1. General Model Information

Name: Cranfield University Plantation Productivity Analyser for Tea

Acronym: CUPPA_TEA

Main medium: terrestrial
Main subject: agriculture
Organization level: Population
Type of model: ordinary differential equations
Main application:
Keywords: Camellia sinensis, tea


Robin Matthews

Silsoe College, Cranfield University, Beds. MK45 4DT, United Kingdom
phone: +44 (0) 1525 863008
fax: +44 (0) 1525 863384
email: r.b.matthews@cranfield.ac.uk

WWW: http://www.silsoe.cranfield.ac.uk/people/rmatthew.htm


Robin Matthews


The model simulates the behaviour of a population of shoots which develop and extend independently at different rates to simulate the variation observed in natural conditions. The number of shoots plucked at each harvest was found to be the crucial determinant of yield. Based on evidence from well-irrigated and well-fertilised tea in Tanzania, the model assumes that the seasonal pattern of yields is regulated by photoperiod through its effect on shoot dormancy, with the significant production peak normally obtained in September explained by the release from dormancy of a large number of buds at the winter solstice. Seasonal fluctuations in temperature and saturation deficit impose additional influences on patterns of shoot growth and development.

Author of the Abstract:

Robin Matthews

II. Technical Information

II.1 Executables:

Operating System(s): Windows 95
download from CUPPA Home

II.2 Source-code:

Programming Language(s): Delphi v2.0 , available by request from the author

II.3 Manuals:

CUPPA-Tea User Manual
download from CUPPA Home

II.4 Data:

Input and output data follow DSSAT v3.0 standards. Sample datasets are provided with the model.

III. Mathematical Information

III.1 Mathematics

http://www.cranfield.ac.uk/CUPPA/Tea_int1.htm ( "Why model tea?")

This Page is accessible from CUPPA Home Page

III.2 Quantities

shoot numbers, yield, biomass - total, leaf, stem, roots, shootswater uptake - soil water, plant water statusnitrogen dynamics - plant & soil nitrogen concentrations

III.2.1 Input

daily weather data - solar radiation, min/max temps., rainfall, humiditysoil data - saturated, upper and lower water contents, initial soil nitrogen contentsclonal data - shoot growth parameters

III.2.2 Output

output of yield, component biomasses, water & nitrogen status at user-specified intervals

IV. References

V. Further information in the World-Wide-Web

VI. Additional remarks

The model was designed for use as a management tool by researchers and growers in the tea industry.
Last review of this document by: Contributed by Robin Matthews Tue Nov 11 14:29:00 1997
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:41 CEST 2002

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