53 results

Short-term effects of Urochloa intercropped with corn on the structure properties of a soil under no-tillage

João de Andrade Bonetti ORCID logo , Helio Henrique Soares Franco ORCID logo , Rachel Muylaert Locks Guimarães ORCID logo , Cássio Antonio Tormena ORCID logo

11/Jul/2025

ABSTRACT The reduced crop diversity under no-tillage increases soil compaction and reduces soil quality. This study aimed to investigate whether intercropping corn and Urochloa has significant short-term effects on soil physical quality, as assessed by Visual Evaluation of Soil Structure (VESS), and its correlations with physical properties. Soil physical quality was assessed after corn and Urochloa intercropping and corn without Urochloa. The VESS, penetration resistance, bulk density, air-filled porosity, air permeability, pore continuity index, and water storage capacity were determined […]

Visual Abstract

Mechanized harvesting of a Pinus taeda L. forest does not impair the physical properties of a Nitossolo Bruno

Jadiel Andognini ORCID logo , Jackson Adriano Albuquerque ORCID logo , Brayan Favarin de Oliveira ORCID logo

10/Feb/2025

ABSTRACT Santa Catarina State, in the South region of Brazil, has 713 thousand hectares of pine forests. Harvesting operations of this species can degrade the soil, especially when carried out on very wet soil. However, there is little information on the impact of pine harvesting on the physical properties of the soil in this region. This study aimed to evaluate the impact of Pinus taeda L. harvesting on the physical properties of a Nitossolo Bruno distrófico típico. Two areas were […]

Visual Abstract

Application of organic and mineral fertilizers increases carbon fractions in two classes of aggregates in an Integrated Crop-Livestock System

Gustavo Ferreira de Oliveira ORCID logo , Álvaro Luiz Mafra ORCID logo , Juliano Corulli Corrêa ORCID logo , Paulo Hentz ORCID logo , Maytê Cechetto ORCID logo

04/Apr/2023

ABSTRACT Application of organic fertilizers of animal origin can increase organic carbon in the soil and increase its content in macroaggregates. This study aimed to evaluate carbon contents and fractions in two classes of soil aggregates in response to the application of organic and mineral fertilizers in an integrated crop-livestock system. The experiment was established in Concórdia, Santa Catarina State, in a Nitossolo Vermelho Eutroférrico típico, (Rhodic Kandiudox according to the WRB system) (0.00-0.05, 0.05-0.10, and 0.10-0.20 m), in an […]

Aggregation rate as a function of soil organic matter in heavy clayey Ferralsols

Thadeu Rodrigues de Melo ORCID logo , Marcos Gervasio Pereira ORCID logo , Gabriel Danilo Shimizu ORCID logo , Graziela Moraes de Cesare Barbosa ORCID logo , João Tavares Filho ORCID logo

16/Sep/2022

ABSTRACT Heavy clayey Ferralsols are known for their high capacity to form water-stable macroaggregates. However, little is known about how different size classes of macroaggregates exchange mass with increasing organic matter content. This study aimed to characterize and detail aggregation dynamics with increasing organic matter content in these soils. Profiles of three heavy clayey Ferralsols were sampled to isolate the role of organic matter on the stability of aggregates. In this sampling scenario, a conceptual model was established to calculate […]

Visual Abstract

Parameters of infiltration models affected by the infiltration measurement technique and land-use

Gülay Karahan ORCID logo , Yakov Pachepsky ORCID logo

01/Jun/2022

ABSTRACT The measurement method (MM) and the land-use (LU) are two soil structure-related attributes that are available in infiltration experiments. This study aims to hypothesize that measurement technique and land-use might be good predictors of the performance of infiltration parameter values and models. The Soil Water Infiltration Global (SWIG), which includes about 5000 experiments worldwide and assembled in the Institute of Agrosphere in Jülich, Germany, was used. Except for the known properties such as texture, measurement method, and land-use, changes […]

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Use of nuclear techniques in soil science: A literature review of the Brazilian contribution

Luiz Fernando Pires ORCID logo , Fábio Augusto Meira Cássaro ORCID logo , Vladia Correchel ORCID logo

24/Nov/2021

ABSTRACT This review presents the basic research and some applications of the gamma-ray attenuation, neutron gauges, and 137Cs fallout techniques for studying soil physical processes and properties. The selected studies aimed to give the readers a general idea of the use of these nuclear techniques carried out by Brazilian researchers in the past decades. It is expected to assist future researchers by identifying knowledge gaps and opportunities for applying the methods presented here. Around 100 studies were selected for this […]

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Biogenic and physicogenic aggregates: formation pathways, assessment techniques, and influence on soil properties

Marcos Gervasio Pereira ORCID logo , Arcangelo Loss ORCID logo , Itaynara Batista ORCID logo , Thadeu Rodrigues de Melo ORCID logo , Eduardo Carvalho da Silva Neto ORCID logo , Luiz Alberto da Silva Rodrigues Pinto ORCID logo

24/Nov/2021

ABSTRACT: The soil particles can be gathered through physical and/or chemical processes in association with the biological activity, leading to the formation of aggregates. Soil aggregates has several functions in the soil, increasing macroporosity and water circulation – consequently reducing soil erosion and mechanical resistance to root growth, contributing to greater fixation of plants to the soil and absorption of water and nutrients, and protection of intra-aggregate organic matter. The aggregates were initially classified morphologically and in terms of their […]

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Physical, Chemical, and Microbiological Properties of Soil under Different Plant Covers in the Seridó Desertification Region in the Brazilian Semiarid

Adriana Ferreira Martins, Ignácio Hernan Salcedo, Flávio Pereira de Oliveira ORCID logo , Walter Esfrain Pereira

08/Mar/2019

ABSTRACT The Seridó Desertification Region is a result of inadequate management of the native Caatinga vegetation, which generated degraded areas with little or no capacity for plant production. The area has experienced a succession of different land uses, but little is known about the impact of these changes. The present study tested the hypothesis that the intense degradation of the Caatinga drastically decreased vegetal biomass production, which favored direct soil exposure and resulted in a lower abundance and diversity of […]

Aggregate Stability in Soil with Humic and Histic Horizons in a Toposequence under Araucaria Forest

Daniel Hanke, Deborah Pinheiro Dick

01/Apr/2017

ABSTRACT Aggregate stability is one of the most important factors in soil conservation and maintenance of soil environmental functions. The objective of this study was to investigate the aggregate stability mechanisms related to chemical composition of organic matter in soil profiles with humic and histic horizons in a toposequence under Araucaria moist forest in southern Brazil. The soils sampled were classified as Humic Hapludox (highest position), Fluvaquentic Humaquepts (lowest slope position), and Typic Haplosaprists (floodplain). The C and N contents […]

Physical Properties of a Hapludox after Three Decades under Different Soil Management Systems

Franciani Rodrigues da Silva, Jackson Adriano Albuquerque, André da Costa, Sandra Mara Vieira Fontoura, Cimélio Bayer and, Maria Izabel Warmling

12/Apr/2016

ABSTRACT Changes in soil physical properties due to different management systems occur slowly, and long-term studies are needed to assess soil quality. The objectives of this study were to evaluate the effects of soil management systems and liming methods on the physical properties of a Latossolo Bruno Alumínico típico (Hapludox). A long-term experiment that began in 1978 with conventional and no-tillage systems was assessed. In addition, different liming methods (no lime, incorporated lime, and lime on the soil surface) have […]

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