Data/hora: 10/06/2024 04:10:33

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	03/12/2018	
Data da última atualização: 	25/02/2019	
Autoria: 	IGARASHI, W. T.; SILVA, M. A. de A.; FRANÇA, J. A. de; IGARASHI, S.; SAAB, O. J. G. A.	
Afiliação: 	Wagner Teigi Igarashi, Universidade Estadual de Londrina - UEL/Departamento de Agronomia; Marcelo Augusto de Aguiar e Silva, Universidade Estadual de Londrina - UEL/Departamento de Agronomia; José Alexandre de França, Universidade Estadual de Londrina - UEL/Departamento de Engenharia Elétrica; Seiji Igarashi, Universidade Estadual de Londrina - UEL/Departamento de Agronomia; Otávio Jorge Grigoli Abi Saab, Universidade Estadual de Londrina - UEL/Departamento de Agronomia.	
Título: 	Estimation of soybean leaf wetness from meteorological variables.	
Ano de publicação: 	2018	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 53, n. 10, p. 1087-1092, Oct. 2018.	
Idioma: 	Inglês	
Notas: 	Título em português: Estimativa do molhamento foliar da soja a partir de variáveis meteorológicas.	
Conteúdo: 	The objective of this work was to determine models for the estimation of leaf wetness percentage at three heights in the soybean (Glycine max) canopy, using meteorological variables from stations installed at the crop site and at an agrometeorological station. The experiment was conducted in three harvest seasons, in an area cropped with soybean, in the municipality of Londrina, in the state of Paraná, Brazil. To collect the meteorological variables, electronic trees were installed at four heights (0.3, 0.6, 0.9, and 1.7 m) in the crop and a station was installed in an agrometeorological station. The data were separated according to days with and without rain, and the analyses of correlation and of simple and multiple regressions were carried out, in order to obtain models with equations for leaf wetness estimation. Most of the equations that did not use the data of the sensors installed at 1.7 m, especially those of the models based on variables only from the agrometeorological station, presented low reliability. The models obtained with meteorological data only from the soybean crop show high reliability and use a lower amount of variables, which makes them a good alternative for wetness estimation.	
Palavras-Chave: 	Leaf wetness sensors; Modelo empírico; Percentage of leaf wetness; Percentagem de molhamento foliar; Sensor de molhamento foliar.	
Thesagro: 	Glycine Max.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/187535/1/Estimation-of-soybean-leaf-wetness.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (63371-1) - UPE - AP - DD -  -  -  - DIS