2 results

Spatial variability of the properties of cohesive soils from eastern Maranhão, Brazil

José Maria do Amaral Resende, José Marques Júnior, Marcilio Vieira Martins Filho, Jussara Silva Dantas, Diego Silva Siqueira, Daniel De Bortoli Teixeira

01/Aug/2014

The national and international demand for maps of soil properties has increased. The aim of this study was to characterize cohesive soils and associate their variability of particle size, chemical properties, and color to different landforms in agricultural areas and native vegetation using geostatistical techniques. To set up the experiment, we selected three areas of soil consisting of an area planted to soybeans and, contiguous to it, another area with plant cover remaining from three types of cerrado (tropical savanna), […]

Soil color, phosphorus pools and phosphate adsorption in Latosols developed from basalt in the South of Brazil

J. A. Almeida, J. Torrent, V. Barrón

01/Dec/2003

Most of the intensely cultivated soils of South Brazil are Brown and Red Ferric Latosols developed from basalt. Typical profiles of these two classes have brown and red hues, respectively, but polychromatic profiles with brown hues in the surface horizons and reddish hues in the subsurface horizons (formerly denominated Brown/Reddish Latosols) also occur. Exact color parameters that separate Brown and Red Latosols are not yet defined in the Brazilian Soil Classification System. All these soils are clayey and have high […]