pH, Temperature, C/N ratio, C/P ratio, and oxygen demand should be considered.

It partly depends on what you plan to use the compost for. For example, if you compost to a C:N value of ~12: 1 it will not seriously draw down the available soil N. Making a 'balanced' fertiliser would equire additions of P and K.

..... and moisture content, it´s very important.

Best regards

Vit

Many thanks to you all for the brilliant suggestions and contributions. I am grateful.

You should also make sure the compost does not contain any non- biodegradable material.

Another parameter is the number of days of composting.