3296 results

Automatic measurement of surface runoff at the plot scale

Lucas Raimundo Rauber ORCID logo , Dalvan José Reinert ORCID logo , Paulo Ivonir Gubiani ORCID logo , Kelvin Salbego Nunes ORCID logo , Micael Stolben Mallman ORCID logo

10/Feb/2025

ABSTRACT Although the hydrological importance of water infiltration into the soil and surface runoff is well known, manual measurement of these processes, especially at the plot and hillslope scales, is laborious and requires a trained team. This study aimed to develop prototypes with the tipping bucket principle for the automatic monitoring of surface runoff at a plot scale (14.5 × 3 m). In total, 18 prototypes were built and installed in an experiment with different soil covers. Aspects of the […]

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 […]

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Immediate and residual effect of tobacco powder compost and of NPK on N2O emissions and on N use in a wheat/corn crop succession

Pâmela Oruoski ORCID logo , Celso Aita ORCID logo , Stefen Barbosa Pujol ORCID logo , Heitor Luís Santin Bazzo ORCID logo

04/Feb/2025

ABSTRACT Organic fertilization with tobacco powder compost produced via solid-state fermentation (SSF) is a recent practice that needs to be evaluated through research. This study aimed to evaluate the effect of two nitrogen sources – tobacco powder compost or mineral fertilizer (NPK) – and of compost doses on N use and loss in an immediate and residual way in a wheat/corn crop succession in a subtropical Argissolo. The wheat/corn crop succession was established after three successive fertilizer applications with different […]

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Saturated hydraulic conductivity and steady-state infiltration rate database for Brazilian soils

Marta Vasconcelos Ottoni ORCID logo , Wenceslau Geraldes Teixeira ORCID logo , Aline Mari Huf dos Reis ORCID logo , Letícia Guimarães Pimentel ORCID logo , Luciana Rodrigues Souza ORCID logo , Jackson Adriano Albuquerque ORCID logo , [...]

20/Jan/2025

ABSTRACT Soil saturated hydraulic conductivity (Ksat) and steady-state infiltration rate (SSIR) are essential and necessary soil properties for different geoscience applications. Values of these hydraulic properties for the Brazilian territory are difficult to access and are dispersed in research efforts carried out around the country. This study developed an easy-to-manipulate, freely accessible database of soil saturated hydraulic conductivity, comprising field and laboratory analyses, and steady-state infiltration rates for Brazilian soils. This database was named Ksat-SSIR-DB. One analysis of the Ksat-SSIR-DB […]

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Delineation of potential management zones for cowpea by factorial kriging and spatial Fuzzy C-Means of yield and soil chemical and texture properties

João Fernandes da Silva Júnior ORCID logo , Thiago Thomé da Silva ORCID logo , Devid Jackson da Silva Sousa ORCID logo , Rose Luiza Moraes Tavares ORCID logo , Benedito Dutra Luz de Souza ORCID logo , Daniel Pereira Pinheiro ORCID logo

14/Jan/2025

ABSTRACT In precision agriculture, accurate delineation of management zones and understanding spatial variability of soil properties and crop yields are critical for optimizing resource allocation and improving productivity. Spatial variability of different environmental factors (soil and plants) is evident in several studies. Associations between the texture and chemical properties of the soil and cowpea yield have been tested, but a large, unexplained variance of ranges between kriged maps is usually reported. This suggests that a deeper exploration into the soil […]

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Coconut residues increase light fraction of organic matter and water retention in semi-arid sandy soil under irrigated cultivation

Isnara Evelin Barbosa da Silva ORCID logo , Magnus Dall’Igna Deon ORCID logo , Davi José Silva ORCID logo , Francisco Alisson da Silva Xavier ORCID logo , Ana Paula Guimarães Santos ORCID logo , Diana Signor ORCID logo

16/Dec/2024

ABSTRACT Coconut palm cultivation is associated with the generation of a large amount of residues, mainly from coconut shells, and their utilization in agriculture can represent an opportunity in the context of circular economy and climate change. This study aimed to determine the effect of coconut shell deposition on carbon (C) stocks, organic matter quality, and soil water retention in coconut palm cultivation in the Brazilian semi-arid region. The study was conducted in a commercial coconut palm cultivation area in […]

Critical potassium concentrations for the initial cultivation of Cedrela fissilis Vell

Nonato Junior Ribeiro dos Santos ORCID logo , José Zilton Lopes Santos ORCID logo , Sulianne Idalior Paião Rosado ORCID logo , Tainah Manuela Benlolo Brabosa ORCID logo , Mylena Rêgo Panza ORCID logo , Marcelo Tavares Nunes ORCID logo , [...]

16/Dec/2024

ABSTRACT Providing nutrients in optimum quantities is essential for increasing the productivity of timber species. Despite this, we know little about the actual potassium (K) requirements of native Amazonian Forest species. This study aimed to determine the critical level of K deficiency and toxicity for the initial cultivation of cedar. We grew Cedrela fissilis seedlings in a nutrient solution under the effect of five concentrations of K (0, 1, 2, 5, and 8 mmol L-1) in a completely randomized design […]

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Effect of potassium rates and application methods in no-till on soil K availability and crop yield

Gustavo Pesini ORCID logo , Dayana Jéssica Eckert ORCID logo , Matheus Ferrari Menegat ORCID logo , Gustavo Frosi ORCID logo , João Pedro Moro Flores ORCID logo , Lucas Aquino Alves ORCID logo , [...]

16/Dec/2024

ABSTRACT The combination of potassium (K) fertilization with the adoption of no-tillage (NT) increases the concentration gradient of K in the soil, requiring subsurface layers to diagnose fertility. This study aimed to evaluate the effect of K rates applied in band or broadcast on the soil K availability and soybean and wheat yield. The study was established in 2019 on a Latossolo (Ferralsol) in the northwest of Rio Grande do Sul State, Brazil, under NT since 2002. Summer soybeans and […]

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Soil fauna diversity in integrated production systems in the Brazilian Cerrado

Smaiello Flores da Conceição Borges dos Santos ORCID logo , Henrique Antunes de Souza ORCID logo , Luís Alfredo Pinheiro Leal Nunes ORCID logo , Lucrécia Pacheco Batista ORCID logo , Michaelly Heidy Moraes Matos ORCID logo , Geania de Sousa Vera ORCID logo , [...]

12/Dec/2024

ABSTRACT Soil fauna is an important indicator of soil quality. This study aimed to evaluate soil fauna collected using pitfall traps and soil chemical and microbiological properties under different land uses in the Cerrado. The systems evaluated were soybean under 14-year no-till; soybean under 3-year no-till; eucalyptus rows; soybean grown between eucalyptus rows, and native Cerrado. Collected individuals were identified as classes, subclasses, order, or family classes. We evaluated the number of individuals trap-1 day-1, total richness, average richness, Shannon […]

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Use of biochar as a component of substrates in horticulture and forestry: A review

Luiz Henrique Natalli ORCID logo , Everton Hillig ORCID logo , Kátia Cylene Lombardi ORCID logo , Marcelo Godinho ORCID logo , Remigio Paradelo Nuñez ORCID logo

12/Dec/2024

ABSTRACT Plant production in nurseries, both in the forestry and horticultural sectors, has a large demand for substrates, making the use of natural resources such as peat high. The composition of substrates must not only have the necessary characteristics for good plant development, such as porosity, density, and water retention, but also look for sustainable and economical production. Biochar is a material derived from the processing of various organic residues which, due to its physical and chemical characteristics, presents great […]

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