32 results

Mechanized and irrigated coffee cultivation promotes physical subsurface constraints in Oxisols

Katherine Martinez Escobar ORCID logo , Laís Maria Rodrigues Silva ORCID logo , Keise Duarte Bacelar de Morais ORCID logo , Júlio César Lima Neves ORCID logo , Teogenes Senna de Oliveira ORCID logo

16/Jun/2025

ABSTRACT Soils of the Cerrados (Brazilian Savanna) are deep, well-structured, and well-drained, with flat to gently undulating terrain that favors mechanization for coffee cultivation. However, these soils are susceptible to compaction. This study aimed to assess the effect of mechanization on the physical characteristics of an Oxisol under irrigated coffee cultivation in the Alto Paranaíba-Minas Gerais State. We selected eight areas with different cultivars and years of Arabica coffee plantation, sampling five positions: right soil under the tree crown (RSC), […]

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Cover crops influence the physical hydric quality of a tropical sandy soil under no-tillage cotton cropping

Pedro Luan Ferreira da Silva ORCID logo , Cássio Antonio Tormena ORCID logo , Fábio Rafael Echer ORCID logo , Camila Pereira Cagna ORCID logo , Caroline Honorato Rocha ORCID logo , Renato Paiva de Lima ORCID logo

25/Nov/2024

ABSTRACT Reduced stability and structural resilience expose sandy soils to physical degradation under intensive production systems. This study aimed to evaluate the influence of different cover crops (CC) under no-tillage system (NTS) cotton cropping, grown either individually or in combination, on the soil physical quality (SPQ) of a sandy loam Oxisol (Latossolo) in southeastern Brazil. To quantify the effects of CC on soil physical quality indicators, an experiment in randomized blocks design was implemented with the treatments: CC1: single cultivation […]

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Physical Properties of Soil Structures Identified by the Profil Cultural under Two Soil Management Systems

Sônia de Fátima Schilickmann Macedo, Michel Grimaldi, Cristiane Conti Medina, José Edézio da Cunha, Maria de Fátima Guimarães, João Tavares

21/Jul/2017

ABSTRACT Soil structure plays an important role in water retention, infiltration capacity, porosity, and penetration resistance. The aim of this study was to evaluate the unsaturated hydraulic conductivity and physical properties of Oxisol soils (bulk density and macro-, micro-, and total porosity) in the structures identified using the profil cultural method in areas under two different management practices (perennial pasture and sugarcane). Three pits were dug in each plot to find out how homogeneous morphological structural units (HMSU) were organized […]

Reclamation of a Degraded Coal-Mining Area with Perennial Cover Crops

Eloy Antonio Pauletto, Lizete Stumpf, Luiz Fernando Spinelli Pinto, Tiago Stumpf da Silva, Jordano Vaz Ambus, Gabriel Furtado Garcia, [...]

12/Dec/2016

ABSTRACT: Studies addressing the potential of grass roots in improving the structural quality of constructed minesoils are not frequent in the literature, although they are essential for understanding the re-establishment of soil functions in the environment. The objective of this study was to quantify the root attributes of the species Urochloa humidicola, Panicum maximum, and Urochloa brizantha and relate them to the physical properties of a constructed minesoil in reclamation of an area degraded by coal mining. The study was […]

Compared performance of penetrometers and effect of soil water content on penetration resistance measurements

Edison Aparecido Mome Filho, Alvaro Pires da Silva, Getulio Coutinho Figueiredo, Fernando Henrique Setti Gimenes, André Cesar Vitti

01/Jun/2014

Modern agriculture techniques have a great impact on crops and soil quality, especially by the increased machinery traffic and weight. Several devices have been developed for determining soil properties in the field, aimed at managing compacted areas. Penetrometry is a widely used technique; however, there are several types of penetrometers, which have different action modes that can affect the soil resistance measurement. The objective of this study was to compare the functionality of two penetrometry methods (manual and automated mode) […]

Revisiting the S-index for soil physical quality and its use in Brazil

Quirijn de Jong van Lier

01/Feb/2014

The S-index was introduced in 2004 in a publication by A.R. Dexter. S was proposed as an indicator of soil physical quality. A critical value delimiting soils with rich and poor physical quality was proposed. At present, Brazil is world leader in citations of Dexter’s publication. In this publication the S-theory is mathematically revisited and extended. It is shown that S is mathematically correlated to bulk density and total porosity. As an absolute indicator, the value of S alone has […]

Spatial variability of the physical properties of a red yellow latosol under coffee

Karina Marie Kamimura, Gérson Rodrigues dos Santos, Marcelo Silva de Oliveira, Moacir de Souza Dias Junior, Paulo Tácito Gontijo Guimarães

01/Aug/2013

Knowledge about the variability of soil physical properties is fundamental for the monitoring of soil quality for being directly related to the sustainability of agricultural production. This study aimed to: a) assess and identify structures of spatial dependence by the construction of semi-variograms, for a Red-Yellow Latosol (Oxisol) under coffee, b) characterize the spatial distributions of the physical properties using ordinary kriging, and c) identify the layer with greatest physical impediment. The experiment was conducted on an experimental farm of […]

Spatial variability of soil penetration resistance of a vertisol under mango in perimeter of irrigated Mandacaru in Juazeiro, Bahia, Brazil

Daniela Siqueira Coelho, Jorge Wilson Cortez, Nelci Olszevski

01/Jun/2012

Soil resistance to penetration is frequently used as an indicator of soil compaction in management systems and can be directly related to crop growth and yields in general. It is important to use geostatistical methods in the assessment of soil resistance to penetration by considering the data heterogeneity of the area. The purpose of this study was to evaluate the spatial variability of soil penetration resistance (PR) in a Vertisol with mango trees. Data collection was performed in the Project […]

Modelling of soil penetration resistance for an oxisol under no-tillage

João Tavares Filho, Clarissa Tieme Matsuda Feltran, José Francirlei de Oliveira, Edinei de Almeida

01/Feb/2012

Soil penetration resistance is an important property that affects root growth and elongation and water movement in the soil. Since no-till systems tend to increase organic matter in the soil, the purpose of this study was to evaluate the efficiency with which soil penetration resistance is estimated using a proposed model based on moisture content, density and organic matter content in an Oxisol containing 665, 221 and 114 g kg-1 of clay, silt and sand respectively under annual no-till cropping, […]

Soil physical properties and sugarcane root growth in a red oxiso

José Euripides Baquero, Ricardo Ralisch, Cristiane de Conti Medina, João Tavares Filho, Maria de Fátima Guimarães

01/Feb/2012

Sugarcane, which involves the use of agricultural machinery in all crop stages, from soil preparation to harvest, is currently one of the most relevant crops for agribusiness in Brazil. The purpose of this study was to investigate soil physical properties and root growth in a eutroferric red Oxisol (Latossolo Vermelho eutroférrico) after different periods under sugarcane. The study was carried out in a cane plantation in Rolândia, Paraná State, where treatments consisted of a number of cuts (1, 3, 8, […]

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