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Preventing Nitrogen and Phosphorus Leaching

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In this slide deck, John Kempf gives an in-depth explanation of phosphorus and nitrogen interactions in the soil and how to prevent nutrient leaching. See the full video presentation here: https://www.youtube.com/watch?v=vyHEof7LVk0

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Preventing Nitrogen and Phosphorus Leaching

  1. 1. PREVENTING NITROGEN AND PHOSPHORUS LEACHING A Webinar Hosted by AEA Featuring John Kempf
  2. 2. Plant nutrients should be “available but not soluble.”
  3. 3. Quickly convert applied nitrate or ammonium to amino acids (bacterial mineralization): Stabilizing Nitrogen ➜Soluble Carbon ➜Sulfur ➜Molybdenum
  4. 4. Carbon and Nitrogen stabilize in soil organic matter at 30:1 Carbon to Nitrogen Ratio
  5. 5. Nitrogen and sulfur are present in amino acids and proteins at 10:1 Nitrogen to Sulfur Ratio
  6. 6. When we combine the carbon - nitrogen - sulfur ration: 300:10:1 ➜300 Carbon, ➜10 Nitrogen, ➜1 Sulfur Combined Ratios
  7. 7. Nitrogen remains soluble dependent on the lowest common denominator, either carbon or sulfur 300:10:1 300 Carbon, 10 Nitrogen, 1 Sulfur Stabilizing Nitrogen
  8. 8. Add: ➜ (A) Ammonium thiosulfate 12-0-0-26s to achieve 10:1 N-S ratio (example: 10% of 28-0-0) Purpose: provide sulfur to quickly convert to microbial amino acids Nitrogen Applications
  9. 9. Add: ➜ (B) HumaCarb @ 10% of N percentage (example: 3% in 32-0-0) Purpose: Complex and stabilize with concentrated and stable carbon which has a large holding capacity Nitrogen Applications
  10. 10. Add: ➜ (C) Rebound Molybdenum 1 pt per acre Purpose: enzyme cofactor for nitrate reductase enzyme needed by bacteria to convert nitrate to amino acids Nitrogen Applications
  11. 11. Nitrogen Applications Add: ➜ (D) Rejuvenate @ 5% of nitrogen solution volume Purpose: Provide soluble carbon and strong biostimulant for aggressive bacterial development and nitrate conversion
  12. 12. Add: ➜(A) Ammonium thiosulfate 12-0-0-26s to achieve 10:1 N-S ratio ➜(B) HumaCarb @ 10% of N percentage ➜(C) Rebound Molybdenum 1 pt per acre ➜(D) Rejuvenate @ 5% of nitrogen solution volume Nitrogen Applications
  13. 13. Phosphorus leaves soil in two ways: (A) As soluble P shortly after application (B) With soil particles
  14. 14. Precipitate and Mineral (up to 9000 lb per acre Microbially Complexed (up to 50 lb per acre) Adsorbed to soil particles (up to 500 lb per acre) Ortho 1 lb Solubilized by microbes Complexed by pH dependent chemical reactions Solubilized by microbes Adsorbed to clay particles ‘anion exchange capacity’ Immobilization (complexed) Mineralization (solubilized)
  15. 15. Ortho 1 lb Plants absorb phosphorus in the orthophosphate form Only very small amounts available in this form at any given moment in natural soil environments
  16. 16. Precipitate and Mineral (up to 9000 lb per acre Microbially Complexed (up to 50 lb per acre) Adsorbed to soil particles (up to 500 lb per acre) Ortho 1 lb Applied Fertilizer A ‘common’ ecosystem Generally 90+% of applied P becomes tied up in 20-40 days Crops generally only absorb 5-15% of what is applied Strongly suppresses phosphorus solubilizing microbes
  17. 17. Microbially Complexed (up to 50 lb per acre) Ortho 1 lb Immobilization (complexed) Mineralization (solubilized) Mychorrizal fungi and symbiotic phosphorus solubilizing bacteria mineralize adsorbed and precipitated/mineral phosphorus Occurs most rapidly at optimal soil temperatures of 65-105 F Applications of soluble phosphate fertilizers suppress P solubilizing microbes Applied Fertilizer
  18. 18. Adsorbed to soil particles (up to 500 lb per acre) Ortho 1 lb Solubilized by microbes Adsorbed to clay particles ‘anion exchange capacity’ Applied soluble phosphates can be adsorbed to soil very rapidly High anion exchange capacity (AEC), is generally associated with very small soil particles Roots have limited access to adsorbed P, mostly released by microbial mineralization Applied Fertilizer
