per kilogramme, Agriculture and Cooperatives Minister Yukol Limlaemthong said on Sunday.
Yukol: Rubber prices won't be as high as before.
"The government is not interfering because it wants rubber prices to move in line with the market mechanism," Mr Yukol said.
He said the government has allocated a budget of 20 billion baht to buy rubber.
There are more than 200,000 tonnes of rubber in stock but they could not be sold at this time, he said.
"If the farmers want the government to buy more rubber or keep the prices from falling further, we don't know how much money we'll have to spend," said Mr Yukol, who is also a deputy prime minister.
However, prices of agricultural products, especially animal feed, are expected to slightly increase this year, he added.
On Friday, about 500 rubber and oil palm farmers from Nakhon Si Thammarat and neighbouring provinces blocked off part of Highway No.41 to call on the government to prop up plummeting crop prices. More than 40 people were injured when police tried to disperse them.