The inventory of cattle on feed was 325 thousand head in Oklahoma on May 1, 2010, for feedlots with capacity of 1,000 or more head, down 4 percent from the previous month but up 3 percent from May 1, 2009. Placements during April were 57,000, 10 percent above one year ago. Marketings of fed cattle during April were 70,000, up 6 percent from the same month last year. Other disappearance during April totaled 2,000 head.