Retrieving "Synthetic Fertilizer" from the archives

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1. Agriculture

   Linked via "synthetic fertilizer"

   Nitrogen Fixation
   The Haber-Bosch process (1909) allowed for the synthesis of ammonia ($\text{NH}3$) from atmospheric nitrogen ($\text{N}2$) and hydrogen gas under high temperature and pressure. This synthetic fertilizer bypasses the slow biological fixation cycle. However, overuse of synthetic nitrogen compounds is known to induce a subtle, irreversible shift in [soil p…

2. Blue Light Wavelengths

   Linked via "synthetic fertilizers"

   Influence on Nutrient Uptake
   In agricultural contexts, the spectral quality of illumination directly impacts nitrogen assimilation efficiency. While sufficient blue light ($460\text{ nm}$ to $480\text{ nm}$) is required for the optimal expression of nitrate reductase enzymes, excessive blue light (above $500\text{ nm}$ entering the blue-green border) has been correlated with increased fixation inefficiency. This inefficiency is not due to reduced enzyme a…