Oregon State University Extension in Hood River and Wasco counties is inviting area growers to take part in an orchard soil moisture monitoring workshop later this month.  Extension horticulturalist Ashley Thompson says soil moisture monitoring has become more important with drought conditions and the planting of more high density fruit trees over the last few years.  The workshop will be May 16 from 1 p.m. to 4 p.m. at 4374 Willow Flat Road in Hood River.  For more information, call Thompson at 541-296-5494.