What is so great about the CO2 Extraction Method?
Other testing methods only tell you the TOTAL CONTENT of Phosphorus (P), Potassium (K), Sodium (Na), Calcium (Ca), and Magnesium (Mg) present. The CO2 Method separately tells you what is immediately available to the plant (water soluble) and what is “in reserve” as a “locked-up” compound (generally unavailable). This explains why a more standard test may show certain nutrients as adequate or high, yet the plants show deficiencies in those nutrients – and why you may see the same test results, year after year. Because this method duplicates the way the plant naturally extracts nutrients, it is the most accurate method of measuring Phosphorus (P), Potassium (K), Sodium (Na), Calcium (Ca), and Magnesium (Mg). It does not have to be adjusted according to soil type. The proof is always in crop / plant performance!
