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Title: CROPSYST VB-SIMPOTATO, A CROP SIMULATION MODEL FOR POTATO-BASED CROPPING SYSTEMS: I. MODEL DEVELOPMENT

Author
item MARCOS, JAVIER - WSU, PULLMAN
item Alva, Ashok
item STOCKLE, CLAUDIO - WSU, PULLMAN
item Timlin, Dennis
item Reddy, Vangimalla

Submitted to: International Crop Science Congress Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 6/1/2004
Publication Date: 9/26/2004
Citation: Marcos, J., Alva, A.K., Stockle, C., Timlin, D.J., Reddy, V. 2004. CROPSYST VB-SIMPOTATO, a crop simulation model for potato-based cropping systems: 1. model development. International Crop Science Congress Proceedings. (On CD)

Interpretive Summary: Crop simulation models are valuable decision tools to improve production practices aimed to optimize production and net returns, while minimizing negative environmental impacts. This paper describes development of a potato growth simulation model, i.e. SIMPOTATO, and integration of this model with CROPSYST model which facilitates evaluation of fate and transport of nitrogen in a potato rotation system. The application of CROPSYST-SIMPOTATO model to predict the fate and transport of N in potato production system in the Pacific Northwest of the United States is presented in a companion paper.

Technical Abstract: Crop simulation models, coupled with field data, can predict the fate and transport of N while providing basis for improved crop management practices. The potato crop simulation model SIMPOTATO was integrated into the multi-year, multi-crop simulation model CropSyst VB to improve overall model capabilities for the assessment of N dynamics in potato-based cropping systems. In the integrated model, CropSyst VB simulates the soil-water-plant atmosphere system for a crop rotation, as well as the water and nitrogen budgets. When the crop in the rotation is potato, SIMPOTATO simulates potato growth and development and plant C and N balances. Descriptions of growth and phenology submodels of the SIMPOTATO component are presented here since this model has not been very well documented and was modified from its original version for this integration. In addition, a simulated scenario is included to illustrate model capacities for the prediction of the fate and transport of N under different N management and water levels for a typical crop rotation in the region.