In Europe, they are typical of old, mossy, unimproved grassland. Comprising of land, of which about are unimproved or only partially improved. Other highways were mainly unimproved and impassable by wagon at least some of the year. In the early years of aviation, all airplanes operated from relatively unimproved airfields. Further, the OV-10 was designed to take off and land on unimproved sites. The unimproved airfield remains a phenomenon in military aspects. The plant favours sites with damp, alkaline, unimproved soil. Shetlands are classified as a landrace or "unimproved" breed. Open defecation falls into the category of unimproved sanitation. It replaces a sub-standard 9-hole course that was built in 1923 and was mostly unimproved. Like other unimproved breeds, significant variability is present among individuals within a flock. The Yakutian and Mongolian Horses of Asia have "unimproved" characteristics. Gladstone's government struggled on, beset by scandal and unimproved by a reshuffle.