| 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 |
|
| 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
|
| 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 |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EJBD |
EPA 600-3-78-029 |
c.1 |
Headquarters Library/Washington,DC |
02/03/2014 |
| ELBD ARCHIVE |
EPA 600-3-78-029 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| ELBD |
EPA 600-3-78-029 |
|
AWBERC Library/Cincinnati,OH |
03/29/2021 |
| ESAD |
EPA 600-3-78-029 |
|
Region 10 Library/Seattle,WA |
03/23/2010 |
| NTIS |
PB-280 712 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
x, 106 pages : illustrations, figures, tables ; 28 cm. |
| 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 |
EPA Grant No. Contract Number: R-803607. Includes bibliographical references (pages 67-76). |
