Simulation modelling of land suitability evaluation for dry season peanut cropping based on water availability in Northeast Thailand: evaluation of the MACROS crop model

Katawatin, R. and Crown, P.H. and Grant, R.F. (1996) Simulation modelling of land suitability evaluation for dry season peanut cropping based on water availability in Northeast Thailand: evaluation of the MACROS crop model. Soil Use and Management, 12 (1). pp. 25-32.

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Abstract

The MACROS crop model was evaluated for its utility to generate information on land suitability for dry season groundnut cropping based on water availability at the regional scale in NE Thailand. The model was specific for the condition where crop growth is limited by water stress, and evaluated using both calibration and validation phases in sequence. In the model calibration, data sets from one field experiment were used to calibrate some parameters to obtain the best agreement between experimental and simulated results. The model validation consisted of a 'validation A', with emphasis on the accuracy and a 'validation B', with emphasis on the usefulness and relevance of the model. In the model validation A, data sets from field experiments were used to validate the model under different conditions. The dynamics of observed and corresponding simulated values of shoot dry weight agreed in every condition involved in this validation study. Also the simulated pod yields agreed with the field data. For the validation B, the model was further validated using data from 35 farm trials conducted at 5 different test sites. A high positive correlation (r=0.91) existed between observed and simulated pod yields

Item Type: Article
Additional Information: SNNigam Collection
Uncontrolled Keywords: Land evaluation, groundnut, models, water availability, Thailand
Author Affiliation: Department of Soil Science, Khon Kaen University, Khon Kaen 40002, Thailand
Subjects: Plant Protection
Crop Improvement
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 13 Jul 2013 12:35
Last Modified: 13 Jul 2013 12:35
Official URL: http://dx.doi.org/10.1111/j.1475-2743.1996.tb00526...
URI: http://eprints.icrisat.ac.in/id/eprint/10994

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