3296 results

Concentration and removal of macronutrients by soybean seeds over 45 years in Brazil: a meta-analysis

Dionata Filippi ORCID logo , Luiz Gustavo de Oliveira Denardin ORCID logo , Vítor Gabriel Ambrosini ORCID logo , Lucas Aquino Alves ORCID logo , João Pedro Moro Flores ORCID logo , Amanda Posselt Martins ORCID logo , [...]

05/Nov/2021

ABSTRACT A good soil fertility management for soybean production must consider the amount of nutrients that are exported by seeds. In recent decades, soybean yield has increased due to better crop management and genetic improvements, which may affect the amount of nutrients removed. Therefore, this study aimed (i) to analyze the relationship between the concentration of macronutrients in soybean seeds in Brazil with soybean yield and genotypes, and (ii) to update nutrient concentration values in soybean seeds for fertilizer recommendation […]

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Shaking settings to reduce the breakdown of Entisol fragile particles in texture analysis

Paulo Ivonir Gubiani ORCID logo , Thiago Assunsão de Almeida ORCID logo , Rodrigo Pivoto Mulazzani ORCID logo , Fabrício de Araújo Pedron ORCID logo , Luis Eduardo Akiyoshi Sanches Suzuki ORCID logo , Caroline Andrade Pereira ORCID logo

05/Nov/2021

ABSTRACT Finding the proper shaking setting to ensure total particle dispersion without altering the content of sand, silt and clay in soils composed of fragile particles such as saprolite fragments is still a research gap. This study aimed to identify the best shaking setting to optimize particle dispersion and minimize particle change in samples of Entisol (Neossolos). Samples were dispersed using an electric mixer at 12,000 rpm for 5, 15, 30 and 60 min, a horizontal shaker at 150 cycles […]

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Terracing increases soil available water to plants in no-tillage

Letiéri da Rosa Freitas ORCID logo , Paulo Ivonir Gubiani ORCID logo , Rodrigo Pivoto Mulazzani ORCID logo , Jean Paolo Gomes Minella ORCID logo , Ana Lúcia Londero ORCID logo

15/Oct/2021

ABSTRACT Several management practices can increase soil water storage capacity, but their effectiveness to minimize the adverse effects of drought depends on their potential to increase the soil available water to plants. Terracing is an effective option to increase soil water storage, but its effect on available water to plants in no-tillage system is still a knowledge gap. In this study, we monitored soil water content at eight layers down to 1.6 m in two zero-order paired catchments for 16 […]

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Assessing sediment yield and streamflow with SWAT model in a small sub-basin of the Cantareira System

Lucas Machado Pontes ORCID logo , Pedro Velloso Gomes Batista ORCID logo , Bárbara Pereira Christofaro Silva ORCID logo , Marcelo Ribeiro Viola ORCID logo , Humberto Ribeiro da Rocha ORCID logo , Marx Leandro Naves Silva ORCID logo

05/Oct/2021

ABSTRACT Hydro-sedimentological models might be useful tools for investigating the effectiveness of soil and water conservation practices. However, evaluating the usefulness of such models requires that predictions are tested against observational data and that uncertainty from model parameterization is addressed. Here we aimed to evaluate the capacity of the SWAT model to simulate monthly streamflow and sediment load in the Posses creek catchment (12 km2), Southeast Brazil. The SUFI-2 algorithm from SWAT-CUP was applied for calibration, testing, uncertainty, and sensitivity […]

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Soil chemical properties and wheat production in three Andisol with applications of materials from the cellulose industry

Juan Hirzel ORCID logo , Sebastián Meier ORCID logo , Arturo Morales ORCID logo , Pablo Undurraga ORCID logo , Francisco Salazar ORCID logo

05/Oct/2021

ABSTRACT Soil acidity is one of the main factors that reduces productivity in agricultural crops, and it is corrected with materials that neutralize acidification. Among soils affected by acidity are those of volcanic origin. At least 30 % of agricultural soils in Chile are of volcanic origin, and acidity correction practices must be constantly performed. This study aimed to evaluate the effectively of two materials that may neutralize soil acidification and increase yield production in Chilean volcanic soils. An experiment […]

Forms of lime application and use of phosphogypsum in low acid soil in southern Brazil: soybean-wheat yield and soil chemical properties

