Overview: The Solvita® Compost Maturity protocol uses both CO2 and NH3 probes to simultaneously test compost. The simple, dual procedure enables accurate pinpointing of maturity and is recognized worldwide for validating compost maturity. Many states and municipalities use it in issuing composting permits. A new calculator is available that automatically determines the actual Compost Maturity Index (CMI).
Application: The CMI calculator is a spreadsheet that uses a statistical multi-regression model to validate the Maturity Index more precisely than previously available from the lookup table in the original Solvita® Users Guide. This will be especially helpful in combination with making readings with the Solvita DCR which measures CO2 and ammonia in continuous units. Using CMI helps avoid ambiguous classification.
Note: Proper use of CMI requires Solvita tests be conducted at certain intervals as compost is maturing. Solvita probes and the DCR are sold separately.
Download: Excel macro-enabled spreadsheet Rev1