, widespread nutrient deficiencies were observed in the Corn Belt, particularly potassium (K) deficiency in corn. Due in large part to drier-than-average early season growing conditions, abiotic stress—or stress from environmental conditions—was more prevalent, impacting crop physiological development and reducing nutrient uptake during a critical phase.

Beginning in mid-June, a number of crop consultants were reporting an interesting phenomenon. Corn fields treated with a foliar application of TERRAMAR in the V3-V7 growth stage visually appeared to be healthier and were not exhibiting the same level of K deficiency symptoms as untreated corn.

As a result of these observations, trials were conducted on later-planted corn in Minnesota and Michigan, and on a soybean field in Indiana to evaluate the impact of a V4 application of TERRAMAR on nutrient uptake and abiotic stress reduction. Corn nutrient demand significantly increases after the V4 window to produce a healthy, high-yielding crop.

In the Minnesota trial, a foliar application of TERRAMAR (1 quart/acre) was made at V4, followed by rigorous tissue sampling to determine nutrient uptake levels of treated versus untreated plants. A total of 135 tissue samples were taken at the V9 growth stage (10 days after application) hourly over a 12-hour period (7 am to 7 pm). In addition, leaf surface temperature readings of treated and untreated plants were taken to evaluate canopy temperatures. Higher ambient air temperatures during the trial period were an indication that the corn crop was experiencing moderate heat stress.

Compared to the untreated corn, TERRAMAR increased the uptake of the majority of nutrients into the corn leaf tissue (Fig. 1). Potassium uptake was particularly notable, showing a 38% increase compared to the untreated corn.

As growers finish putting this year’s crop in the ground, Agricen’s Scott Lay spoke with WITY Radio’s Dennis Michelsen about TERRAMAR, a foliar product designed to help crops increase nutrient uptake and better tolerate weather-induced stress.

Dennis - WITY Radio:It’s impossible to predict the weather long term, but we know that something will always put our crop under stress every growing season. Would it be fair to say that the main reason a producer would want to add TERRAMAR to their lineup is to reduce stress?

Scott - Agricen: That is the essence of it. Weather-induced stress is one of the greatest yield robbers that farmers face. Up until this point, short of going to church on Sunday and praying for more moderate temperatures and rain, there's not been a heck of a lot we could do to address stress.

TERRAMAR was new to the row crop market last year, during which nearly 2M acres were treated. It does two things. One, it has a biologically extracted kelp component that minimizes the effects of weather-related stress, such as heat, drought or early season cold. Secondly, it has a biologically extracted carbon component that stimulates the plant to pull in more nutrients to aid in chlorophyll production and photosynthetic capacity, as well as increase carbon fixation in the plant. In this way, TERRAMAR provides a one-two punch that equals a better chance for yield at harvest time.

By Brian Cornelious, PhD, Agricen

The use of starter fertilizer, aimed at getting plant nutrients in a concentrated zone close to the point of seed placement, is a common practice in some parts of the country.

A standard starter program for corn in the U.S. Corn Belt is 3-5 gallons of ammonium polyphosphate (10-34-0) plus 1 quart of zinc per acre. More progressive growers have gravitated towards readily available orthosphosphate blends containing micronutrients or other enhancements like biostimulants. Regardless of the rate, timing, source and amount (the “4Rs”) of the practice, the goal is the same: Get the most out of every nutrient applied for better early growth and development.

Conversion from polyphosphate to plant-available orthophosphate takes place in the soil, where microbes and soil chemistry both play a role in making the applied and existing soil nutrients available to the plant, as well as in the timing of nutrient release into the soil solution. For any liquid starter program to be successful, growers must consider several key factors like soil test values, crop yield goals, field conditions and potential for nutrient release when the crop needs them most.

Whether conditions are “ideal” or stressful, the key is to be prepared for whatever the growing season brings so that you can reach your yield goals.

In this on-demand webinar hosted by CropLife, "Stand Up to Stress for Higher Yield & ROI," you'll learn:

• What abiotic stress is
  
  
• How ag biologicals and biostimulants fit into crop stress and plant health management programs
  
  
• How TERRAMAR, a new foliar technology for agricultural crops, enhances plant performance while mitigating the impacts of abiotic stress

More than three dozen farmers in the 2023 National Corn Growers Association (NCGA) Corn Yield Contest used Agricen's biocatalyst technologies in their winning programs. They include four farmers who took top places at the national level and 34 who took top places in their states. 🏆

The winning growers used one or more of the following products in their corn fertility programs: Accomplish MAX, Ensurgo, Extract PBA, Levitate, Maritime, Prologue, Terramar and Titan XC. All of these products are exclusively available from our partner, Loveland Products, through Nutrien Ag Solutions.

By Ronald Calhoun, PhD, Loveland Products

Crops need phosphorus (P) early in their development to help them get off to a good start. This important macronutrient not only helps them capture and convert sunlight into useful plant compounds, it also assists with plant growth, stalk strength and early root growth and development.

One challenge that growers need to think about each season is that phosphorus availability can be limited by soil fixation, poor root growth and cold temperatures that limit microbial activity. Much of the phosphorus that is applied each season is at risk of fixation with elements in the soil like iron (Fe), aluminum (Al) and calcium (Ca). Once those bonds have formed, the bound phosphate becomes essentially unavailable to the growing crop. For these reasons, it is difficult to access phosphate in the soil bank, making applied phosphate relatively inefficient.

Along with phosphorus, plants also need zinc (Zn). Zinc plays a role in the manufacturing of plant hormones that help drive root growth. It also has a unique relationship with phosphorus, interacting with phosphate to influence root growth. These two nutrients work best when they are available in a ratio in which neither one is limiting the other. Unfortunately, prevailing spring conditions, like cool temperatures and waterlogged soils, can limit the availability of zinc.

PROLOGUE (5-0-0 6.3% Zn) is a unique technology designed to enhance phosphate nutrition for a higher performing and more sustainable approach to crop nutrition. In the trial below, adding PROLOGUE to 10-34-0 starter led to an average yield increase of +8.9 bushels per acre across six sites.

How can growers get the maximum benefit from existing and applied nutrition to maximize their yield and return on investment?

Watch our on-demand webinar, "Early Season Opportunities to Enhance Nutrient Availability with EXTRACT PBA," to see:

• How Extract helps unlock the nutrition crops need from the soil, organic and inorganic nutrient applications and the previous season's crop residue for maximum yield
  
  
• How to get the most utilization out of applied and residual nutrition with Extract
  
  
• Results from corn, soybean and wheat trials