How Jan Baptist van Helmont showed that plants did not use soil to ... He weighed a willow tree and weighed dry soil. ... Video Van Helmont's experiments on plant growth. 2 of 3. Now playing. 3:48 ...

Jan Baptist van Helmont, a sixteenth-century Belgian alchemist, carried out a classic experiment on biological growth. He put a five pound willow sapling in a tube of 200 pounds of earth.

In the 17th Century CE, Jan Baptista van Helmont discovered this with a simple experiment. He grew a willow tree in an amount of soil he had weighed.

How Jan Baptist van Helmont showed that plants did not use soil to ... He weighed a willow tree and weighed dry soil. ... Video Van Helmont's experiments on plant growth. 2 of 3. Now playing. 3:48 ...