Humic acid is a principal component of humic substances, which are the major organic constituents of soil (humus), peat, coal, many upland streams, dystrophic lakes, and ocean water.t is produced by biodegradation of dead organic matter. It is not a single acid; rather, it is a complex mixture of many different acids containing carboxyl and phenolate groups so that the mixture behaves functionally as a dibasic acid or, occasionally, as a tribasic acid.
Noteworthy Characteristics. Picea abies, commonly called Norway spruce, is a large pyramidal evergreen conifer that is native to the mountains of northern and central Europe east to the Urals. In its native European habitat, it typically matures to 100-150' (occasionally to 200') tall.
Sitka Spruce (Alaskaâs State Tree) The Sitka Spruce (Picea sitchensis) is a large evergreen tree growing to 120-180 feet tall, and with a trunk diameter of 3-5 feet. It is by far the largest species of spruce, and the third tallest tree species in the world (after Coast Redwood and Coast Douglas-fir).