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Alteration of Sulfur‐34 Natural Abundance in Soil by Application of Feedlot Manure
Author(s) -
Chae Yeh Moon,
Krouse H. Roy
Publication year - 1986
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1986.03615995005000060010x
Subject(s) - manure , feedlot , soil water , environmental science , agronomy , soil horizon , water table , zoology , chemistry , environmental chemistry , soil science , groundwater , geology , biology , geotechnical engineering
The 34 S/ 32 S abundance ratios (δ 34 S) of four forms of S present in cattle feedlot manure and at various depths in profiles of a soil receiving different rates of manure were determined. Whereas the δ 34 S values for all S forms in manure were similar (−2.8–3.6) they differed markedly among different forms of soil S (+1.6 for Raney Nireducible S to +6.2 for HI‐reducible S). Effects of manure applications on the isotopic composition of S were observed for most S forms only at the soil surface or in shallower horizons. In contrast, the δ 34 S values and concentrations of C‐bonded S indicated penetration of manure S down to or near the water table, particularly in the profile which had received a high rate of manure application. The NO ‐ 3‐ ‐N distribution in the soil profiles showed that manure NO ‐ 3‐ ‐N had also moved down below the water table. Therefore, it is concluded that C‐bonded S is the best form for tracing the down‐ward movement in soils of S‐bearing compounds in manure.