Data/hora: 02/06/2024 16:21:53

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Multivariate analysis and geostatistics of the fertility of a humic rhodic hapludox under coffee cultivation	
Autores: 	Silva,Samuel de Assis; Lima,Julião Soares de Souza.	
Data: 	2012-04-01	
Ano: 	2012	
Palavras-chave: 	Coffea arabica L; Precision agriculture; Principal components; Cluster analysis.	
Resumo: 	The spatial variability of soil and plant properties exerts great influence on the yeld of agricultural crops. This study analyzed the spatial variability of the fertility of a Humic Rhodic Hapludox with Arabic coffee, using principal component analysis, cluster analysis and geostatistics in combination. The experiment was carried out in an area under Coffea arabica L., variety Catucai 20/15 - 479. The soil was sampled at a depth 0.20 m, at 50 points of a sampling grid. The following chemical properties were determined: P, K+, Ca2+, Mg2+, Na+, S, Al3+, pH, H + Al, SB, t, T, V, m, OM, Na saturation index (SSI), remaining phosphorus (P-rem), and micronutrients (Zn, Fe, Mn, Cu and B). The data were analyzed with descriptive statistics, followed by principal component and cluster analyses. Geostatistics were used to check and quantify the degree of spatial dependence of properties, represented by principal components. The principal component analysis allowed a dimensional reduction of the problem, providing interpretable components, with little information loss. Despite the characteristic information loss of principal component analysis, the combination of this technique with geostatistical analysis was efficient for the quantification and determination of the structure of spatial dependence of soil fertility. In general, the availability of soil mineral nutrients was low and the levels of acidity and exchangeable Al were high.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000200016	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832012000200016	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.36 n.2 2012	
Fonte: 	info:eu-repo/semantics/openAccess