Título:	Machine traffic and soil penetration resistance in guava tree orchards.
Autoria:	SOUZA, W. J. O. de ROZANE, D. E. SOUZA, H. A. de NATALE, W. SANTOS, P. A. F. dos
Afiliação:	WILSON JOSÉ OLIVEIRA DE SOUZA, Universidade Estadual Paulista "Júlio de Mesquita Filho"; DANILO EDUARDO ROZANE, Universidade Estadual Paulista "Júlio de Mesquita Filho"; HENRIQUE ANTUNES DE SOUZA, CPAMN; WILLIAM NATALE, UFC; PAULO ANDRÉ FERNANDES DOS SANTOS, Universidade Estadual Paulista "Júlio de Mesquita Filho".
Ano de publicação:	2018
Referência:	Revista Caatinga, Mossoró, v. 31, n. 4, p. 980-986, out./dez. 2018.
Conteúdo:	The study was conducted in irrigated commercial orchards of ?Paluma? and ?Pedro Sato? guavas, which were mapped with a Garmin GPS unit (Cx60). Sixty five sampling points were marked on a 21 x 21 m sampling grid. Gravimetric humidity and soil penetration resistance (SPR) were evaluated with the help of an automated penetrometer rod with a type 3 cone at a 45º angle (maximum SPR 15,100 kPa). Data with non-normal distribution were analyzed by geostatistics and interpolation by ordinary kriging. SPR values were higher where machine traffic occurs than on the lines where the crop is planted. There was spatial variability of the SPR among the layers evaluated, with the layer between 0.10-0.20 m, on the line of the machine traffic, presenting a higher SPR (>4000 kPa).
Thesagro:	Psidium Guajava Agricultura de Precisão Compactação do Solo Mecanização Agrícola
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CPAMN)