Evaluating the influence of storage time, sample-handling method, and filter paper on the measurement of water-extractable phosphorus in animal manures

Kristen Baum, Gary Pierzynski, Peter Kleinman, John Kovar, Rory Maguire, Philip Moore, Tiequan Zhang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Surface-applied manures create a potential phosphorus (P) runoff hazard, especially when unincorporated. In such cases, the concentration of water-extractable P in the manure has been correlated to soluble P concentrations in runoff. This study evaluated the influence of holding time, sample-handling procedure, and filtration method on measurement of the water-extractable P content of manures in a 3 x 3 x 2 factorial arrangement of treatments. A two-way interaction between holding time and sample-handling procedure occurred for most samples. Six samples had water-extractable P concentrations that were less than or equal to dried and dried/ground treatments. Only one sample had higher water-extractable P concentrations for fresh than for dried and dried/ground treatments. When significant differences occurred as a result of the filtration method, results for Whatman No. 40 filters, with a larger pore size than 0.45 μm nitrocellulose membranes, were usually higher. There was no significant difference in the coefficient of variation across sample-handling procedures, suggesting that efforts to dry and/or grind samples were not needed. These results support the adoption of a standardized protocol for measuring water-extractable P in manures that represents the appropriate balance between the ease of implementation and the strength of the correlation to P runoff concentrations.

Original languageEnglish (US)
Pages (from-to)451-463
Number of pages13
JournalCommunications in Soil Science and Plant Analysis
Volume37
Issue number3-4
DOIs
StatePublished - Feb 22 2006

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animal manures
manure
storage time
phosphorus
filter
runoff
water
sampling
methodology
method
paper
hazard
membrane

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Soil Science

Cite this

Baum, Kristen ; Pierzynski, Gary ; Kleinman, Peter ; Kovar, John ; Maguire, Rory ; Moore, Philip ; Zhang, Tiequan. / Evaluating the influence of storage time, sample-handling method, and filter paper on the measurement of water-extractable phosphorus in animal manures. In: Communications in Soil Science and Plant Analysis. 2006 ; Vol. 37, No. 3-4. pp. 451-463.
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Evaluating the influence of storage time, sample-handling method, and filter paper on the measurement of water-extractable phosphorus in animal manures. / Baum, Kristen; Pierzynski, Gary; Kleinman, Peter; Kovar, John; Maguire, Rory; Moore, Philip; Zhang, Tiequan.

In: Communications in Soil Science and Plant Analysis, Vol. 37, No. 3-4, 22.02.2006, p. 451-463.

Research output: Contribution to journalArticle

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