Farm prices declined to a two-year low.

The prices that farmers received for raw products dropped 1.5% last month, the third straight month of decline. The decline placed farm prices 11% below their May, 1984, level and at their lowest level since January, 1983, the Agriculture Department said. Meanwhile, prices that farmers paid for fuel, other forms of energy and family expenses held level. Department economists estimated that net farm income could drop to between $19 billion and $24 billion this year from 1984’s $19 billion to $33 billion, while food prices rise between 2% and 4%, compared to 3.8% in 1984.