CFS TISSUE SAMPLE TRENDS
Dylan Barth, CFS Regional Sales Agronomist
Tissue samples are a great way to monitor Micro and Macronutrient status within a plant. Monitoring tissue samples throughout the growing season can allow insight into which nutrients are deficient, giving the opportunity to build plans and adjust inputs, helping a plant reach its full yield potential.
A question that many people have is when to sample. V5 is the best time to pull a tissue sample because that is the time when the plant is gearing up to grow the most. Samples pulled during this timeframe give a good picture of how the plant is sitting for nutrients. During V5, macronutrients N, P and K levels should be stable. The most common deficiencies we typically see in our territory are in zinc, boron and manganese, all micronutrients.
Past Corn V4-V6 CFS Tissue Sample Results:
If a plant comes back with a micro deficiency, there are a variety of Max-In products to utilize. Max-In products are absorbed into the plant almost immediately. Often at the V5 stage, a plant's roots are not large enough to take up the needed zinc from the soil, Max-In can be used to act as a bridge until the roots grow large enough to take up the nutrients needed.
If results show a Nitrogen deficiency, a side-dress application could be considered to help this issue. Sometimes even small adjustments can make a big difference. Results could be an insight for next season fertilizer inputs if it is too late in the season for this year. Depending on soil fertility, there has been varied success, with applying potassium in-season. It is not as common and could be a challenging thing to fix in-season.
Your CFS Regional agronomist can schedule tissue samples on your fields, evaluate nutrient levels throughout the season, to help create and adjust input plans to reach full yield potential.