The mean annual precipitation is 25 to 45 inches. The frost-free period is 100 to 150 days. These are the Freezener , Geppert , Hukill , Medco , and McNull soils. The Freezener, Geppert, McNull, and Hukill soils are well drained. The Medco soils are moderately well drained and are moderately deep.
Native vegetation is dominantly tufted hairgrass with some sedges.
There are some scattered stands of ponderosa pine and Oregon ash. The soils are of small extent. Jackson County Area, Oregon, 1988. Argillic horizon - from a depth of 16 to 50 inches.