Organic Acids And Why You Should Be Using Them
Over the years, considerable interest has been shown in organic acids and their use in agriculture. These types of acids result from very old deposits of organic material that have decomposed for hundreds of thousands of years. This substance is decomposed much more than the humus that is so sought-after in the soil.
This dark brown to black product is often found near coal deposits in the earth's crust and originated as peat, brown coal, soil, or leonardite. At the molecular level it is an extremely large and complex molecule with no specifically identifiable structure. Organic acids can be broken down into three different parts: humic, fulvic, and humin.
Humic acid is the most commonly available form of organic acid and contains humic, fulvic and humin fractions. This is usually the raw product that has been mined, crushed and screened for proper size. The name humic "acid" is actually a misnomer because it has pH of 11 or higher. Most lawn and garden professionals will refer to humic acid as "humate". It comes in a dry granular form as well as liquid. Dry humic can be added to most dry fertilizer blends at a rate of 20 - 40 pounds per acre.
When blended with dry phosphate fertilizer, humic attracts microbes to the prills and enhances degradation of the waxy protective coating. This speeds up the rate at which the nutrients become available for plant use. Humic also acts like a chelating agent to protect phosphate from being tied up in the soil. This happens because humic has an enormous number of binding sites where nutrients can attach themselves and are protected until needed by a plant.
Liquid humic is commonly added to liquid nitrogen (UAN 32) or to liquid phosphate (10-34-0). UAN 32 is a very popular fertilizer used to top-dress winter wheat in northern Utah and Southern Idaho. The addition of humic to the fertilizer will minimize burning of the leaves and reduce the amount of nitrogen that can volatilize. It is not uncommon to use over 80 available units of nitrogen with the addition of humic on irrigated winter wheat. This is normally done as early as possible in the spring and usually in conjunction with an herbicide application using a ground rig.
Fulvic acid is most certainly acidic, containing a pH under 7 and is quite simple to extract the raw humic. It is rarely anything other than a translucent to amber colored liquid and the fulvic ratio can vary between brands. A number of herbicides and foliar nutrients work in response to the addition of fulvic to the spray tank. Fulvic, generally, is tremendously active in the plant and the soil but is only a minute proportion of the general humic.
Although Humins y are, for the most part, difficult to extract, they are also the most stable in the soil and present more direct plant activity when weighed against with fulvic. Because they are so difficult to extract, the best technique to apply humin to the soil is via the full humic acid in its raw form.
Organic acids profit the soil by raising the H2O hold capacity, accumulating stable organic matter to the soil, and escalating the nutrient holding capacity. When mixed directly to the nutrients being applied, organic acids amplify efficiency and help save the environment. A thorough research study done by the University of Idaho, suggests that organic acids provide an economic return to growers in nearly every trial. Should You Be Using Organic acids?
Tom Sharp is a Qualified Crop Adviser that is an authority in helping growers generate economical and environmentally sound crops. Tom suggests browsin to Intermountain Farmers Association for a wide range of effective agricultural supplies.
