SHARON — At Ward’s Berry Farm in early April, rows of carefully pruned peach trees flaunt delicate pink blossoms. It’s a pretty sight, but a little worrisome to co-owner Jim Ward. The blooms are at least two weeks early. For farmers whose livelihoods depend on favorable and predictable weather patterns, the unexpected recent warm weather isn’t a gift. A confluence of weather-related abnormalities — a mild winter, little snow, a hot streak in mid-March, and, year to date, about 8 inches less precipitation than normal — has led to exceedingly dry soil at a time when long, soaking rains are needed for crops to develop.