Full TGIF Record # 20634
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Publication Type:
Author(s):Duble, Richard L.
Author Affiliation:Extension Turfgrass Specialist, Texas A&M University
Title:Iron chlorosis in turfgrass
Source:Texas Turfgrass. Vol. 42, No. 2, Summer 1989, p. 7, 23.
# of Pages:2
Publishing Information:College Station, TX: Texas Turfgrass Association, Inc., 1003 Howe
Keywords:TIC Keywords: Iron chlorosis; Nutrients; Minerals
Abstract/Contents:Iron chlorosis results if there is insufficient iron for the leaf tissue to develope green chlorophyll. Areas characterized by high pH, calcareous soils, such as western and southern Texas, are impacted by iron chlorosis. Iron is not part of the chlorophyll molecule. It is one of the nutrients required for chlorophyll synthesis. Factors contributing to iron deficiency in the soil are:1) high levels of bicarbonates in the soil which form a complex that locks up the iron. 2)Excessive irrigation and soil compaction result in poorly areated soil and reduced iron uptake by plants. 3)Environmental factors such as low soil temperatures, too wet or too dry soils, and low light intensity reduce iron uptake. Iron chlorosis is common in St. Augustine grass under shaded conditions. Some grasses of the same species differ in their ability to take up to take up iron. To correct iron chlorosis, the acidification of alkaline soils by the addition of sulfur or sulphuric acid has been shown effective by experience. Elemental sulfur is oxidized in the soil to yield sulphuric acid. For turfgrasses apply 5 to 20 pounds of elemental sulfur per 1000 sq. ft. Or add dilute sulfuric acid to the irrigation water. Both methods increase dissolved salts, so correct any drainage problems first, or else salts would accumulate. You can add iron to the soil for a temporary improvement. Applications of Iron-Sul (a product of the Duval Sales Corporation) at 10 pound per 1000 sq. ft. have been effective.
Note:Partial reprint appears in Quarterly News Bulletin of the Southern Turfgrass Association, 24(2) Summer 1989, p. 9
Pictures, color
Geographic Terms:Southwest
See Also:Other items relating to: IRON
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Duble, R. L. 1989. Iron chlorosis in turfgrass. Tex. Turfgrass. 42(2):p. 7, 23.
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MSU catalog number: SB 433 .A1 T75
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