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United States Department of Agriculture

Agricultural Research Service

Research Project: DEMONSTRATING UTILITY IN TRELLIS TENSION MONITORING Project Number: 5358-21000-041-19
Project Type: Specific Cooperative Agreement

Start Date: Jan 05, 2010
End Date: Sep 30, 2012

Objective:
Statistical analyses of 7-year database from Trellis Tension Monitors (TTM) in Washington state and three-year database from TTM installations in California, to determine 1) spatial distribution needed for yield estimation with TTMs; 2) accuracy of yield estimation; 3) accuracy of detecting key grapevine phenological stages from the continuous tension trace; and 4) accuracy of yield estimation under physically constrained and open-ended TTM systems.

Approach:
Complete field data collection; compute classic univariate descriptors; define linear and nonlinear models; complete geostatistical characterization of yield at research sites; and model yields from dynamic trellis tension values. Documents SCA with BioDataManagement.

Last Modified: 10/21/2014
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