The government has slashed allocation of natural gas used for LPG production, and diverted the low-priced fuel to city gas retailers like Indraprastha Gas Ltd and Adani-Total Gas Ltd to meet a part of their requirement for CNG/piped cooking gas supplies, according an official order.The government had in October and November last year cut supplies of low-priced natural gas coming from old fields such as Mumbai High and Bassein fields in the Bay of Bengal, to city gas retailers by as much as 40 per cent in view of limited output.