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How to Visually Diagnose Hidden Hunger and Mineral Imbalances

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All crops experience hidden hunger and nutrient imbalances which limit yield. Hidden hunger is a term used to describe a plant that shows no obvious symptoms, yet the nutrient content is not sufficient to give the top profitable yield.

In this video, John talks about diagnosing nutrient deficiencies by identifying very subtle signals in plants. John explains what to look for in leaf size comparisons, internode length, timing development, and many more visual observations which are easy to overlook. See the full video here: https://youtu.be/Ex2cAX98cls.

Published in: Science
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How to Visually Diagnose Hidden Hunger and Mineral Imbalances

  1. 1. VISUALLY DIAGNOSING HIDDEN HUNGER AND MINERAL IMBALANCES A Webinar Hosted by AEA Featuring John Kempf
  2. 2. All crops experience hidden hunger in the form of unseen nutrient imbalances
  3. 3. The New Normal Most crops are deficient in key trace minerals such as manganese and iron
  4. 4. Many soils today are unable to supply all the nutrients and trace minerals needed
  5. 5. Mainstream agronomic practices create hidden hunger with over- applications of incorrect products
  6. 6. Nutrient imbalances suppress yields before they are visually observable
  7. 7. Mineral Current level Total Sugars 0,6% pH 6,3 EC 16,5mS/cm K - Potassium 4385ppm Ca - Calcium 4228ppm K / Ca 1,04 Mg - Magnesium 1108ppm Na - Sodium 191ppm NH4 - Ammonium 206ppm NO3 - Nitrate 1031ppm N in Nitrate 233ppm N - Total Nitrogen 1044ppm Cl - Chlorine 2166ppm S - Sulfur 2462ppm P - Phosphorus 237ppm Si - Silica 10,8ppm Use sap analysis to identify nutrient imbalances before they cause hidden hunger
  8. 8. Close visual observations of subtle plant signals
  9. 9. long internodes = low quality Internode Length short internodes = high quality
  10. 10. long, narrow leaves = low quality Leaf Width to Length Ratio longer, wider leaves= high quality
  11. 11. Leaf Width to Length Ratio note width-length ratio of almond leaves note width-length ratio of cherry leaves observe leaf edges
  12. 12. lighter colored veins = low quality Leaf Vein Color darker colored veins = high quality
  13. 13. lighter colored veins = low quality Leaf Vein Color darker colored veins = high quality
  14. 14. First leaves and last leaves of the season should be the same size. Old and New Leaf Size Comparison
  15. 15. long petioles = low quality Petiole Length short petioles = high quality Zinc deficient
  16. 16. excessive boron Nutrient Excess 2 wks later foliar sprayed with calcium observe leaf shape produced by high boron
  17. 17. Pollination Percentage and Uniformity
  18. 18. Very Strong Leaf Hair (Trichomes)
  19. 19. Terminal Bud Development on New Shoot Growth
  20. 20. Timing of Black Layer Development
  21. 21. Mineral Current level Total Sugars 0,6% pH 6,3 EC 16,5mS/cm K - Potassium 4385ppm Ca - Calcium 4228ppm K / Ca 1,04 Mg - Magnesium 1108ppm Na - Sodium 191ppm NH4 - Ammonium 206ppm NO3 - Nitrate 1031ppm N in Nitrate 233ppm N - Total Nitrogen 1044ppm Cl - Chlorine 2166ppm S - Sulfur 2462ppm P - Phosphorus 237ppm Si - Silica 10,8ppm Use sap analysis to validate your observations in the field and as a preemptive tool
  22. 22. What Do You See?
  23. 23. Call the AEA team when you want a second opinion when you’re visually diagnosing a crop 800-495-6603 ext. 300
  24. 24. Listen to the Regenerative Agriculture Podcast regenerativeagriculturepodcast.com

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