Ann: OHD Project Update, page-187

Ohd is a bio stimulate not a fertiliser. Big difference. Fertilizers provide plants with one or more of the nutrients a plant requires to grow, with nkp the main 3 plants needs and by far the 3 most popular nutrients farmers want/need. Bio stimulants usually contain little to no nkp and work in a different way to promote growth then ferts.
No matter how good a bio stimulate is the soil will need to be fertilised to replace the nutrients that a previous crop has taken from the soil to maintain a healthy soil. Ie there is nothing that will ever replace fertilizers.