252 results

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/set/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 […]

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Load-bearing capacity and critical water content of the coffee plantation soil with management in full sun and shaded

Kasé Santos Lacerda ORCID logo , Rafaela Carvalho Vargas ORCID logo , Kleber Mariano Ribeiro ORCID logo , Moacir de Souza Dias Junior ORCID logo , Kátia Daniela Ribeiro ORCID logo , Dorotéo de Abreu ORCID logo

06/set/2022

ABSTRACT New management practices applied to coffee crops may influence the soil’s capacity to tolerate vertical stresses. This paper aimed to evaluate the influence of two coffee crop management systems on the soil load-bearing capacity and critical soil water content to agricultural machinery traffic. This study was performed in the experimental area of the Federal Institute of the Southeast of Minas Gerais – Rio Pomba college, in Rio Pomba city, Minas Gerais, Brazil. Dystrophic Red-Yellow Oxisol (Latossolo Vermelho-Amarelo distrófico) (LVA7) […]

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Soil macrofauna, mesofauna and microfauna and their relationship with soil quality in agricultural areas in northern Colombia: ecological implications

Yiseth Chamorro-Martínez ORCID logo , Ana Carolina Torregroza-Espinosa ORCID logo , María Inés Moreno Pallares ORCID logo , Diana Pinto Osorio ORCID logo , Amaira Corrales Paternina ORCID logo , Ana Echeverría-González ORCID logo

11/jul/2022

ABSTRACT Soil fauna is an essential component of the soil ecosystem for maintaining nutrient cycling and biological soil fertility. This study assessed the soil biodiversity (macrofauna, mesofauna, and microfauna) to define strategies for the sustainable management of tropical agricultural soils. The study was carried out in 200 agricultural production units in the Department of Sucre, in northern Colombia. Physicochemical properties (organic matter, nitrogen, phosphorus, and pH) were determined for each soil sample. The Berlesse-Tullgren method was used to determine the […]

Different managements in conventional sugarcane reform in sandy soils: effects on physical properties and soil organic carbon

Lucas Augusto de Assis Moraes ORCID logo , João Tavares Filho ORCID logo , Thadeu Rodrigues de Melo ORCID logo

07/jun/2022

ABSTRACT Sugarcane culture in Brazil has expanded the planting area to degraded pastures and sandy soils. Sugarcane field reform is carried out after five or more harvest cycles, with conventional tillage, followed by planting sugarcane, or growing soybeans or a cover crop. This study aimed to analyze the effects of these different managements in the conventional sugarcane reform on the physical properties and organic carbon in an Argissolo Vermelho distrófico arênico (sandy Ultisol), located at latitude 21° 13’ 40” south, […]

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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Microbial rhizosphere communities in response to chlorimuron-ethyl herbicide in soils under alfafa crop

Junnan Ding ORCID logo , Xin Li ORCID logo

25/abr/2022

ABSTRACT Biolog Eco technology was used to investigate the effects of different chemical herbicide application methods, such as pre-emergence after sowing and post-emergence (stem and leaf spraying), on the characteristics of carbon source utilization by microbial communities in alfalfa rhizosphere soil. The averages of well color development (AWCD) and microbial metabolism diversity indices of post-emergence herbicide spraying on stems and leaves were significantly lower than those of pre-emergence herbicide and without herbicide treatments. Furthermore, pre-emergence after sowing herbicide treatment did […]

Ultramafic soils and nickel phytomining opportunities: A review

Clístenes Williams Araújo do Nascimento ORCID logo , Luiz Henrique Vieira Lima ORCID logo , Ygor Jacques Agra Bezerra da Silva ORCID logo , Caroline Miranda Biondi ORCID logo

07/abr/2022

ABSTRACT Ultramafic soils are originated from ultramafic rocks such as peridotite and serpentinite and are highly enriched in metals (e.g., Ni, Cr, and Co) and depleted in plant nutrients (e.g., P, K, and Ca). Such characteristics make these soils unfavorable for agriculture and have raised environmental concerns on metal release to the environment. From another perspective, ultramafic soils host a diverse flora with higher endemism than surrounding non-ultramafic areas, which has provided scientists with an opportunity to investigate the evolutionary […]

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Model of inner-sphere adsorption of oxyanions in goethite – Why is phosphate adsorption more significant than that of sulfate?

Carla Gomes de Albuquerque ORCID logo , Fabiana Gavelaki ORCID logo , Vander Freitas Melo ORCID logo , Antônio Carlos Vargas Motta ORCID logo , Aldo José Gorgatti Zarbin ORCID logo , Caroline Mariano Ferreira ORCID logo

07/abr/2022

ABSTRACT Phosphorus availability in soils is low due to its strong retention by inner-sphere complexation on minerals in the clay fraction with pH-dependent charges, such as goethite. On the other hand, sulfur has greater availability because it is retained mainly by electrostatic attraction. We evaluated the intensities of the inner-sphere complexation of orthophosphate and sulfate (H2PO4-/HPO42- and SO42- – generically treated as PO4 and SO4) under different experimental conditions (pH, goethite purity, and contact times) on synthetic goethite samples to […]

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Using splines in the application of the instantaneous profile method for the hydrodynamic characterization of a tropical agricultural Vertisol

Benigno Rivera-Hernández ORCID logo , René Garruña-Hernández ORCID logo , Eugenio Carrillo-Ávila ORCID logo , Víctor Hugo Quej-Chi ORCID logo , José Luis Andrade ORCID logo , Rubén Humberto Andueza-Noh ORCID logo , [...]

06/abr/2022

ABSTRACT An important aspect in the study and understanding of the physical phenomena involved in water movement in the soil-plant system is the need to carry out the hydrodynamic characterization (HC) of non-saturated field soils. Studies of this type have been widely developed in soils of temperate climates, but they are infrequent in the tropics, hence there is a need for further research in tropical Vertisols under field conditions. Hydrodynamic characterization consists of finding the functional relationship between soil hydraulic […]

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A novel approach based on X-ray fluorescence and photon attenuation to the analysis of soils for forensic investigation

Luiz Fernando Pires ORCID logo , Luis Valério Prandel ORCID logo , Sérgio da Costa Saab ORCID logo , André Maurício Brinatti ORCID logo

06/abr/2022

ABSTRACT Use of soil in forensic science is related to its several chemical, physical, and biological properties associated with its capacity to adhere to different materials and surfaces. Forensic soil experts and police investigators have been using soil samples as an aid in criminal investigations. Soils can act as fingerprints because they present contrasting physical, chemical, biological, and mineralogical properties. However, depending on the analytical tools utilized to characterize the soil, differentiating the samples when they have similar properties might […]

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