Marcos Renan Besen ORCID logo , Carolina Fedrigo Coneglian ORCID logo , Bruno Maia Abdo Rahmen Cassim ORCID logo , Wagner Deckij Kachinski ORCID logo , Tadeu Takeyoshi Inoue ORCID logo , Marcelo Augusto Batista ORCID logo

05/Oct/2021

ABSTRACT Brazil is currently the leading country in no-till (NT) farming, particularly on Ferralsols (Latossolos), the most abundant soil type. These soils are characterized by subsurface acidity that cannot be effectively corrected by surface application of additives. In this situation, the use of phosphogypsum can be advantageous. This study aimed to assess the residual effects of lime and phosphogypsum application on a clayey Ferralsol, and four soybean and two wheat yields in southern Brazil. The area has been cultivated under […]

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Geotechnical properties of some kaolinite-rich Brazilian Vertisols

Gustavo Magalhães Nunes Barbosa ORCID logo , Eduardo Antonio Gomes Marques ORCID logo , João Carlos Ker ORCID logo , Igor Rodrigues de Assis ORCID logo , Tony Jarbas Ferreira Cunha ORCID logo , Luciano da Silva Souza ORCID logo

05/Oct/2021

Abstract Vertisols presenting kaolinite codominance or prevalence were already reported in several countries worldwide. However, the literature has few studies focused on investigating the influence of this clay mineral in soil geotechnical behavior. This study aimed to carry out the characterization of Vertisols in Bahia State, Brazil, to understand the influence of physical, chemical, and mineralogical properties on their geotechnical behavior, as these soils have high natural fertility and have been used for agricultural activity, but with great risk due […]

Mycorrhizal inoculation and phosphorus fertilization show contrasts on native species of the Brazilian Atlantic Forest and Cerrado

Paulo Prates Júnior ORCID logo , Bruno Coutinho Moreira ORCID logo , Marliane de Cássia Soares da Silva ORCID logo , Nayron Vilela Diogo ORCID logo , José Maria Rodrigues da Luz ORCID logo , Thuany Cerqueira Jordão ORCID logo , [...]

09/Sep/2021

ABSTRACT Restoration of degraded sites by using native plants like Plathymenia reticulata Benth. and Melanoxylon brauna Schot. is advisable. However, seedlings of both species, when raised on commercial substrates, may present low survival. This study aimed to evaluate the growth of seedlings under inoculation with arbuscular mycorrhizal fungi (AMF). The seedlings were raised on soil sampled from near an adult plant of the same species. The P. reticulata and M. brauna seedlings were grown with or without the inoculation of […]

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Duromide increase NBPT efficiency in reducing ammonia volatilization loss from urea

Bruno Maia Abdo Rahmen Cassim ORCID logo , Wagner Deckij Kachinski ORCID logo , Marcos Renan Besen ORCID logo , Carolina Fedrigo Coneglian ORCID logo , Celso Rafael Macon ORCID logo , Gabriel Ferrari Paschoeto ORCID logo , [...]

09/Sep/2021

ABSTRACT Novel fertilizer stabilization technologies are needed to decrease ammonia (NH3-N) losses and increase nitrogen use efficiency. Duromide + NBPT is a new technology that combines two molecules, Duromide and NBPT, whose propose is to increase the efficiency of the urease inhibitor NBPT in reducing NH3-N loss from urea. Preliminary results showed that Duromide + NBPT can be a more effective product than just NBPT, particularly under low soil pH and high-temperature conditions. This study aimed to compare the effects […]

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Edaphic fauna and soil properties under different managements in areas impacted by natural disaster in a mountainous region

Sandra Santana de Lima ORCID logo , Adriana Maria de Aquino ORCID logo , Rafaela Martins da Silva ORCID logo , Priscila Silva Matos ORCID logo , Marcos Gervasio Pereira ORCID logo

24/Aug/2021

ABSTRACT Soil invertebrate fauna plays a major role in several environmental processes, and its absence can negatively impact ecosystem health. This study aimed to assess the recovery of epigeal and edaphic invertebrate faunal communities following an environmental disaster, with landslides, mudflow, and river floods, in sites under different management systems, the effects of cover crops on invertebrate fauna, and their relationship with soil physical and chemical properties in the mountainous region of Rio de Janeiro State, Brazil. The following sites […]

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