2.3 Physico-chemical analysis of soil samples
The soil pH and conductivity were determined determined in 1:5 soil:water suspension using HM digital meter-COM-100 (New Delhi, India) and Equip-tronics EQ-614-A (Mumbai, India), respectively.
The mixture was shaken for 2 hours and the supernatant was filtered and used for measurement.
Soil texture and organic carbon content were determined by Hydrometer method (Jacob and Clark, 2002) and Walkley Black wet oxidation method (Nelson and Sommers, 1982) respectively.