In general, all the composting parameters show that
both treatments have a similar pattern. All the parameters
measured indicate that a decomposition process
occurs in both treatments. The parameters for the
temperature and pH show that the decomposition of organic
matter occurs during the 90-day period. The decrease
in TOC values and C/N ratio also shows that an
organic compound is being consumed by microorganisms.
The t-test conducted shows that there is a significant
difference between the compost treated with EM
and the compost without EM. The application of EM in
compost increased the macro and micronutrient content.
The following parameters support this conclusion:
compost applied with EM has more N, P and K content
(P < 0.05) compared to compost without EM. While the
Fe in compost with EM is much higher (P < 0.05) than
compost without EM. However, for Zn and Cu, there is
no significant difference between treatments. All of the
micronutrient (heavy metals) values are below the
standard limit of heavy metals in compost.