1. General Model Information

Name: MANAGE-N 1.0 - Decision Support System for Nitrogen Management in Rice.

Acronym: MANAGE_N

Main medium: terrestrial
Main subject: agriculture
Organization level: population
Type of model: compartment model
Main application: decision support/expert system, research
Keywords: crop, rice, soil, nitrogen management, fertilizer management, N-application, optimization


Drs. J.J.M. Riethoven (1) Dr.ir. H.F.M. ten Berge. (2)
(1.) Research Institute for Agrobiology and Soil Fertility (AB-DLO), Dept. Agrosystems Research, P.O.Box 14, 6700 AA Wageningen, THE NETHERLANDS.
(2.) Research Institute for Agrobiology and Soil Fertility (AB-DLO), Dept. Agrosystems Research, P.O.Box 14, 6700 AA Wageningen, THE NETHERLANDS.
Phone: (1.) +31.317.475962 (2.)+31.317.475951 / 475953
Fax: (1.) +31.317.423110 (2.) +31.317.423110
email: j.j.m.riethoven@ab.dlo.nl berge@ab.dlo.nl



MANAGE-N: the user-friendly package for nitrogen management in rice. MANAGE-N (Riethoven et al., 1995) is a decision support tool for researchers and extension workers. The main purpose of MANAGE-N is to provide a sound agronomic basis for designing optimum nitrogen (N) fertilizer management strategies, for specific combinations of cultivar, site, season and soil type. When supplied with the proper parameter values, MANAGE-N generates information on: a) the highest attainable yield (versus fertilizer level), b) the highest attainable additional income from applied N fertilizer (versus fertilizer level), c) the optimal time path for N application at each N input level, d) yield response to specific split N application schemes, e) a site-and-cultivar calibration factor expressing productivity of light and nitrogen and f) patterns of N uptake, biomass accumulation and other intermediary variables. The core of the MANAGE-N package is the explanatory (process-based) simulation model ORYZA_0 (Drenth et al., 1994), which is embedded in a custom-made user-interface to provide easy communication with the model. The procedure of selecting input files, editing input data and viewing outputs (tabular and graphical) is completely supported by MANAGE-N in a user-friendly way. Fully automated numerical optimization of nitrogen application patterns allows the user to maximise grain yield for several fertilizer N input levels in one go. The package includes a context-sensitive help function that provides ample information on each topic, both with respect to on-screen structures like input windows as to theoretical background of MANAGE-N, the ORYZA_0 model and required crop and soil characteristics.

Purpose of the model:

Model parentage: ORYZA_0 .

Source of the AbstractCAMASE Register of Agro-ecosystems Models

II. Technical Information

II.1 Executables:

Operating System(s): IBM compatible PC or true compatible, CPU 8088 of higher, FPU (co-processor) recommended, graphics CGA and up. 3 Mb of diskspace total, including model and datafiles. Contract necessary: Costs: : Dfl. 150,=. Comments:

II.2 Source-code:

Programming Language(s): Microsoft FORTRAN-77 / FSE* 2.0 for the model.

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

Input check in model: Yes.

III.2.2 Output

Time interval of simulation: 1 Day.

IV. References

Drenth, H., H.F.M. ten Berge & J.J.M. Riethoven (Eds.), 1994. ORYZA simulation modules for potential and nitrogen limited rice production. SARP Research Proceedings. AB-DLO/Wageningen, WAU-TPE/Wageningen, IRRI/Los Banos. 223 pp.
Riethoven, J.J.M., H.F.M. ten Berge & H. Drenth (Eds.), 1995. Software developments in the SARP project: a guide to applications and tools. SARP Research Proceedings. AB-DLO/Wageningen, WAU-TPE/Wageningen, IRRI/Los Banos: 301 pp.

V. Further information in the World-Wide-Web

VI. Additional remarks

Parentage: ORYZA_0
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Status of the document:
last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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