Data/hora: 13/05/2024 06:47:39

Biblioteca(s): 	Embrapa Solos.	
Data corrente: 	14/02/2022	
Data da última atualização: 	24/02/2022	
Autoria: 	VASQUES, G. de M.; RODRIGUES, H. M.; OLIVEIRA, R. P. de; HERNANI, L. C.; TAVARES, S. R. de L.	
Afiliação: 	GUSTAVO DE MATTOS VASQUES, CNPS; HUGO MACHADO RODRIGUES, UFRRJ; RONALDO PEREIRA DE OLIVEIRA, CNPS; LUIS CARLOS HERNANI, CNPS; SILVIO ROBERTO DE LUCENA TAVARES, CNPS.	
Título: 	Management zones from proximal soil sensors capture within-field soil property and terrain variations.	
Ano de publicação: 	2022	
Fonte/Imprenta: 	In: PEDOMETRICS BRAZIL, 2., 2021, Rio de Janeiro. Annals [...]. Rio de Janeiro: Embrapa Solos, 2022. Não paginado. Evento online.	
Idioma: 	Inglês	
Conteúdo: 	The objectives are to delineate soil management zones from soil proximal sensor data, and compare soil property values among zones in a 72-ha crop field in southeastern Brazil. Apparent electrical conductivity (aEC) and magnetic susceptibility (aMS), and equivalent Th (eTh) and U (eU) were measured across the field by a Geonics EM38-MK2 and a Medusa MS1200 sensors, respectively. These properties were kriged and used as input for delineating three management zones by fuzzy k-means clustering. Soil properties were measured at 0-10 cm at 72 sites, and their means were compared among the zones. Soil clay, organic C and exchangeable Ca and Mg vary significantly among the zones, according to Brown-Forsythe and Games-Howell tests (p=0.05), while pH, available P and exchangeable K do not. Zone delineation from proximal sensor data constitutes an efficient data-driven approach to separate the field into meaningful parts for soil, irrigation and crop management based on soil variation.	
Palavras-Chave: 	Gamma radiometrics.	
Thesaurus Nal: 	Electrical conductivity; Geophysics; Geostatistics; Precision agriculture.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/231294/1/Management-zones-from-proximal-soil-sensors-capture-2022.pdf	
Registro original: 	Embrapa Solos (CNPS)	
Exemplares: 	CNPS - (21003-1) - UPC - AA - DD -  -  -  - DIS