Humic and fulvic acid application "had no effect"

I was searching for dissolved organic carbon and the hundredth-molar calcium chloride extraction (0.01 M CaCl₂) and turned up an interesting research article that not only has those, it also has grass, humic and fulvic acid application, and an assessment of nutrient uptake and soil nutrient availability. More highlights from the article below, but first I want to highlight this related item:

- Dr. Bryan Hopkins and I spoke on the ATC Doublecut show about carbon in fertilizers, nutrient availability,…