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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Wehtje, G.;
Walker, R. H.;
Shaw, J. N. |
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| Author Affiliation: | Alabama Agricultural Experiment Station, Auburn. AL 36849 |
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| Title: | Pesticide sorption by inorganic amendments used on golfputting greens |
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| Section: | Soil and environmental aspects of weed science
Other records with the "Soil and environmental aspects of weed science" Section
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| Meeting Info.: | 52nd Annual Meeting, Greensboro, NC, January 25-27, 1999 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 52, 1999, p. 191-192. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Adsorption; Pesticides; Soil amendments; Fenarimol; Golf greens; Oxadiazon; Imazaquin; Soil solution; Zeolites; Diatomaceous earth; Clay; Golf green construction; Topdressing; Pesticide fate
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| Abstract/Contents: | "Adsorptive ability of seven inorganic amendments, which are used in golf putting greens, toward oxadiazon, fenarimol and imazaquin were evaluated using a soil solution technique. Amendments evaluated included Clinolite, Ecolite, Pro's Choice, Motan Plaus, Isolite, Profile, Axis, and Green's Choice. These amendments are derived from various naturally- occurring deposits of zeolites, diatomaceous earths and/or clays; typically they are fired. Intent is to provide long- lived, stable, and uniform-sized, particle that can contribute favorable water- and nutrient-retention properties. Their use includes incorporation into the media during greens construction and as a top dressing following mechanical arification. Amendments offer an alternative to sand/peat mixtures which are historically used for these purposes. Samples of the amendments were wetted to field capacity and spiked to 1 ppm (dry weight basis) with the aforementioned pesticides using both formulated and ¹⁴C-labelled materials. Water was extracted by centrifugation after a 24-h equilibration period. Aliquots were subjected to quantification of radioactivity. Samples were rewetted with fresh water at a volume equivalent to that extracted. Five cycles of extraction, rewetting and equilbration were conducted over a five-day period. Sand, peat and a native soil (Dothan loamy sand) were included for comparative purposes. Amendments evaluated had considerable variation in CEC, surface area and field capacity. 'Retention' of pesticides (i.e. quantity not recovered in extracted solution) was also variable; but generally more than that of sand and frequently equivalent to peat. Calcium saturation reduced fenarimol 'retention' by at least 2% (Green's choice), and up to 56% (Clinolite). Pesticide 'retention' by amendments is probably the sum of both true adsorption and entrapment. Scanning electron microscopy revealed that the particles of some amendments are extremely porous. Since the addition of amendments to puttin greens generally does not exceed 20% (v/v), their impact on pesticide performance is probably minimal. In the extreme, they can be considered as comparable to peat." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Wehtje, G., R. H. Walker, and J. N. Shaw. 1999. Pesticide sorption by inorganic amendments used on golfputting greens. South. Weed Sci. Soc. Proc. 52:p. 191-192. |
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MSU catalog number: SB 611 .S6 v.52 |
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