20 results

Phosphorus buffer capacity of soils with medium clay and high organic matter content

Douglas Luiz Grando ORCID logo , Marcos de Lima Rodrigues ORCID logo , Cauan Guerra Martins ORCID logo , Lucas Peranzoni Deponti ORCID logo , Djalma Eugenio Schmitt ORCID logo , Gilmar Luiz Mumbach ORCID logo , [...]

16/Jun/2025

ABSTRACT Determining soil phosphorus (P) buffer capacity (PBC) is crucial for establishing optimal P fertilizer rates in corrective fertilization practices. However, in subtropical regions, changes in soil chemical and physical properties, such as soil organic matter (SOM) accumulation and texture modifications, can significantly impact PBC values, altering soil adsorption capacity. Consequently, P rates recommended by generalized guidelines for soil correction in these regions may be insufficient to achieve the critical P level in the soil. This study aimed to define […]

Visual Abstract

Potential acidity determination for soils with high soil organic matter

Douglas Luiz Grando ORCID logo , Lucas Peranzoni Deponti ORCID logo , Marcos de Lima Rodrigues ORCID logo , Cauan Guerra Martins ORCID logo , William Natale ORCID logo , Djalma Eugenio Schmitt ORCID logo , [...]

20/Mar/2025

ABSTRACT Lime applications are used in acid soils to correct pH and eliminate Al3+ toxicity in crops. The lime rates are determined based on the estimated soil potential acidity (H+Al), using soil incubations with calcium carbonate (CaCO3) for 180 days, being a time-consuming and laborious process. An alternative method with calcium hydroxide [Ca(OH)2] for 96 h incubation may efficiently estimate H+Al, but it needs further studies. Also, soils from specific regions in southern Brazil have high organic matter (SOM) contents […]

Visual Abstract

Soil carbon prediction in Marajó island wetlands

David Lukas de Arruda ORCID logo , João Carlos Ker ORCID logo , Gustavo Vieira Veloso ORCID logo , Renata Jordan Henriques ORCID logo , Elpídio Inácio Fernandes-Filho ORCID logo , Danilo de Lima Camêlo ORCID logo , [...]

27/Aug/2024

ABSTRACT Soil is an important carbon repository in terrestrial ecosystems, serving a fundamental role in the intricate cycling of this elemental component. Wetlands are crucial components of the global carbon cycle, playing a significant role in carbon sequestration due to their remarkable productivity and unique sedimentary structures. Our study focuses on the wetlands east of Marajó island, recognized as the largest fluvial-marine plain in South America. In this study, we applied a methodological framework to optimize SOC content prediction in […]

Visual Abstract

Microbial contribution to the carbon flux in the soil: A literature review

Lucas Carvalho Basilio Azevedo ORCID logo , Simone Cristina Braga Bertini ORCID logo , Adão Siqueira Ferreira ORCID logo , Nathalia Silva Rodovalho ORCID logo , Luiz Fernando Romanholo Ferreira ORCID logo , Ajay Kumar ORCID logo

25/Mar/2024

ABSTRACT Carbon flows into and out of the soil are important processes that contribute to controlling the global climate. The relationship between soil organisms and the climate is interdependent since the organisms that contribute to carbon and greenhouse gas fluxes are simultaneously affected by climate change and soil management. Temperature, soil moisture, pH, nutrient level, redox potential and organic matter quality are key elements affecting the microorganisms involved in organic carbon flows in the soil. Climate, topography (slope and position […]

Visual Abstract

Impacts of land-use changes on soil respiration in the semi-arid region of Brazil

José Romualdo de Sousa Lima ORCID logo , Rodolfo Marcondes Silva Souza ORCID logo , Eduardo Silva dos Santos ORCID logo , Eduardo Soares de Souza ORCID logo , Jéssica Emanuella da Silva Oliveira ORCID logo , Érika Valente de Medeiros ORCID logo , [...]