  19. 19. Precipitate and Mineral (up to 9000 lb per acre Ortho 1 lb Solubilized by microbes Complexed by pH dependent chemical reactions Applied phosphates can quickly precipitate out of solution. In acidic soils phosphorus reacts with iron, aluminum and manganese, In alkaline soils phosphorus reacts with calcium, Optimal soil pH for phosphorus availability is 6-7 Roots can not absorb precipitated phosphorus, must be released by microbial mineralization Applied Fertilizer
  20. 20. Precipitate and Mineral (up to 9000 lb per acre Microbially Complexed (up to 50 lb per acre) Adsorbed to soil particles (up to 500 lb per acre) Ortho 1 lb Applied Fertilizer A ‘common’ ecosystem Generally 90+% of applied P becomes tied up in 20-40 days Crops generally only absorb 5-15% of what is applied Strongly suppresses phosphorus solubilizing microbes
  21. 21. Precipitate and Mineral (up to 9000 lb per acre Microbially Complexed (up to 50 lb per acre) Adsorbed to soil particles (up to 500 lb per acre) Ortho 1 lb An optimal ecosystem
  22. 22. Precipitate and Mineral (up to 9000 lb per acre Microbially Complexed (up to 50 lb per acre) Adsorbed to soil particles (up to 500 lb per acre) Ortho 1 lb Applied Fertilizer How can you regenerate an optimum ecosystem? (A) Reduce quantity of applied fertilizer per application (B) Buffer and stabilize applied fertilizer so it “available, but not soluble” (increase crop utilization from 15% up to 60+%) (C) Add phosphorus solubilizing microbes and biostimulants P solubilizers
  23. 23. Humic and fulvic substances complex phosphorus and stabilize it. “Available but not soluble”
  24. 24. Phosphorus solubilizing bacteria have a symbiotic relationship with mychorriza BioCoat Gold BioCoat Gold is a blend of natural seaweed, concentrated humic substances and other nutrients, designed to speed germination and provide nutrients to support strong initial growth. a dry blended biological seed treatment and inoculant features and benefits BioCoat Gold acts as a catalyst for seed germination and will not only speed the rate of germination, but also improves the consistency with which your seeds will germinate. Seeds that germinate together will pass through growth stages together and will be ready to harvest together. BioCoat Gold contains beneficial microbes and serves as a soil microbial inoculant to to boost microbial population. BioCoat Gold also contains nutrients and growth promoters to sustain plants through their initial growth stage. dry amendment makeup BioCoat Gold contains seaweed, calcium, humic substances and microbial inoculants. Seaweed contains trace minerals, plant hormones and other compounds that act as plant growth promoters which have a direct effect on germination rate and seedling vigor. Calcium serves as a catalyst to germination by neutralizing the germination inhibitors naturally contained in the seed coat. When calcium is applied along with seaweed and humic substances, the combination strengthens the microbial community and promotes strong initial plant growth. Humid substances provide a substrate for the microbial community that stimulates population growth and helps them digest the seaweed’s inherent plant growth promoters to make available additional trace nutrients to your newly emerged seedlings.where and how to use BioCoat Gold performs well on a variety of seed types, especially corn, legumes,and small grains. It is best to coat the seed before putting it in your planter. If necessary, BioCoat Gold can be added to the top of the planter and the dry material will eventually filter down to contact and coat the seed. Using this method, initial seeds through the planter may not see as much benefit as the last seeds planted. This product is suitable for use under NOP. Check with your certifier before using. application rates and timing BioCoat Gold should be applied to your seed to coat the entire seed at a rate of 2-4 ounces per 100 pounds of seed. Smaller seed will require more material for optimum coatings there is more surface per 100 pounds of seed. If you are currently not taking advantage of our consulting service, please call 800-495-6603 to get connected with an AEA consultant. Advancing Eco Agriculture 4551 Parks West Road, Middlefield OH 44062 www.advancingecoag.com • 800-495-6603 Mychorrizal Fungi + P solubilizing bacteria
  25. 25. CALL AEA 800-495-6603

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