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Effect of compost-, sand-, or gypsum-amended waste foundry sands on turfgrass yield and nutrient content

de Koff, J.P. and Lee, B.D. and Dungan, R.S. and Santini, J.B. (2010) Effect of compost-, sand-, or gypsum-amended waste foundry sands on turfgrass yield and nutrient content. Journal of Environmental Quality. 39:375-383.

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Abstract

To prevent the 7 to 11 million metric tons of waste foundry sand (WFS) produced annually in the USA from entering landfi lls, current research is focused on the reuse of WFSs as soil amendments. Th e eff ects of diff erent WFS-containing amendments on turfgrass growth and nutrient content were tested by planting perennial ryegrass (Lolium perenne L.) and tall fescue (Schedonorus phoenix (Scop.) Holub) in diff erent blends containing WFS. Blends of WFS were created with compost or acid-washed sand (AWS) at varying percent by volume with WFS or by amendment with gypsum (9.6 g gypsum kg–1 WFS). Measurements of soil strength, shoot and root dry weight, plant surface coverage, and micronutrients (Al, Fe, Mn, Cu, Zn, B, Na) and macronutrients (N, P, K, S, Ca, Mg) were performed for each blend and compared with pure WFS and with a commercial potting media control. Results showed that strength was not a factor for any of the parameters studied, but the K/Na base saturation ratio of WFS:compost mixes was highly correlated with total shoot dry weight for perennial ryegrass (r = 0.995) and tall fescue (r = 0.94). Th is was further substantiated because total shoot dry weight was also correlated with shoot K/Na concentration of perennial ryegrass (r = 0.99) and tall fescue (r = 0.95). A compost blend containing 40% WFS was determined to be the optimal amendment for the reuse of WFS because it incorporated the greatest possible amount of WFS without major reduction in turfgrass growth.

Item Type: Article
NWISRL Publication Number: 1331
Subjects: Soil
Depositing User: Michelle Wayment
Date Deposited: 08 Jan 2010 03:49
Last Modified: 14 Oct 2016 14:47
Item ID: 1354
URI: https://eprints.nwisrl.ars.usda.gov/id/eprint/1354

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