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- W1997211265 abstract "Repeated application of animal manures to Saskatchewan soils has led to interest in the fate and distribution of residual manure P in the soil. The concentrations of soil phosphorus in various inorganic and organic fractions were investigated in soils sampled from long-term field research plots (Dixon, SK) with a 5-yr history of annual application of liquid swine manure or solid cattle manure at low, medium and high rates. The soil type at the research site is a loamy textured Black Chernozem (Cudworth Association). Annual rates of manure application over the 5 yr were based on the N contents in the manures and were equivalent to 0 (control), and approximately 100 (low), 200 (medium) and 400 (high) kg total N ha -1 yr -1 as manure. For comparison, urea alone was also applied at rates of 50, 100 and 200 kg N ha -1 yr -1 . The total P concentration in the surface soil (0&ndash15 cm) was significantly increased only by the addition of cattle manure and only in the medium and high rate treatments compared to the control. The most labile P fractions (Resin-P and NaHCO 3 -P) were also significantly increased with increasing rate of cattle manure addition. No significant increases in either soil total P or labile P fractions were observed in liquid swine manure treatments, which is attributed to the lower amount of P added with the swine manure treatment than the cattle manure treatment. Added P in the swine manure treatment more closely matched P removal in crop harvest compared to cattle manure treatment, which had more P added than was removed by the crop. Key words: Phosphorus fractions, labile P fraction, sequential P extraction, urea, swine manure, cattle manure" @default.
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- W1997211265 date "2004-08-01" @default.
- W1997211265 modified "2023-09-25" @default.
- W1997211265 title "Phosphorus amounts and distribution in a Saskatchewan soil after five years of swine and cattle manure application" @default.
- W1997211265 doi "https://doi.org/10.4141/s03-016" @default.
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