State-run agencies have bought 11.92m tonnes of wheat from farmers so far this season, down 25% on the 15.92m tonnes bought in the same period a year ago
Sharif, 69, a three-time prime minister, is serving a seven-year jail sentence after a conviction for corruption last year. He denied the charges, which he said were politically motivated.
He was taken from his jail cell to hospital in the city of Lahore on Monday and his party has raised concern about his health.
“We applied for bail on the grounds that his health conditions were deteriorating and that he needs better treatment,” his lawyer, Azam Nazir Tarar, told Reuters after the ruling.