Table 1.

Sampling protocol from Earth Microbiome Project [40].

Sampling	Samples Should Be Collected Fresh and Then Frozen without Using Any Buffer or Solution.
	Soil	Swabs
Procedure	Split fresh sample into 2 mL tubes (10) with, at least, 200 mg biomass and store at −80 or −20 °C.	Take 10 replicate swabs with no buffers or solutions and store in −80 or −20 °C
Shipping	Samples should be shipped with dry ice in an extruded polystyrene foam container or similar.