Good quality humic acid is a valuable material - used in small quantities -
but beware there are some coal based products that are detrimental to plant
growth so you need to test first or know someone that has used the product
successfully on crop plants. There are humates made for use in mining (for
addition to drilling mud) that just dont work in agriculture.
LCharles
Lloyd - It's o.k. and appropriate to name the brands that you work
worth and to suggest other brands that you've heard work well on
biological soils. -Allan
