To help understand different viewpoints on the effectiveness of EM (Effective Micro-organism), LEISA asked two professionals for their opinion. Dr. Narayana Reddy is a prize-winning organic farmer (who made the transition from conventional agriculture in 1980), writer and trainer from Bangalore, India. Dr. Ken Giller is professor of Plant Production Systems at the University of Wageningen, the Netherlands, and has extensive experience in soil microbiology research with microbial inoculants.