Full TGIF Record # 112970
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Web URL(s):http://www.sciencedirect.com/science/article/pii/S0167880999000031
    Last checked: 10/09/2015
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Publication Type:
i
Report
Author(s):Ekholm, Petri; Kallio, Kari; Turtola, Eila; Rekolainen, Seppo; Puustinen, Markku
Author Affiliation:Ekholm, Kallio, Rekolainen, and Puustinen: Finnish Environment Institute, Helsinki, Finland, Turtola: Agricultural Research Center of Finland, Jokioien, Finland
Title:Simulation of dissolved phosphorus from cropped and grassed clayey soils in southern Finland
Source:Agriculture, Ecosystems, and Environment. Vol. 72, No. 3, February 22 1999, p. 271-283.
# of Pages:13
Publishing Information:Amsterdam: Elsevier Science Publishers
Keywords:TIC Keywords: Agriculture; Clay soils; Eutrophication; Evaluations; Models; Organic matter; Surface runoff
Abstract/Contents:"Agricultural phosphorus (P) loading is a major contributor to eutrophication of surface waters in Finland. Of the various forms of P in runoff from cultivated fields, dissolved reactive phosphorous (DRP) is immediately available for algal growth and can directly accelerate eutrophication. The applicability of an empirical model develped in southeastern USA was evaluated by simulation DRP in surface runoff from two cropped and grassed clayey soils (Vertic Cambisols) is southwestern Finland. The model relates DRP in a runoff event, e.g. to desorbable soil p (PD), runoff volume (V) and the concentration of total suspended solids (TSS) in runoff. The model overestimated the mean concentration of DRP by a factor of 110-1645. In addition, the observed and simulated mean concentrations of DRP in plots with different winter covers, crops, and P status did not correlate with each other. The predictions improved when (PD) was estimated by water extractions instead of Bray extractions, and the model was simplified by excluding the dependence of DRP concentratio on V. The correct level of results could, however, only be achieved by calibration. In order to improve the model fit, the dependence of DRP concentration on V, runoff duration and TSS should be assessed under Finnish conditions and the model should be modified accordingly."
Language:English
References:35
Note:Tables
Graphs
Geographic Terms:Southern Finland
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Ekholm, P., K. Kallio, E. Turtola, S. Rekolainen, and M. Pusstinen. 1999. Simulation of dissolved phosphorus from cropped and grassed clayey soils in southern Finland. Agric. Ecosyst. Environ. 72(3):p. 271-283.
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Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0167880999000031
    Last checked: 10/09/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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