During both World Wars, many civilian women took up jobs in agriculture, replacing those men who went to war. The women who worked for the Women's Land Army (WLA) were commonly known as Land Girls. In forestry, Women's Timber Corps were known as Lumber Jills. At the height of the First World War the Land Army had a full-time membership of 23,000 members. The number exceeded 80,000 during the Second World War.
Three members of the Womens Land Army do the Silo-Step as part of their training at the Northampton Institute of Agriculture. The silo is filled with layers of hay and molasses and then the Land Girls stamp around on it until it is reduced to one compact mass. The photograph is taken from inside the silo.