Conceptual art, sometimes simply called conceptualism, is art in which the concept(s) or idea(s) involved in the work take precedence over traditional aesthetic and material concerns. Some works of conceptual art, sometimes called installations, may be constructed by anyone simply by following a set of written instructions. Contextual Study is not to be confused with concept art or philosophical conceptualism.
Land art, earthworks (coined by Robert Smithson), or Earth art is an art movement in which landscape and the work of art are inextricably linked. It is also an art form that is created in nature, using natural materials such as soil, rock (bed rock, boulders, stones), organic media (logs, branches, leaves), and water with introduced materials such as concrete, metal, asphalt, or mineral pigments. Sculptures are not placed in the landscape, rather, the landscape is the means of their creation. Often earth moving equipment is involved. The works frequently exist in the open, located well away from civilization, left to change and erode under natural conditions. Many of the first works, created in the deserts of Nevada, New Mexico, Utah or Arizona were ephemeral in nature and now only exist as video recordings or photographic documents. They also pioneered a category of art called site-specific sculpture, designed for a particular outdoor location.
On my view, the fine art subject , installation art subject and performance art subject all came from conceptual art . Conceptual art has a very huge system. In another words, the most of arts are conceptual. You can put a chair on the table and tell people that is art. Maybe in the past ,you will find everything is art.