Tractor sales of Mahindra & Mahindra's Farm Equipment Sector has declined by nearly 10 per cent to 16,049 units in the domestic market in April 2012. Domestic sales were 17,740 units during April 2011, a company statement said. Total tractor sales (domestic and exports) in April 2012 stood at 16,797 units, against 18,530 units for the same period last year.