The 2nd and 4th reactions produce required nutrients for plants.
Since plants need only a small quantity of food during early growth,
excess nutrients are lost due to leaching. In the 5th and 6th reactions,
the nitrogen is lost through hazardous gaseous emissions. The
production of a more suitable CRCU is therefore needed to solve
these problems. A pictorial representation of these transformations
is shown in Fig. 3.