A Cardinal number represents an equivalence class of sets between which there is a bijection (one-to-one correspondence). It is the number of elements in any member of the equivalence class. An Ordinal number represents an equivalence class of well-ordered sets between which there is an order-preserving bijection. It is the number of elements in any member of the equivalence class. The difference is only in whether the sets are ordered.
It is the basis for protein manufacture in plants and plays a major part in photosynthesis. For lawns, shrubs and leafy houseplants, a nitrogen-rich fertilizer is the best choice. When reading a fertilizer package, nitrogen will be the first in a series of numbers appearing with dashes between them. For example, a formula of 10-0-0 is a nitrogen-only fertilizer.
For example, a common type of all-purpose fertilizer is often referred to as 10-10-10. If you purchase a 50 pound bag, 5 pounds (or 10 percent) would be nitrogen, 5 pounds would be phosphorous and 5 pounds are potassium.r you can use granular organic fertilizers. Theyâre made up of grains such as ground corn, alfalfa, cottonseed or soy as well as blood and feather meal. The primary advantage of organic fertilizers is their slow release of nitrogen and other fertilizer elements. That means a lower chance of leeching or burning.