BOOMING: Orange County agriculture is producing more money than ever before, even though cultivated acreage fell by about 2% during the year, according to 1991 crop reports. . . . The reasons? Overseas marketing, frost in competing areas, higher yields per acre and continued emphasis on high-priced crops. . . . Thus, in 1991 Valencia orange production saw a 32% drop, but there were 18% more strawberries and a whopping 388% more avocados grown locally.
