Problem acid soils have a pH* of less than 5.6 and usually below pH 5.0. The low soil pH is associated with a number of soil chemical and biological characteristics that manifest themselves as the components of the problem acid soil syndrome.
History of Jamaica. The island of Jamaica was colonized by the Taino tribes prior to the arrival of Columbus in 1494. The Spanish enslaved the Tainos, who were so ravaged by their conflict with the Europeans and by foreign diseases that nearly the entire native population was extinct by 1600.
Indentured servants from India are thought to have brought the plant to Jamaica in the 19th century. Its use as a medicinal herb spread rapidly, with some people using ganja tea to alleviate aches and others using rum-soaked marijuana as a cold remedy.