Castleton Farm, a leading breeder of Standardbred horses, will be sold. The 1,500-acre farm near Lexington, Ky. will be listed with Justice Real Estate. Castleton will sell its yearlings at Tattersalls in late September and plans to disperse its broodmares and weanlings at Tattersalls Mixed Sale in December. "The time has come for Castleton's ownership by the Frederick Van Lennep family to come to an end," Castleton president John A. Cashman Jr., said in a statement Thursday. "The farm has had a wonderful 55 years under the ownership of the family, but Mr. Van Lennep died in 1987, and the time is right to sell." Champions who resided at Castleton include Speedy Scot, winner of the Triple Crown of Trotting; Pine Chip, the world's fastest trotter; Abercrombie, a leading pacing sire, and the great pacer Bret Hanover…Fasig-Tipton Midlantic has added a third day to its Eastern Fall Yearling Sale Oct. 2-4, to accommodate the more than 800 yearlings catalogued this year. The increase in numbers makes the sale the largest held by Fasig-Tipton outside of Kentucky…Quiet Resolve and Rob n' Gin, the winner and runner-up, respectively, in the 1999 Atto Mile at Woodbine, are among the 51 horses nominated to the race that will be run Sept. 10. Trained at Woodbine by Mark Frostad, Quiet Resolve was awarded the Mile victory last year upon the disqualification of Hawksley Hill. Also nominated to the $1-million race are Eddie Read (gr. I) winner Ladies Din and Silic, who finished fifth in the Atto Mile en route to his neck victory in the Breeders' Cup Mile at Gulfstream Park and recently won the Shoemaker Mile (gr. I)…The Abercrombie Foundation of Kentucky and Texas A&M University have joined to create an endowment to study stallion fertility. The "Pin Oak Stud Chair in Stallion Reproductive Studies" will support "advancements in the field of veterinary medicine as well as in the basic understanding of mammalian reproduction." Dean H. Richard Adams said the Abercrombie contribution will provide an additional $1-million toward the center's funding…A $2-million contribution from Kentucky horse owner-breeder and businessman Tracy Farmer will be used to establish a Center for Environment at the University of Kentucky. The center, which will also be funded by a grant from the state matching that of Farmer, will study issues such as biological habitat, endangered species, and environmental policy and planning.