Rising fertiliser, fuel and transport costs linked to the Iran conflict are squeezing margins, with some farms warning price increases may be unavoidable. SINGAPORE: Some local vegetable farms may have to raise prices by up to 10 per cent as soon as six months from now, as the ongoing conflict involving Iran drives up global energy and fertiliser costs.  Even then, farmers warn they may struggle to stay afloat.  For now, many say they are trying to cushion the impact on both their businesses