Leaf area estimation by considering leaf dimensions in olive tree

2018 ◽  
Vol 240 ◽  
pp. 440-445 ◽  
Author(s):  
Georgios Koubouris ◽  
Dimitris Bouranis ◽  
Efraim Vogiatzis ◽  
Abdolhossein Rezaei Nejad ◽  
Habtamu Giday ◽  
...  
2015 ◽  
Vol 75 (1) ◽  
pp. 152-156 ◽  
Author(s):  
MC. Souza ◽  
CL. Amaral

Leaf area estimation is an important biometrical trait for evaluating leaf development and plant growth in field and pot experiments. We developed a non-destructive model to estimate the leaf area (LA) of Vernonia ferruginea using the length (L) and width (W) leaf dimensions. Different combinations of linear equations were obtained from L, L2, W, W2, LW and L2W2. The linear regressions using the product of LW dimensions were more efficient to estimate the LA of V. ferruginea than models based on a single dimension (L, W, L2 or W2). Therefore, the linear regression “LA=0.463+0.676WL” provided the most accurate estimate of V. ferruginea leaf area. Validation of the selected model showed that the correlation between real measured leaf area and estimated leaf area was very high.


Author(s):  
M. Toebe ◽  
P.J. Melo ◽  
R.R. Souza ◽  
A.C. Mello ◽  
F.L. Tartaglia

2019 ◽  
Vol 41 (1) ◽  
pp. 43494
Author(s):  
João Everthon da Silva Ribeiro ◽  
Ester Dos Santos Coêlho ◽  
Francisco Romário Andrade Figueiredo ◽  
Walter Esfrain Pereira ◽  
Manoel Bandeira de Albuquerque

Bragantia ◽  
2018 ◽  
Vol 77 (2) ◽  
pp. 221-229 ◽  
Author(s):  
Rafael Vieira Pezzini ◽  
Alberto Cargnelutti Filho ◽  
Bruna Mendonça Alves ◽  
Diego Nicolau Follmann ◽  
Jéssica Andiara Kleinpaul ◽  
...  

2019 ◽  
Vol 49 (4) ◽  
Author(s):  
Marcos Toebe ◽  
Rafael Rodrigues de Souza ◽  
Anderson Chuquel Mello ◽  
Patrícia Jesus de Melo ◽  
Alexandre Segatto ◽  
...  

ABSTRACT: The objectives of this work were estimate the leaf area of squash ‘Brasileirinha’ by linear dimensions of the leaves and check models available in the literature. An experiment was conducted in the 2015/16 sowing season. Were collected 500 leaves and in each one, were measured the length (L), width (W) and length×width product (LW) and determined the real leaf area (LA). Then, 400 leaves were separated to generate models of the leaf area (LA) as a function of linear dimension (L, W or LW) of squash. The remaining 100 leaves were used for the validation of models. A second experiment was conducted in the 2016/17 sowing season. Were collected 250 leaves, used only for the validation of the models of the first experiment. There is collinearity between L and W and, therefore, models using the LW product are not recommended. The model LA=0.5482W2 + 0.0680W (R²=0.9867) is adequate for leaf area estimation of squash ‘Brasileirinha’.


2020 ◽  
Vol 12 (2) ◽  
pp. 144-147
Author(s):  
M.A. Mhanna

Abstract. The study was conducted on “Khoderi” olive cultivar planted in Jableh Region-Latakia province, Syria in 2017 in order to evaluate some mathematical models adapted for olive single leaf area estimation. Leaf samples were taken from the middle of one-year branches. Actual areas of the leaves were measured using Adobe Photoshop CS5. Leaf dimensions (length and width) were measured accurately. Coefficients of determination were estimated for the relation between leaf dimensions and the actual area. The best coefficient of determination was between the natural logarithm of the product (leaf length × leaf width) and the natural logarithm of leaf area (R2= 0.962). Linear regression equation of the mentioned relation was fitted and evaluated. The accuracy of the new model (A=e0.9509ln LW – 0.2867) was compared to other models commonly used for olive single leaf area estimation. The comparison showed no significant differences between leaf area obtained by the new model and the actual leaf area values (p=0.01), whereas significant differences were found for the other models. The new model showed the lowest Root Mean Square Error (RMSE) and high efficiency in estimating olive leaf area of “Khoderi” cultivar in two different environments; the same results were obtained for olive cultivar “Picholine” the French. We recommend the new model for olive single leaf area estimation.


Author(s):  
Mikhail Astashev ◽  
Olga Beloshapkina ◽  
Andrey Kvitko ◽  
Alexey Matasov ◽  
Roman Zakharyan ◽  
...  
Keyword(s):  

2010 ◽  
Vol 21 (1) ◽  
pp. 73-76 ◽  
Author(s):  
Jun Diao ◽  
Xiang-dong Lei ◽  
Ling-xia Hong ◽  
Jian-tao Rong ◽  
Qiang Shi

2017 ◽  
Vol 109 (5) ◽  
pp. 1960-1969 ◽  
Author(s):  
Laura Mack ◽  
Filippo Capezzone ◽  
Sebastian Munz ◽  
Hans-Peter Piepho ◽  
Wilhelm Claupein ◽  
...  
Keyword(s):  

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