240-11 Agrometeorological MODEL for Estimation of LEAF Area INDEX in Irrigated Processing Tomato.
Poster Number 244
See more from this Division: ASA Section: Climatology & ModelingSee more from this Session: General Agroclimatology and Agronomic Modeling: II
Tuesday, November 4, 2014
Long Beach Convention Center, Exhibit Hall ABC
The leaf area index (LAI) is important information used in crop modellings. The objective of this research was to adjust a mathematical model that best describes the LAI of irrigated processing tomato, using a non-destructive method that uses photographs taken in situ and a public domain software (ImageJ). Samples were taken at 15, 30, 45, 60, 75, 105, 130 days after planting. For the photographic method a ruler of 1m2 was placed on the soil in 24 randomized sampling points, and for each point a photograph was taken. A Gaussian model was calibrated for LAI estimation in function of thermal sum from planting date. The model (Y=Y0+A·e-((X-X0)2)/2w2) was accurated (MAPE=0,4%) and precise (R2=0.94).
See more from this Division: ASA Section: Climatology & ModelingSee more from this Session: General Agroclimatology and Agronomic Modeling: II