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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/pdfs/28/4/JEQ0280041235
Last checked: 12/12/2016
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| Publication Type:
| Refereed |
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| Author(s): | Hooda, P. S.;
Moynagh, M.;
Svoboda, I. F.;
Edwards, A. C.;
Anderson, H. A.;
Sym, G. |
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| Author Affiliation: | Hooda, Moynagh, Svoboda, & Sym: Scottish Agricultural College, Auchincruive, Ayr KA6 5HW, UK; and Edwards and Anderson, Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen AB15 8QH, UK |
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| Title: | Phosphorus loss in drainflow from intensively managed grassland soils |
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| Section: | Surface water quality
Other records with the "Surface water quality" Section
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| Source: | Journal of Environmental Quality. Vol. 28, No. 4, July/August 1999, p. 1235-1242. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
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| # of Pages: | 8 |
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| Keywords: | TIC Keywords: Phosphorus; Fate; Grasslands; Pastures; Trifolium; Leaching
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| Abstract/Contents: | "The loss of P in subsurface drainage from lysimeters (0.5 ha), managed as either monoculture grass or grass-clover for the last 9 yr have been quantified. Both systems received two to three cattle slurry applications annually and were cut two to three times before being gazed by dairy cattle. Mineral fertilizer-P was applied only to the grass-clover (about 25 kg P ha⁻¹ yr⁻¹). After 9 yr, NaHCO₃-soluble P in the topsoil (0-10 cm) averaged 38 and 47 mg P kg⁻¹ for the grass and grass-clover respectively, giving an average increase of 1.0 mg Olsen-P kg⁻¹ yr⁻¹ in the grass-clover. Drainage-weighted molybdate-reactive phosphorus (MRP) and total phosphorus (TP) concentrations ranged from 0.16 to 0.38 mg P L⁻¹ and 0.45 to 0.79 mg P L⁻¹, respectively during the 2-yr study period. The MRP and TP losses in subsurface-flow from the grass-clover (1.68-2.03 and 3.47-5.03 kg P ha⁻¹ yr⁻¹, respectively) were significantly larger than those from the grass (1.27-1.34 and 2.97-3.58 kg P ha⁻¹ yr⁻¹, respectively). Averaged across years and pastures, MRP accounted for 42% of the TP loss, while a non-MRP form accounted for 41% of the TP loss through field drains. Particulate-associated P represented about 17% of the TP loss. The P losses in subsurface runoff measured in the present study were much larger than previous estimates. The results also showed that, despite the subsoil having much larger P-sorption capacity than the topsoil, significant amounts of P losses could occur through preferential hydrological pathways." |
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| Language: | English |
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| References: | 36 |
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| Note: | Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Hooda, P. S., M. Moynagh, I. F. Svoboda, A. C. Edwards, H. A. Anderson, and G. Sym. 1999. Phosphorus loss in drainflow from intensively managed grassland soils. J. Environ. Qual. 28(4):p. 1235-1242. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/pdfs/28/4/JEQ0280041235
Last checked: 12/12/2016
Requires: PDF Reader
Notes: Item is within a limited-access website |
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MSU catalog number: S 900 .J6 |
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