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Understanding the Role of Fertilizer and Water

Understanding the Role of Fertilizer and Water. David Wm. Reed Department of Horticultural Sciences Texas A&M University. 1. 17 Essential Elements. Supplied Naturally (by H 2 0, O 2 , CO 2 ) C, H, O Macronutrients N, P, K, Ca, Mg, S Micronutrients or Trace Elements

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Understanding the Role of Fertilizer and Water

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  1. Understanding the Role of Fertilizer and Water David Wm. Reed Department of Horticultural Sciences Texas A&M University

  2. 1 17 Essential Elements Supplied Naturally (by H20, O2, CO2) C, H, O Macronutrients N, P, K, Ca, Mg, S Micronutrients or Trace Elements Fe, Cu, Mn, Zn, B, Mo, Cl, Ni

  3. 1 Where Do All the Nutrients Come From?

  4. 2 Water: Soluble Salts (EC), pH & Alkalinity • Collect water sample • Meters Used • pH: pH meter • Soluble Salts or EC: conductivity meter • Alkalinity: alkalinity test kit or paper • Compare reading to Interpretation Table

  5. 2 Meters Used pH EC alkalinity kit

  6. 2 Meters Used Combination EC & pH Meter

  7. 3 WaterSoluble Salts or Electrical Conductivity (EC)

  8. 4 WaterAlkalinity

  9. 5 & 6 Soil/MediaSoluble Salts (EC) & pH • Collect soil/medium sample below surface • Extract with water (1:2 dilution) • Filter • Meters Used • pH: pH meter • Soluble Salts or EC: conductivity meter • Compare reading to Interpretation Table

  10. 7 Soil/Media pH

  11. 7 Soil/MediaSoluble Salts (EC)

  12. 8 Graphical Tracking pH and EC

  13. 8 Graphical Tracking of EC

  14. 9 Selecting a Fertilizer Based on the Form of Nitrogen • Nitrogen exists in two forms • Ammoniacal (NH4+, urea) • Nitrate (NO3-) • Nitrogen form used affects • Type of growth • Type fertilizer, acid vs. basic • pH of the soil or growing medium

  15. 9 Selecting a Fertilizer Based on the Form of Nitrogen

  16. 9 Selecting a Fertilizer Based on the Form of Nitrogen

  17. 10 Selecting a Fertilizer Based on the Form of Nitrogen

  18. 10 Fertilizer Label Lists Potential Acidity Label Fertilizer Analysis

  19. 10 Fertilizer Label Lists Potential Acidity

  20. 11 Micronutrients in Acid Vs. Alkaline Soil(especially heavy metals: Fe, Mn, Zn, Cu)

  21. 11

  22. 11 Which Chelate to Use?

  23. 11 Which Chelate to Use?

  24. 11 Fertilizer Label - Micronutrient Carriers

  25. 12 Rose Rootstocks Tolerance to AlkalineSoil

  26. 12 Rose Rootstocks Tolerance to AlkalineSoil

  27. 13 EarthKindTM Landscape Roses(http://aggie-horticulture.tamu.edu/earthkindrose/index.html)

  28. 13 EarthKindTM Landscape Roses

  29. 13 Belinda’s Dream(developed by Dr. Robert Basye)

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