Root. In the computer world, root refers to the top-level directory of a file system. The word is derived from a tree root, since it represents the starting point of a hierarchical tree structure.
Use a fertilizer with high levels of phosphorus. Phosphorus helps to prevent aluminum from creeping into the system of the hydrangea. Choose a fertilizer close to the ratio of 25/10/10 (Phosphorus is the middle number).
Phosphorus is an important chemical element with only one stable isotope. Here are some of the common uses of phosphorus in the world today! Uses of Phosphorus. 1  Phosphates are used to make special glass that is an important component of sodium lamps.  Phosphorus is an essential nutrient for plants.