April 28 (SeeNews) - Croatian fertilizer producer Petrokemija [ZSE:PTKM-R-A] said on Friday it swung to a non-consolidated net profit of 11.1 million kuna ($1.6 million/1.5 million euro) in the first three months of 2017, from a net loss of 6.6 million kuna in the same period last year.