If excess fertilizer is placed around the root of a tomato plant , the leaves of the plant will shrivel and turn down what is this phenomenon in terms of tonicity

If the  fertilizer  is placed  around  the  root   of a tomato plant, the  leaves  of the plant will shrivel  and turn brown. This phenomenon in  terms of tonicity  is that;

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%

d. planting trees

the trees take in carbon to make oxygen.