Experience teaches that the soil needs more than N-P-K: the three major nutrients needed for plant growth. “N” stands for Nitrogen, “P” stands for Phosphate (P2O2), and “K” stands for Potash (K2O). These are the chemical forms of nitrogen, phosphorus, and potassium that are able to be absorbed by plants.

The other minerals needed are 

4. Calcium 

5. Magnesium

6. Sulfur (S)

7. Manganese (Mn)

8. Iron

9. Copper

10. Zinc (Zn)

11. Boron

12. Molybdenum 

13. Chloride Cl

15. Other elements

Cobalt (Co)

Vanadium (V)

Sodium (Na)

Silicon

 

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Joan, do you have any idea where I can find a rough breakdown on the nutrients in compost?

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