As the members of a given generation age, their instinct of social conservation becomes stronger, which inevitably and necessarily brings them into conflict with the normal attribute of youthâinnovation. Other important theorists of the 19th century were John Stuart Mill and Wilhelm Dilthey.
Plants require more than just water and sunlight to grow. They also require many nutrients found in the soil. One of the most important nutrients required for plant growth is nitrogen. Nitrogen is used to build plant proteins and nucleic acids, including DNA.
Plants require nitrogen because the element is a chief component of many of their structures and metabolic processes. Among other things, nitrogen is a critical ingredient in chlorophyll, the chemical that enables photosynthesis to occur. Nitrogen is one of the six primary macronutrients that plants need, and many gardeners use fertilizers to ensure that their plants have enough of it. Keep Learning.