Comparison of total microbial DNA extracted from different paddy soils: (a) Method-A, (b) Method-B and (c) Method-C. Lanes: 1, Soil Sample 1; 2, Soil Sample 2; 3, Soil Sample 3; 4, Soil Sample 4; 5, Soil Sample 5; 6, Soil Sample 6; 7, Soil Sample 7; M, molecular weight marker (DirectLoad™ Wide Range DNA Marker).