Record Display for the EPA National Library Catalog

RECORD NUMBER: 24 OF 44

OLS Field Name OLS Field Data
Main Title Simulation of nitrogen movement, transformation, and uptake in plant root zone /
Author Davidson, James M. ; Graetz, Donald A. ; Rao, P. Suresh C. ; Selim., H. Magdi
Other Authors
Author Title of a Work
Davidson, James M.
CORP Author Florida Univ., Gainesville.;Environmental Research Lab., Athens, Ga.
Publisher Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1978
Report Number EPA-600/3-78-029; EPA-R-803607
Stock Number PB-280 712
OCLC Number 03984697
Subjects Soils--Nitrogen content. ; Plant-soil relationships. ; Plant-soil relationships. ; Soils--Nitrogen content.
Additional Subjects Plant physiology ; Plant nutrition ; Nitrogen ; Fertilizers ; Mathematical models ; Partial differential equations ; Nitrification ; Nitrogen inorganic compounds ; Ammonia ; Ion exchanging ; Adsorption ; Plant tissues ; Soil water ; Reaction kinetics ; Fortran ; Computer programs ; Denitrification
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=910171UZ.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJAD  EPA 600/3-78-029 Region 3 Library/Philadelphia, PA 04/16/1993
EJBD ARCHIVE EPA 600-3-78-029 Headquarters Library/Washington,DC 01/30/2013
EJBD  EPA 600-3-78-029 c.1 Headquarters Library/Washington,DC 02/03/2014
EKAM  EPA 600/3-78-029 Region 4 Library/Atlanta,GA 05/13/1994
ELDD  EPA-600/3-78-029 NHEERL/MED Library/Duluth,MN 05/06/2005
EOBD  EPA 600-3-78-029 NEIC Library/Denver,CO 01/14/2000
ESAD  EPA 600-3-78-029 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB-280 712 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation x, 106 p. : ill.
Abstract
A detailed research model and a conceptual management model were developed to describe the fate of nitrogen in the plant root zone. Processes considered in both models were one-dimensional transport of water and water-soluble N-species as a result of irrigation/rainfall events, equilibrium absorption-desorption, microbiological N-transformations, and uptake of water and nitrogen species by a growing crop. The research model was based on finite-difference approximations (explicit-implicit) of the partial differential equations describing one-dimensional water flow and convective-dispersive NH4 and NO3 transport along with simultaneous plant uptake and microbiological N-transformations. Ion-exchange (absorption-desorption) of NH4 was also considered. The micro-biological transformations incorporated into the model describe nitrification, denitrification, mineralization and immobilization.
Notes
"Grant no. R-803607." Bibliography: p. 67-76.