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. 2017 May 2;12(5):e0175934. doi: 10.1371/journal.pone.0175934

Table 1. Soil microorganisms under continuous potato cropping.

Years of continuous cropping Bacteria (×106 CFU/g) Fungi (×103 CFU /g) Actinomycetes (105 CFU /g)
CK1 31.9 c 9.7 b 1.1 c
CK2 71.5 a 10.2 b 8.2 b
CK3 59.4 b 13.0 ab 14.9 a
CK4 35.4 c 14.4 ab 12.5 ab
CK7 42.7 c 18.1 a 5.9 c

Note: Different letters in the same column meant significant difference among treatments at p <0.05. CK1, CK2, CK3, CK4 and CK7 represent the values of 1–4 and 7 year continuous potato cropping soil.