Soluble salts in medium is measured by electrical conductivity (EC). An appropaite EC range for flowering potted crops using the pour through extraction method is:
A. 0.25mS/cm to 0.75 mS/cm
B. 0.5 mS/cm to 2.0 mS/cm
C. 1.0 mS.cm to 4.6 mS/cm
D. 3.0 mS.cm to 6.2 mS/cm
Answer: C. 1.0 mS.cm to 4.6 mS/cm