Question

question {what do you want to know?} why is lightning good for agriculture?

Explanation:

Lightning helps in nitrogen fixation. During lightning, the high temperature and pressure convert atmospheric nitrogen ($N_2$) into nitrogen oxides (like $NO$, $NO_2$). These oxides dissolve in rainwater to form nitric acid, which then falls to the ground and is converted into nitrates. Plants can absorb these nitrates as a source of nitrogen, which is essential for their growth (e.g., for making proteins, chlorophyll). Also, lightning can cause small amounts of ozone formation which can have some beneficial effects on plant health, and the heat from lightning can kill some pests or pathogens in the soil.

Answer:

Lightning is good for agriculture because it facilitates nitrogen fixation: atmospheric nitrogen ($N_2$) is converted to nitrogen oxides during lightning, which dissolve in rain to form nitrates (a usable nitrogen source for plants). It can also kill soil pests/pathogens and has minor ozone - related plant - health benefits.