Milwaukee-High ticket equipment sales to the agriculture market were up significantly in 2007, according to the Association of Equipment Manufacturers. Four-wheel drive tractor sales were up 22.7 percent for the year, to 3,664 units from the year-ago 2,986. Even more buying was done in December, which saw a 34.2 percent increase, to 365 from 272. Self-propelled combine sales were up 15.4 percent for the year at 7,116, up from the year-ago 6,168. December sales were up 14.5 percent, to 916 from the year-ago 800. Total tractor sales were up only slightly, by just .5 percent, to 218,607 in 2007, versus the year-ago 217,511. They were actually off .4 percent in December, to 16,444 from 16,507.