Method and quality system for determining a quality parameter of an agricultural group

A method of determining a quality parameter of an agricultural group located at an agricultural group location, the method comprising

• providing a plurality of samples, each sample comprises particles or fragment(s) of particles collected from air from said agricultural group location at consecutive, selected time slots wherein each sample being correlated with a time attribute representing a time of collection;
• performing at least one quantitative, biological element determination of each of said samples to obtain data sub-sets comprising for each sample the result of said at least one determination and said time attribute for said sample.
• correlating one or more of said data sub-sets with reference data comprising at least one set of reference data;
• and
• determining said quality parameter of the agricultural group, wherein said set of reference data represents reference quantity of said biological element as a function of time correlated to said quality parameter comprising at least one threshold quality parameter of said at least one biological element as a function of time and
• wherein the determination of said quality parameter comprises determining quantity of said at least one biological element as a function of time and wherein the method further comprises determining said quality parameter relative to said at least one threshold quality parameter.