NutriVision Technology Handbook
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- Melina Blankenship
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1 NutriVision Technology Handbook
2 Getting at the Root of Plant Nutriton At WinField, plant nutrition is about more than fertilizer applications. It s about managing crop performance from start to finish with science-based technology and agronomic know-how. It s about uncovering exactly what plants in each field need and delivering precise recommendations that power the next yield bump. That s why we ve added NutriVision Technology to our suite of nutrient diagnostic tools. NutriVision Technology mimics root nutrient uptake, revealing how much of each nutrient is truly available to the crop. By combining NutriVision Technology with soil and tissue testing, you ll gain a deeper understanding of plant nutrition and help your customers realize the full potential of their genetic investments. 1
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4 The Science of Nutrient and Root Relationships NutriVision capsules contain mesh-encased resin pellets. These resin pellets are capable of exchanging cations (positively charged ions) and anions (negatively charged ions) with the soil, capturing soil nutrients in much the same way a plant root does. Ion-exchanging resins have been used and studied for more than a century. In the 1940s, agricultural scientists began working with resins when they noticed that soil sampling alone wasn t providing a complete picture of the true dynamic nature of nutrient and root relationships within the soil system. 3
5 Nutrient and Root Interaction NutriVision capsules adsorb potassium by exchanging positively charged ions with potassium in soil solutions made available through mass flow and diffusion. + only 2% of nutrients are taken up by direct contact. + 20% of potassium uptake occurs by mass flow when nutrients not tightly bound in soil are supplied to the root in water flow. + 78% of potassium is acquired by roots through diffusion movement of nutrients from areas of higher to lower concentration. 4
6 Why Crops Can Go Hungry Factors such as weather, pests, soil type and plant genetics all influence the amount of each nutrient available in a form that plants can access through their root systems. That s why tissue samples can reveal nutrient deficiencies even in crops planted in nutrient-rich soils. 5
7 nutrivision Tissue Sample Soil Sample Comprehensive Nutrient Analysis NutriVision Technology bridges soil and tissue sampling, providing a new opportunity to detect and fix nutrient deficiencies before they compromise yield. Soil sampling measures the total nutrients within the soil. NutriVision Technology identifies the portion of those nutrients available to plants. Tissue sampling reveals what nutrients plants have actually used. 6
8 Potassium: Basecamp for a Yield Quest From photosynthesis to protein building, water regulation to nutrient movement, potassium provides the foundation for plant growth and development. As corn yields reach 300 bushels per acre, nutrient needs intensify, making potassium supplies even more critical. Yet thousands of NutriSolutions Tool tissue samples collected from multiple geographies over the past five years have revealed significant potassium deficiencies in many crops a disturbing finding for farmers on a yield quest. Potassium availability fluctuates from tightly bound to readily available in the soil. Using NutriVision Technology, you can measure plant-available potassium before and after nutrient applications, allowing you to identify corrections that offer the greatest potential for enhancing your customers crop production results. Nutrients Needed for 300-Bushel Corn R. FLANNERY 308 Bu/A 400 NUTRIENT UPTAKE (LB/A) LB K 2 0/A/DAY 11LB N/A/DAY 2.85LB P 2 O 5 /A/DAY DAYS AFTER PLANTING
9 A Balancing Act Nutrient Universe MANGANESE (Mn) potassium (K) calcium (Ca) iron (Fe) copper (Cu) phosphorus (P) magnesium (Mg) boron (B) nitrogen (N) zinc (Zn) molybdenum (Mo) Many nutrients work together to fuel robust plant growth and development. As a result, you can t correct one nutrient without considering the affects this can have on the others. Unlike traditional soil sampling, NutriVision Technology adsorbs other nutrients while measuring potassium uptake, providing a realistic evaluation of conditions surrounding the root. 8
10 Get Started With NutriVision Technology 9
11 map the field Gather tools If using the R7 Tool Pro, identify sampling zones using the yield potential map. If using the R7 Tool, use SAMZ or the bare soil image to create zones. Select the correct image for sampling zones. This requires guidance from someone with direct knowledge of the field, such as the farmer. Images in the carousel may be ideal. These can be obtained in PDF form from the Info tab in the R7 Tool. If an acceptable image cannot be found in the carousel, more are likely available in R7 Tool Pro. Choose the two to four zones that represent 80 percent of the field as your sampling zones. 2 NutriVision capsules per zone 1 soil sample bag per zone* 1 tissue sample bag per zone* 1 soil probe marked at 3-inch intervals and water to rinse it between samples 1 rubber mallet to drive the probe into dry soils 2 plastic buckets, clearly labeled for shallow and deep soil samples 1 fine-tipped marker for labeling bags and cups *Minimum sample size. 10
12 Collect soil samples Sample soil at two depths in each location, getting as close to active root zones as possible. Keep the probe vertical and avoid going beyond the deepest measurement. In no-till fields, collect samples at depths of 0 to 3 inches and 3 to 6 inches. In conventional or strip tillage, collect samples at depths of 0 to 6 inches and 6 to 12 inches. While the soil is still in the probe, use a knife to separate the core into the appropriate length (3 or 6 inches, depending on field tillage). Place shallow and deep samples in separate, clearly labeled buckets. A total of 25 cores samples should be collected from each zone to create an accurate composite picture. When all samples have been collected, thoroughly mix the soil in each bucket. Collect TISSUE samples Collect one leaf from each soil sample location. Select the top, most recently mature leaves for the tissue sample. If plants are young or small, take two leaves per soil sample location. Place leaf samples in coded NutriSolutions bags. If using a mobile device to capture sample information, record data before leaving the sampling location. Reference The NutriSolutions Handbook for more information on soil and tissue sampling. * Refer to the NutriSolutions Handbook for more information on soil and tissue sampling. 11
13 Prepare nutrivision capsule paste After thoroughly mixing the soil in each bucket, make note of the labeled soil depths and set out the corresponding labeled NutriVision capsule cups. Remove the caps from the NutriVision capsule cups and use a plastic measuring spoon to add 3 tablespoons (50 g) of corresponding soil to the deionized water provided in each resin capsule sample cup. Mix well. Consider capping and shaking the cups between adding soil for optimum mixing. The paste should have the consistency of oatmeal, grits or thick pudding. Do not remove NutriVision capsules from cups. Do not add to or replace deionized water with any other type of water. Enter all required information on the NutriVision capsule submission form. bag soil and send samples for analysis If a traditional soil sample has not been collected from the field in the past six months, send the remaining soil in each bucket for analysis. Label and fill the sample bags, one for each sample depth. Repeat this process for each of the sampling zones, rinsing buckets between zones. Send soil, tissue and NutriVision capsule samples the same day or the following morning. If storing overnight, place in a cool, dry location. Send to: Sure-Tech Laboratories 2435 Kentucky Ave Building 6 Indianapolis, IN Please note: New customers must create an account number. Sure-Tech Laboratories is the only lab conducting NutriVision analyses. 12
14 Analyze results Individual results from soil, tissue and NutriVision capsule samples will give you a comprehensive analysis of each field along with detailed recommendations for optimum nutrient management. Your WinField regional agronomist or plant nutrition specialist is available to guide you and your customers through these findings. The NutriSolutions 360 o system to plant nutrition provides the insights you need to help your customers reach their next yield goal. Ask your WinField representative how you can get started with NutriVision Technology today to help your customers be greater. 13
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