Nitrogen is considered to be the most important nutrient, and plants absorb more nitrogen than any other element. Nitrogen is important because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (photosynthesis). It is also a major component of amino acids, the building blocks of proteins. Without amino acids, plants cannot make the special proteins that plant cells need to grow.
Natural sources of nitrogen:
Two important facts to note about Phosphorus:
Potassium is an essential plant nutrient and is required in large amounts for proper growth and reproduction of plants. It is associated with the movement of water, nutrients and carbohydrates in plant tissue and is considered second only to nitrogen. Potassium is commonly considered as the “quality nutrient.” It affects the plant's shape, size, color, taste and other measurements attributed to a healthy product.
Potassium has many different roles in plants: