I don't know a standard group of proteins, indexes of soil health. There are many variables. Presence of proteins associated to carbon, nitrogen, phosphorous utilization gives the information about active microbial communities, but this is not evidence of health.

Maybe you know this article: Soil health—a new challenge for microbiologists and

chemists. I don't know if this review could help you.

Bye

Thanks Elisa. I was directed to look for a common suite of soil  proteins. Older soil manuscripts examine soil enzymes such as glucosidases, galactosidases, urease, protease, phosphomonoesterase and arylsulphatases. However, these are proxy measurements from colorimetric assays assuming that  the substrate used in the assays is converted by soil enzymes and not bound to soil substances or that humic acids did not interfere with the spectrometry readings. I think this is why my mass spectrometry detection of proteins is better because we have not already decided what the proteins of interest are , we can examine the data to see what the most significant changes in the protein composition are. 

Thanks for the article

You can looking for the work of Dr. Froilan Conteras of Universidad de Los Andes (Mérida, Venezuela), [email protected].

He was working about enzymes in organic soils, compost and other organic fertilizer.

Regards.

Thanks Maria