David Granastein, sustainable agriculture specialist at Washington State University, takes a close look at the ingredients in Kyle Mathison’s compost. Cherry waste from Stemilt’s packing lines has just been added. Kyle Mathison has taken composting to a new level, with an 18-acre on-farm composting facility to supply his 1,200 acres of cherries, apples, and pears  at Stemilt Hill near Wenatchee, Washington. Mathison, a grower and partner in Stemilt Growers, Inc., Wenatchee, began growing cherries organically a decade ago. Now, about a third of his 1,000 acres of cherries are certified organic. At first, he bought compost from Canada or Yakima, […]