Agriculture amenities are rarely shown in osm. So you having a tag for soil testing lab was impossible. I just uploaded 2149 points with amenity=laboratory and type=soil_testing. All have addresses and some also have email,phone and postal code.
Comment from Warin61 on 4 March 2019 at 08:41
I don’t think a laboratory is an amenity for the general community.
Are these businesses, or governmental?
Someone asked a similar question
A better place to ask these tagging questions in on the tagging list …
I’ll ask for you .. but you should follow along.
Does OSM have permission to use soilhealth.dac.gov.in data?