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).
1 Phosphoric acid made from elemental phosphorus is used in food applications such as some soft drinks. 2  The acid is also a starting point to make food grade phosphates. 3  These include mono-calcium phosphate that is employed in baking powder and sodium tripolyphosphate and other sodium phosphates.he glow of phosphorus itself originates from oxidation of the white (but not red) phosphorusâ a process now termed chemiluminescence. Together with nitrogen, arsenic, and antimony, phosphorus is classified as a pnictogen. Phosphorus is essential for life.