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Humic substances account for 50 – 90% of cation exchange capacity in soils. "Humic substances" is an umbrella term covering humic acid, fulvic acid and humin, which differ in solubility. By definition, humic acid (HA) is soluble in water at neutral and alkaline pH, but insoluble at acidic pH < 2. Fulvic acid (FA) is soluble in water at any pH.
Impacts of acidic water and Soil acidification on plants could be minor or in most cases major. In minor cases which do not result in fatality of plant life include; less-sensitive plants to acidic conditions and or less potent acid rain. Also in minor cases the plant will eventually die due to the acidic water lowering the plants natural pH.
The ability of plants to absorb humic substances with their roots and metabolize them has been long debated. [58] There is now a consensus that humus functions hormonally rather than simply nutritionally in plant physiology , [ 59 ] [ 60 ] and that organic sunstances exuded by roots and transformed in humus by soil organisms are an evolved ...
Fulvic acid is the genus that contains the matter that has the lowest molecular weight, is soluble in acids and alkalis, and is susceptible to microbial action. Humic acid is the genus that contains the intermediate matter that has medial molecular weight, is soluble in alkalis and insoluble in acids, and has some resistance to microbial action.
Best Plants to Grow in Your USDA Hardiness Zone Northeast Groundcover: Perennial geranium ( Geranium spp) is a fast-growing groundcover with a spicy scent that deer and rabbits don’t like.
Compost is a mixture of ingredients used as plant fertilizer and to improve soil's physical, chemical, and biological properties. It is commonly prepared by decomposing plant and food waste, recycling organic materials, and manure.