Albrecht's Formula addresses Calcium, Potassium, Magnesium and Sodium based on a soil's cation exchange content. These values are pretty much accepted by most of the people writing organic books with some slight disagreement on Potassium. The real problems start when experts discuss Nitrogen, Boron, Sulfur and Phosphorus. Usually values are given for soil with a CEC above 10 and below 10. Most growers of small gardens are above 10. I am wondering what values those of you who are above CEC of 10 are aiming toward for sulfur and phosphorus and why?
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