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Articles by Gustavo Henrique Gottardo Loff
Total Records ( 1 ) for Gustavo Henrique Gottardo Loff
  Matheus Langhi Alves , Mariana Conceicao de Souza , Gustavo Henrique Gottardo Loff , Rodrigo Araujo Marques , Paulo Eduardo Teodoro , Caio Cezar Guedes Correa , Carlos Antonio da Silva Junior and Francisco Eduardo Torres
  Models to estimate leaf area according to the linear dimensions of leaves have been developed in several green manure crops. The aim of this work was to model and identify the best models for estimating the leaf area determined by digital photos in sun. The trial was installed in the experimental area of the State University of Mato Grosso do Sul-Unit University Aquidauana (UEMS/UUA), Brazil. During the growth and development of plants, randomly 200 expanded leaves of the lower, middle and superior portions were collected in order to obtain the plant canopy representation. These leaves were separated into two samples; the first with 150 leaves was used to generate mathematical models for measuring the leaf area and the second with 50 leaves was used to validate the generated equations and identify the best accuracy. At each collected leaf was measured the length and width. Subsequently, it was calculated the product of length×width. Then, the real leaf area for all 200 leaves was determined by digital photos. The linear model based on the product between length×width is the most appropriate to estimate sunn leaf area, because it had the highest Pearson linear correlation coefficient, lower mean square error and lower root mean square error.
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