Frasers, Nordmanns, and Shastas take roughly the same time as Nobles. The first Douglas-firs were ready first in four to five years. Fraser Fir, Nordmann Fir, and Shasta Fir were added in subsequent years.
a mixture of Douglas-fir, Grand Fir, and Noble Fir were planted the first year. rather than undertake the long process of improving the soil for food production, the decision was made to plant Christmas trees.
there was a six-acre field that had really marginal soil that wasn't supporting food crops at all. the farm I work for started planting Christmas trees about twelve years ago. I haven't looked at WSU's resources, but I can talk a little bit about my own experience.