Artículos de revistas
Spatial Variability Of Soil Surface Roughness Measured By Pin And Laser Reliefmeters [variabilidade Espacial Da Rugosidade Superficial Do Solo Medida Com Rugosímetros De Agulhas E Laser]
Registro en:
Bragantia. , v. 59, n. 2, p. 227 - 234, 2000.
68705
2-s2.0-0034583075
Autor
Bertolani F.C.
Gonzalez A.P.
Linares M.L.
Vquez E.V.
Garcia J.
Miranda V.
Institución
Resumen
The spatial variability of the soil surface roughness was analysed by instruments of different precision degrees in a grid of data points. For measuring the roughness it was used a laser reliefmeter before and after application of different amounts of rain (0 mm, 10 mm, 55 mm, 85 mm) in the laboratory. At field conditions (pasture and ploughed surface) a pin reliefmeter was used at four different dates. The results showed a great spatial dependence of soil surface roughness in both methods and for all treatments. The great variation of semivariogram parameters obtained with pin reliefmeter data for all different dates was due to the distribution and size of soil aggregates. This indicates how difficult it is to obtain a representative tridimensional microrelief model at field conditions. 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