HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Related articles in JEQ Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (28) Citing Articles via Google Scholar Google Scholar Articles by Vadas, P. A. Articles by Sharpley, A. N. Search for Related Content PubMed PubMed Citation Articles by Vadas, P. A. Articles by Sharpley, A. N. Agricola Articles by Vadas, P. A. Articles by Sharpley, A. N. Related Collections Animal Waste Nutrients Soil Models Water Pollution Phosphorus

A Simple Method to Predict Dissolved Phosphorus in Runoff from Surface-Applied Manures

USDA-Agricultural Research Service, Pasture Systems and Watershed Management Research Unit, Building 3702, Curtin Rd., University Park, PA 16802-3702

View larger version (26K): [in a new window]   Fig. 1. (a) Dissolved inorganic P release from fresh dairy, poultry, and swine manures as a function of water to manure ratio during extraction, and (b) P release expressed as a fraction of the maximum release observed at a water to manure ratio of 250:1. Data are from Dou et al. (2000)(2002) and Kleinman et al. (2002b).

View larger version (25K): [in a new window]   Fig. 2. Relationship between (a) dissolved inorganic and (b) organic P released from manures and composts subjected to five consecutive simulated rainfall leaching events as measured by Sharpley and Moyer (2000) and as predicted by Eq. [2], [3], and [4].

View larger version (23K): [in a new window]   Fig. 3. (a) Relationship between dissolved inorganic phosphorus (DIP) concentrations in runoff from soil boxes where manures had been surface-applied and subjected to simulated rainfall as measured in this study and by Kleinman et al. (2003, 2002a) and Kleinman and Sharpley (2003) and as predicted by Eq. [2], [3], and [4]. (b) Relationship between runoff to rainfall ratio and dissolved inorganic P concentrations in runoff, expressed as a ratio of the maximum concentration, as measured by Kleinman et al. (2002a).

View larger version (24K): [in a new window]   Fig. 4. Relationship between dissolved inorganic phosphorus (DIP) concentrations in runoff from soil boxes where manures had been surface-applied and subjected to simulated rainfall as measured in this study and by Kleinman et al. (2003, 2002a) and Kleinman and Sharpley (2003) and as predicted by Eq. [2], [3], and [4] with (a) an adjustment for the ratio of runoff to rainfall, and (b) a second adjustment based on the initial infiltration of manure dissolved P in the freely draining liquid of swine and dairy manures.

View larger version (23K): [in a new window]   Fig. 5. Relationship between dissolved inorganic P concentrations in runoff from soil boxes where manures had been surface-applied and subjected to simulated rainfall as measured by Kleinman and Sharpley (2003) and as predicted by Eq. [2], [3], and [4] with adjustment factors for (a) a first runoff event 72 h after manure application, (b) a second consecutive runoff event 10 d after manure application, and (c) a third consecutive runoff event 24 d after manure application. DIP, dissolved inorganic phosphorus.