I was watching a video about regenerative agriculture the other day (I can't remember which one) and one of its claims was that food isn't as nutritious as it u

I was watching a video about regenerative agriculture the other day (I can't remember which one) and one of its claims was that food isn't as nutritious as it used to be because of current farming practices. The theory was that when farmers fertilize crops the fertilizer only has common nutrients like nitrogen, phosphate and potassium, but like us plants need a wide variety of nutrients, and those don't exist in the soil anymore. Does anyone know if there is any truth to this? (i.e. links to papers)