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http://dx.doi.org/10.12791/KSBEC.2022.31.4.325

Estimation of Leaf Area Using Leaf Length, Leaf width, and Lamina Length in Tomato  

Lee, Jae Myun (Department of Horticulture, Kongju National University)
Jeong, Jae Yeon (Department of Horticulture, Kongju National University)
Choi, Hyo Gil (Department of Horticulture, Kongju National University)
Publication Information
Journal of Bio-Environment Control / v.31, no.4, 2022 , pp. 325-331 More about this Journal
Abstract
One of the most important factors in predicting tomato growth and yield is the leaf area. Estimating leaf area accurately is the beginning of an effective tomato plant growth assessment model. To this end, this study was conducted to identify the most effective model for estimating plant leaf area through the measurement of tomato plant leaves. Leaf area (LA), leaf length (L), leaf width (W), and lamina length (La) were measured for all leaves of 5 plants at two-week intervals. The correlation between LA and tomato-leaf-independent variables showed a strong positive relationship with the formulas La × W, L × W, La + W, and L + W. For LA estimation, a linear model using the formula LA = a + b (La2 + W2) gave the most accurate estimation (R2 = 0.867, RMSE = 88.76). After examining the positions of upper, middle, and lower leaves from September to December, the coefficient of determination (R2) values for each model were 0.878, 0.726, and 0.794 respectively. The most accurate estimation came from the model that used the upper leaves of the plants. The high accuracy of the upper-leaf-based model is judged by the 50% defoliation performed by farmers after October.
Keywords
defoliation; leaf growth; leaf position; modeling;
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