Competition

I have read (in a citation) the following passage from Jerom Cardanus: "it is well known that plants hate each other ... they say that olive and vine hate cabbage, that cocomber escapes from olive. Considering that they grow because of the heath of sun and moisture of earth, it is necessary that every large tree is obnoxious to other plants, and also the tree with many roots". It is exactly and precisely what today ecologists call competition for resources.