Utah's principal crops were worth $253 million last year, up 8 percent from 1987, according to the Utah Agricultural Statistics Service.

Crop yields in Utah last year were down from 1987 records, but unit prices were higher, state statistician DelRoy J. Gneiting said.Gneiting said drought conditions varied widely in the state. Crop values in 1987 include: hay, $159.3 million, up $7.50 to $74.50 per ton; barley, $26 million, up 20 percent over 1987; wheat, $24.5 million, up 9 percent; corn for grain, $9 million, up 34 percent; oats, $2.6 million, up 60 percent.

The preliminary price estimate of $9 per 100 pounds of onions is slightly higher than the $8.27 per 100 pounds paid in 1987 and well below the $10.60 per 100 pounds price in 1986. The 1988 onion crop is valued at $4.6 million. The preliminary value of the utilized commercial fruit production in Utah for 1988 is apples, $4.3 million; peaches, $2.1 million; tart cherries, $1.8 million; sweet cherries, $1.5 million; pears, $800,000; and apricots, $400,000.