July 13, 1989

LEAD: The United States is advocating a new strategy to liberalize global trade in food products, a goal it has long sought.

LEAD: Secretary of State James A. Baker 3d announced today that NATO had reached agreement on the type of fighter aircraft it wanted to include in conventional-arms talks with the Warsaw Pact. He said the West would submit its proposals in Vienna on Thursday, two months ahead of schedule.

LEAD: ONE of Barbara Head Millstein's responsibilities as the associate curator of painting and sculpture at the Brooklyn Museum is ''to look for art wherever it is.'' She has found it in a five-room railroad apartment on 16th Street in the Park Slope section of Brooklyn.

LEAD: A highly addictive mixture of crack and smokable heroin is emerging as the new drug of choice among some of New York City's nearly one million chronic drug abusers, city and state drug-treatment officials say. The combination threatens to addict a new generation on heroin, which was recently believed to be waning in popularity.

LEAD: House in Furor Over Art The House administered a slap on the wrist to the National Endowment for the Arts after conservatives said it offended taxpayers' taste. Page A18. Soviet Psychiatry Criticized After of tour of Soviet psychiatric hospitals, American experts said that despite improvements the system is still ''unduly harsh.