000			02776nab a2200313 i 4500
003			BR-BrBNA
005			20250318162436.0
008			250318b2020 bl.ar|pooa||| 00| 0 eng |
040			_aBR-BrBNA _beng
072			_aP32
072			_aP33
100			_aCipriano-Silva, Rafael
100			_aValladares, Gustavo Souza
100			_aAzevedo, Antônio Carlos de
100			_aAnjos, Lúcia Helena Cunha dos
100			_aPereira, Marcos Gervasio
100			_aPinheiro Junior, Carlos Roberto
245			_aAlluvial soil formation in the plains of northeastern Brazil
500			_aPublicação on-line; 41 ref.; 6 illus; 6 tables; Sumaries (En)
520			_a ABSTRACT: Soils in alluvial plains of the lower course of the Acaraú River, Ceará State, Brazil, are weakly developed and have a complex distribution in the landscape. This study reports the pedogenic characterization of such soils in an effort to understand their formation. Soil pits were opened in four representative sites, profile morphology was described, and soil samples were collected for chemical, physical, mineralogical, and micromorphological analyses. All profiles had weak pedogenic development, as inferred from their morphological characteristics, lack of B horizon, and high silt/clay ratio. Organic carbon and particle size distributions were heterogeneous in Fluvisol, Planosol, and Solonchak, in agreement with their sedimentary nature. Intrinsic characteristics of each profile indicated variations in pedogenic processes related to depositional conditions, which, in turn, were determined by the alluvial nature of sediments and water table dynamics. Consequently, Fluvisols at higher elevations showed reduced pedogenic development. In adjacent areas, Planosols showed pores filled with clay minerals and a texture gradient, indicative of past lessivage. Vertisol was identified in small depressions and exhibited intense pedoturbation and high sodium concentration in deep layers. Solonchak had a high degree of hydromorphism, high sodium concentration, and high electrical conductivity. The distinct pedogenesis of alluvial plain soils in Northeastern Brazil is evidenced by their morphological, chemical, and physical properties. Keywords: clay eluviation, pedogenesis, Inceptisol, pedoturbation.
650			_aGENÊSE DO SOLO
650			_aANÁLISE DO SOLO
650			_aPEDOLOGIA
650			_aCONDIÇÃO AMBIENTAL
773	0		_0808 _9345421 _dViçosa-MG Sociedade Brasileira de Ciência do Solo 1977 _o2024-5955 _tRevista Brasileira de Ciência do Solo (Brazil) _x0100-0683 _gv. 44 p. 1-18; (2020) _wBR2024004912
856			_uhttps://www.scielo.br/j/rbcs/a/3g7LQvRQ5kQPwrJL8sLvLgN/?format=pdf&lang=en
942			_cANA
999			_c330498 _d330498