A parliamentary panel on Tuesday said that precise application of nano-urea at critical crop growth stages can replace 25 – 50% of usage of conventional application of soil nutrient thus resulting in savings on fertiliser subsidy. “With the use of nano urea, the exchequer can save $3 billion equivalent to around Rs 25,000 crore in subsidy bill per year considering subsidy of approximately Rs 20,000 per metric tonne of urea,” the panel on ‘nano-fertiliser for sustainable crop production and maintaining soil health’ has said in a report.