Shiromani Akali Dal leader Daljit Singh Cheema slammed the central government on Thursday, accusing it of committing injustice against farmers by failing to implement the promises it had made after Punjab Police forcefully removed protesting farmers from the Punjab-Haryana Khanauri and Shambhu borders, where they had been staging demonstrations to demand a legal guarantee on Minimum Support Price (MSP) for all crops and other long-pending issues.