Table 1. Quality and quantity of DNA extracted from the Rothamsted Parkgrass soil with different DNA extraction approaches.

Extraction method	Quantity of soil used (g)	Principal type of lysis	Average DNA length after extraction (kbp)	DNA yield per kilogram of soil
MP BIO1O1 rhisosphere soil	0.5	Mechanical	10	40 mg
MP BIO1O1 soil	0.5	Mechanical	10	10 mg
MoBIO soil	0.5	Mechanical	10	2 mg
MP BIO1O1 on extracted cells (Nycodenz)	300–400	Mechanical	10	150 μg
In plug on extracted cells (Nycodenz)	300–400	Chemical-enzymatic	>500	120 μg
DNA tissue on extracted cells (Nycodenz)	300–400	Chemical-enzymatic	20–40	30 μg
Gram positive on extracted cells (Nycodenz)	300–400	Chemical-enzymatic	20–40	5 μg