27/Nov/2020

ABSTRACT Soil respiration represents the largest flux of CO2 emission from terrestrial ecosystems, being affected by land-use changes and soil properties. There are few studies investigating the response of soil respiration to land-use changes in the Caatinga biome. This study aimed to measure soil respiration from Caatinga vegetation and degraded pasture, to verify the effect of land-use changes on soil respiration. Measurements of soil respiration were performed using the infrared gas analyzer method over nine months (in rainy and dry […]

Visual Abstract

Effects of Long-Term Fertilization Management Practices on Soil Microbial Carbon and Microbial Biomass in Paddy Soil at Various Stages of Rice Growth

Yilan Xu, Haiming Tang, Xiaoping Xiao, Weiyan Li, Chao Li, Geng Sun, [...]

20/Apr/2018

ABSTRACT Soil microbial biomass plays a significant role in soils, and it is often used as an early indicator of change in soil quality. Soil microbial biomass is affected by different fertilization management practices. Therefore, the impact of different long-term fertilization management practices on the soil organic carbon (SOC) content, soil microbial biomass carbon (SMBC), and soil microbial biomass nitrogen (SMBN), as well as the soil microbial quotient (SMQ) in the tilled layer (0.00-0.20 m) were studied in the present […]

Characterization of Organic Matter under Different Pedoenvironments in the Viruá National Park, in Northern Amazon

José Frutuoso do Vale, Steven Nicodem, Valdinar Ferreira Melo, Sandra Catia Pereira Uchôa, Diego Lima de Sousa Cruz

12/May/2016

ABSTRACT Soil organic matter (SOM) fractions result from a variety of environmental processes, which affect incorporation and production rates, decomposition, alteration, and/or mineralization of organic matter. The aim of this study was to characterize SOM under the environments of rain forest, wooded campinarana (grasslands), arboreal-shrubby campinarana, grassy-woody campinarana, and pioneer plants of the Viruá National Park, in the north of the Brazilian Amazon. After chemical and physical characterization and soil classification, total organic carbon (TOC), total N, microbial activity, organic […]

Changes in a Rhodic Hapludox under no-tillage and urban waste compost in the northwest of Rio Grande do Sul, Brazil

Moacir Tuzzin de Moraes, Vanderlei Rodrigues da Silva, Maurício Roberto Cherubin, Reimar Carlesso, Henrique Debiasi, Renato Levien

01/Aug/2014

The use of urban waste compost as nutrient source in agriculture has been a subject of investigation in Brazil and elsewhere, although the effects on soil physical and chemical properties and processes are still poorly known. The aim of this study was to evaluate the effect of application of urban waste compost and mineral fertilizer on soil aggregate stability and organic carbon and total nitrogen content of a Rhodic Hapludox under no-tillage in the northwestern region of Rio Grande do […]

The effects of land use and soil management on the physical properties of an Oxisol in Southeast Brazil

Getulio de Freitas Seben Junior, José Eduardo Corá, Rattan Lal

01/Aug/2014

Soils of the tropics are prone to a decrease in quality after conversion from native forest (FO) to a conventional tillage system (CT). However, the adoption of no-tillage (NT) and complex crop rotations may improve soil structural quality. Thus, the aim of this study was to evaluate the physical properties of an Oxisol under FO, CT, and three summer crop sequences in NT: continuous corn (NTcc), continuous soybean (NTcs), and a soybean/corn rotation (NTscr). Both NT and CT decreased soil […]

Physical quality of an Oxisol under an integrated crop-livestock-forest system in the Brazilian Cerrado

Eurico Lucas de Sousa Neto, Itamar Andrioli, Roberto Giolo de Almeida, Manuel Cláudio Mota Macedo, Rattan Lal

01/Apr/2014

Soil physical quality is an important factor for the sustainability of agricultural systems. Thus, the aim of this study was to evaluate soil physical properties and soil organic carbon in a Typic Acrudox under an integrated crop-livestock-forest system. The experiment was carried out in Mato Grosso do Sul, Brazil. Treatments consisted of seven systems: integrated crop-livestock-forest, with 357 trees ha-1 and pasture height of 30 cm (CLF357-30); integrated crop-livestock-forest with 357 trees ha-1 and pasture height of 45 cm (CLF357-45); […]

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