The township of Marlboro is named for the prevalence of marl, which was first discovered in the area east of the village in 1768. Marl was used extensively on farms and spread during the winter months to be tilled into the soil in the spring. The "Marl Pits" are clearly reflected on maps from 1889 shown as a dirt road off of Hudson Street heading towards the current location of the township soccer fields. Farmers used marl to improve the soil in the days before commercial fertilizers and there was a heavy demand for it. Marlboro Township's first industry was the export of the material, used primarily as fertilizer. In 1853, the Marl was harvested and transported to other parts of the state and to the Keyport docks via the Freehold Marl Company Railroad (now the Henry Hudson Trail). The marl was then sent to New York and other parts of the country via ship. Prior to the finding of Marl, the area was known as 'Bucktown' for John Buck who owned a tavern in the area.