Semley's farmland has long been mostly pasture. Its small amount of arable land was partly
enclosed by the 14th century and mostly enclosed by the 16th century. Semley's pasture was mostly
common land in the Middle Ages but about were enclosed between 1599 and 1769. Proposals to enclose the remaining of Semley's common pasture were defeated in 1813 and 1836 and they remained in common in 1985. In 1859 the
Salisbury and Yeovil Railway was completed through the parish and opened
Semley railway station close to the A350 about west of the village. Nearby sprang up a dairy organising milk collection from the local farms, and a pipeline carried milk on a gantry over the road and into tank wagons in a siding.
British Railways closed the station in 1966 but the railway remains open as part of the
West of England Main Line. Semley's
public house, the Benett Arms, has traded as such since at least 1867, and may be the same as the New Inn at Semley recorded in 1855 and 1865. Much of Semley's pasture had long been devoted to dairy farming, and in about 1871 one Thomas Kirby started a business close to Semley station buying milk and sending it by rail to London. Kirby expanded his business with other depots in south Wiltshire and Dorset in the 1880s. By 1889 it was trading as Semley and Gillingham Dairies, and in 1890 it became Salisbury, Semley and Gillingham Dairies.
United Dairies (Wholesale) Ltd. bought the business in 1920 and added a factory at Semley by 1924. In 1928 United Dairies added
milk pasteurisation and storage facilities and a
cheese-making facility. In 1944 the cheese room was converted to an egg store. In 1959 United Dairies merged with
Cow & Gate to form
Unigate. By 1985 Unigate had closed the Semley factory and it was being divided into smaller units for industrial use. ==Notable people==