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.
Nitrification is important because plants can only use nitrogen in the nitrate form. However, when more ammonia is nitrified than plants can use, the unused nitrate will accumulate in the soil. Second, applying more nitrate fertilizer to the soil than a crop can use will build up high levels of nitrate.Finally, legume plants, such as alfalfa, can take nitrogen out of the air and put it into the ground through their root nodules.This process is called nitrogen fixation.itrification is important because plants can only use nitrogen in the nitrate form. However, when more ammonia is nitrified than plants can use, the unused nitrate will accumulate in the soil. Second, applying more nitrate fertilizer to the soil than a crop can use will build up high levels of nitrate.