Data/hora: 06/06/2024 02:50:43

Provedor de dados: | 91
País: | Brazil
Título: | Potassium estimation in the soil solution based on electrical conductivity and soil water content
Autores: | Andrade Neto,Torquato M. de; Coelho,Eugênio F.; Santana,José A. do V.; Santana Júnior,Edvaldo B.; Alves,Márcio da S.
Data: | 2012-06-01
Ano: | 2012
Palavras-chave: | TDR; Trickle irrigation; Fertirrigation.
Resumo: | The objective of this work was to evaluate and to validate models for estimating potassium in the soil solution as a function of bulk electrical conductivity (ECw), soil water content (q) and a soil solution electrical conductivity (ECss). Treatments consisted of using three concentrations of injecting solution of potassium chloride (1.0, 2.5 and 4.0 g L-1) which were applied by two trickle irrigation systems (microsprinkler and drip) during the first cycle of the banana crop cv. Terra Maranhão. Results showed that it is feasible to estimate potassium concentration in the soil solution from data of ECss and q obtained by time domain reflectometry (TDR) using an equation that combined a linear and a potential model. The estimated values of potassium concentration were close to the ones measured along the crop cycle under field conditions, with a mean normalized deviation of 10.0%, maximum and minimum deviation of 5.0 and 13.0%, respectively.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012000600005
Editor: | Departamento de Engenharia Agrícola  - UFCG
Relação: | 10.1590/S1415-43662012000600005
Formato: | text/html
Fonte: | Revista Brasileira de Engenharia Agrícola e Ambiental  v.16 n.6 2012
Fonte: | info:eu-repo/semantics/openAccess