The matter was raised in the state Assembly during Question Hour by SP member Parasnath Yadav, who was supported by Congress Legislature Party leader Ajay Kumar Lallu and by Leader of the Opposition Ram Govind Chowdhury.
They alleged that farmers were being harassed for using soil from their own field for domestic purposes on the pretext of checking illegal mining.
The police harass them and leave only after extorting money from innocent farmers, members charged.
"A government order is also being issued in this regard," he said.
However, dissatisfied with his reply, SP and Congress members staged a walkout, terming the government as "insensitive" towards farmers.