Golf Course Management

JAN 2018

Golf Course Management magazine is dedicated to advancing the golf course superintendent profession and helping GCSAA members achieve career success.

Issue link: http://gcmdigital.gcsaa.org/i/918033

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HUMIC ACID PRECURSOR Foliar Uptake Soil Uptake THE THREE HUMIC FRACTIONS NATURALLY DERIVED BIO-ORGANIC CARBON SOURCES FULVIC ACIDS HUMIC ACIDS HUMINS FULVIC ACIDS are highly soluble and readily absorbed by leaves, making them well-suited for foliar application. Fulvic acids enhance the absorption of nutrients and the efficiency of plant metabolic reactions. HUMIC ACIDS are moderately soluble. They have a high cation exchange capacity (CEC), which helps increase a soil's nutrient holding capacity. Humic acid molecules chelate many essential nutrients and help stimulate soil microbiology. HUMINS are the least soluble form of humic substances. They contain high levels of carbon and have large nutrient holding capacity. Humins persist in soils for very long periods of time. In addition to the three humic fractions, humic products utilizing The Andersons Dispersing Granule (DG) Technology contain a unique and powerful ingredient we call humic acid precursor. HUMIC ACID PRECURSOR contains a soluble form of organic carbon that releases into the soil as DG granules disperse. Through biochemical reactions, it is transformed into humic and fulvic acids, enhancing nutrient uptake and improving soil health. BIOCHEMICAL REACTIONS IN THE SOIL Highly Soluble Insoluble Low Molecular Weight High Molecular Weight T H E P O W E R O F H U M I C A C I D 24 HUMIC PRODUCTS HUMIC SUBSTANCES A POWERFUL TOOL IN TURF MANAGEMENT Humates, or humic substances, are a naturally occurring, mined material. Similar to coal, humates occur as a result of compression and degradation of ancient deposits of plant and animal remains. The compression and degradation of nutrient-rich materials produces a highly reactive, carbon rich material that is a powerful addition to a turf management program. Humates make up 60-80% of soil organic matter. 1 Soil organic matter is the organic, carbon-containing component of a soil; this includes living organisms, partially degraded tissue and fully degraded tissue (humates). 1 Soil organic matter is a small portion of the soil, but provides substantial benefit to soil and plants. Soil organic matter provides nutrient holding capacity, water holding capacity and stable aggregates. These properties are particularly beneficial on sandy soils, such as greens. Humates provide numerous benefits, including: • Enhanced nutrient efficiency and cation exchange capacity • Humic acid is highly interactive with nutrients in the soil. It reacts with nutrients through chelation and complexation, which keeps applied nutrients available to the plant. • Enhanced soil biology • Humic acid supports microorganisms by giving them food to eat and a habitat. The presence of microorganisms has a positive impact on turf vigor and stress tolerance. Microbes support soil and overall plant health by making nutrients available to plants in the inorganic form. • Enhanced soil structure, porosity and water holding capacity • Humic acids physically modify soil structure by binding soil particles together. Humates are composed of three major fractions: fulvic acids, humic acids, and humins. Each of these fractions has some similar and some unique physical and chemical properties that contribute to their effectiveness and complement fertilizer programs. Our products contain all three forms of humic substances, so the benefits of each are enjoyed.

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