4 results

Winter cover crops effects on soil organic carbon and soil physical quality in a Typical Argiudoll under continuous soybean cropping

María Paz Salazar ORCID logo , Carlos Germán Soracco ORCID logo , Rafael Villarreal ORCID logo , Nicolás Guillermo Polich ORCID logo , Guido Lautaro Bellora ORCID logo , Matías Javier Turinetto ORCID logo , [...]

27/Nov/2020

ABSTRACT The massive adoption of no-tillage (NT), along with the simplification of the cropping sequences has led to physical and chemical degradation of soils. To recover degraded soils, cover crops have been proposed as an alternative to increase soil organic carbon (SOC) and to improve soil physical quality (SPQ). This study aimed (i) to determine the content of SOC and its physical and chemical fractions at different layers and positions, in a soil with a soybean crop under NT with […]

Visual Abstract

Predicting Runoff Risks by Digital Soil Mapping

Mayesse Aparecida da Silva, Marx Leandro Naves Silva, Phillip Ray Owens, Nilton Curi, Anna Hoffmann Oliveira, Bernardo Moreira Candido

17/Oct/2016

ABSTRACT Digital soil mapping (DSM) permits continuous mapping soil types and properties through raster formats considering variation within soil class, in contrast to the traditional mapping that only considers spatial variation of soils at the boundaries of delineated polygons. The objective of this study was to compare the performance of SoLIM (Soil Land Inference Model) for two sets of environmental variables on digital mapping of saturated hydraulic conductivity and solum depth (A + B horizons) and to apply the best […]

Physical quality of an Oxisol after different periods of management systems

Karina de Vares Rossetti, José Frederico Centurion, Eurico Lucas de Sousa Neto

01/Dec/2013

Management systems may lead to a loss of soil physical quality as a result of removal of the plant cover and excessive agricultural mechanization. The hypothesis of this study was that the soil aggregate stability, bulk density, macro- and microporosity, and the S index and saturated hydraulic conductivity may be used as indicators of the soil physical quality. The aim was to study the effects of different periods and managements on the physical attributes of a medium-textured Red Oxisol under […]

Soil physical attributes and citrus root system distribution as indicators of cohesive layers in soils of coastal table lands in the state of Bahia, Brazil

Marlete Bastos Santana, Luciano da Silva Souza, Laercio Duarte Souza, Luiz Eduardo Ferreira Fontes

01/Feb/2006

The physical characterization of two typical Coastal Tableland soils (Yellow Latosol-YL and Gray Argisol-GL) of the State of Bahia, Brazil, was carried out in 2001 and the citrus root system in such soils was evaluated in order to determine attributes that best identify the cohesive layer. The first four horizons in each soil were sampled for analysis of particle size distribution, soil bulk density, total porosity, macroporosity, microporosity, and saturated hydraulic conductivity. Soil resistance to penetration and critical humidity of […]