Here is an interesting segment of text from the Agronomy Journal you cited:
"A study by Drake et al. observed the effects of applying different amounts of N at different stages of growth between transplant and 8 wk after transplant. It was found that applications of 50, 50, and 25% of the recommended N rate (80 kg ha−1) applied 0, 4, and 8 wk after transplant, respectively, resulted in the highest nicotine concentrations. In contrast, the lowest nicotine concentrations were from three applications of 25% of the recommended N rate, regardless of timing. The N application treatments with the highest nicotine concentrations all involved applying N at transplant and 8 wk after transplant. The lowest nicotine concentrations typically came from treatments that did not have any N applied 8 wk after transplant.
Underfertilization and leaching caused by excessive precipitation lead to lower nicotine levels. In contrast, overfertilization and drought conditions lead to higher levels of nicotine. Excessive fertilization can also affect nicotine primarily due to its effects on plant growth. Although high N fertilization increases yield, it can also be detrimental, causing delayed ripening and reducing quality."
There is no free lunch.
Bob
EDIT: These experiments, of course, were performed in tobacco fields. How these fertilizer trials apply to potted plants, or plants in bags, or plants grown in aquaculture is unclear.