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Title: COMPARISON OF POTATO SIMULATION MODELS UNDER EASTERN WASHINGTON CONDITIONS

Author
item MARCOS, J - WASHINGTON STATE UNIV
item FRAISSE, C - WASHINGTON STATE UNIV
item Timlin, Dennis
item Alva, Ashok

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/1/2003
Publication Date: 11/1/2003
Citation: MARCOS, J., FRAISSE, C., TIMLIN, D.J., ALVA, A.K. COMPARISON OF POTATO SIMULATION MODELS UNDER EASTERN WASHINGTON CONDITIONS. AGRONOMY ABSTRACTS. ON CD. 2003.

Interpretive Summary:

Technical Abstract: Potatoes are grown in the mid-Columbia Basin, WA as a major cash crop with approximately a billion dollars in production annually in the region. This production occurs under irrigation systems, predominantly center pivots and most of it on coarse, low organic matter, sandy soils subject to nitrogen leaching if excess water is applied. The overall objective of this study is to investigate the use of advanced tools and methodologies to sustain irrigated agricultural production and water quality in Eastern Washington. We believe that crop models can help producers to monitor and better manage irrigated crops in both spatial and temporal domains. The specific objective of this research study was to evaluate the use of two existing crop models (SIMPOTATO and SUBSTOR) as an aid for improved water and nitrogen management of potato cropping systems. The performance of the models was evaluated during four cropping seasons (1992-1995) and for two potato varieties (determinate and no-determinate) under two irrigation regimes (100 and 85 % of Potential evaporation). Modeling approaches used in both models were analyzed comparing simulated and measured crop development and growth.