NPK ratios only address what is immediately available, not what is available over time. Organic products will almost always display lower numbers. Don't get hung up on the values or the brand for that matter. Epsoma is pretty much as good as anything.
Not to discourage their use but note, the rice hulls will break down with time and will need to be replaced.
it’s mighty sad when average health has declined to the point that people become fatally ill from exposure to a little animal shit.
Solomon, Steve; Reinheimer, Erica (2012-12-04). The Intelligent Gardener: Growing Nutrient Dense Food (p. 271). New Society Publishers. Kindle Edition.