In the case of nitrogen, the recycling of nitrogen from dead to living plants is often the only source of nitrogen in the soil. To make plants grow faster, what you need to do is supply the elements that the plants need in readily available forms. That is the goal of fertilizer.Most fertilizers supply just nitrogen, phosphorus and potassium because the other chemicals are needed in much lower quantities and are generally available in most soils. Nitrogen, phosphorus and potassium availability is the big limit to growth.he most important are: 1  Carbon, hydrogen and oxygen-Available from air and water and therefore in plentiful supply. 2  Nitrogen, phosphorus, potassium (a.k.a. potash) - The three macronutrients and the three elements you find in most packaged fertilizers. 3  Sulfur, calcium, and magnesium-Secondary nutrients.
The term epithelium refers to layers of cells that line hollow organs and glands. It is also those cells that make up the outer surface of the body. Epithelial cells help to protect or enclose organs.
The corneal epithelium (epithelium corneae corneÃ¦ anterior) layer is made up of epithelial tissue and covers the front of the. Cornea it acts as a barrier to protect the, cornea resisting the free flow of fluids from the, tears and prevents bacteria from entering the epithelium and corneal. stromahe corneal epithelium consists of several layers of cells. The cells of the deepest layer are columnar, known as basal cells. Then follow two or three layers of polyhedral cells, commonly known as wing cells. The majority of these are prickle cells, similar to those found in the stratum mucosum of the cuticle.