There are three key nutrients for plants, nitrogen, phosphorus, and potassium. In fertilizer, this is known as the NPK ratio. With even a tiny imbalance, the soil will have a "nutrient deficiency." Also, the NPK is used to simulate how helpful salmon is to the nitrogen emitted into the soil. In our lab, the fertilizer is called fish fertilizer because of this simulation. Unfortunately, salmon runs faltered in previous years, and if they drop again, many plants won't be able to receive the salmon nutrients they previously relied on, and will struggle to survive.
In our lab, our fertilizers follow an NPK ratio, but have different amounts of potency. The amount of each of these will result in which plant has the most substantial growth, or which have the most successful reproduction.