André Carlos Auler

Universidade Federal do Paraná | UFPR · Departmet of Soil and Agricultural Engineering

It is generally accepted that liming ameliorates soil acidity. However, the method of lime application is thought by many to influence its effectiveness in acid soils. In this study, we wanted to assess the degree of effectiveness of surface-applied lime and lime incorporated into the soil on soil structural attributes and water retention of a Dyst...

The hierarchical organization of aggregates in soil is responsible for the presence of inter and intra-aggregate pores. This research aimed to investigate effects of soil surface liming, considering lime rates of 0, 10 and 15 t ha−1, on the intra-aggregate porous system of soil aggregates with equivalent diameters of 2–4 and 1–2 mm, from 0 to 10 (A...

The soil water retention curve is one of the most important properties used to predict the amount of water available to plants, pore size distribution and hydraulic conductivity, as well as knowledge for drainage and irrigation modeling. Depending on the method of measurement adopted, the water retention curve can involve the application of several...

PurposeIndustrial organic waste (IOW) from slaughter and processing of poultry and swine might be potential crop fertilizer. The use of IOW is known to alter the dynamics of soil organic carbon (SOC) and exchangeable cations. However, its effects on soil physical properties and processes are still unknown. The aim of this study was to evaluate the...

This study aimed to analyze how meteorological conditions such as temperature, humidity and rainfall can affect the spread of COVID-19 in five Brazilian (São Paulo, Rio de Janeiro, Brasília, Manaus and Fortaleza) cities. The cities selected were those with the largest number of confirmed cases considering data of April 18. Variables such as number...

Crop cultivation on sandy soils is susceptible to water stress. Therefore, we determined the physical-hydric attributes of a Latossolo Vermelho distrófico (Oxisol) in northwestern Paraná state, Brazil. Soil samples were collected at depth ranges of 0 to 0.2 m, 0.2 to 0.4 m, and 0.4 to 0.6 m. We measured clay, silt, sand, fine and coarse sand conten...

Grazing stimulates root and forage mass of perennial pastures, but few studies have addressed the effects of grazing on annual pastures which are often grown in short periods within integrated crop–livestock systems (ICLS). In these pastures, N fertilization is a common practice to increase forage mass, but its effects on root morphology are unclea...

Agroforestry systems bring together social, economic, and environmental services and can be alternatives for promoting development and sustainability in peasant agriculture. This study aimed to evaluate the soil physical and microbiological quality in a four-years peasant agroecological agroforestry intercropped with vegetables, located in Lapa, So...

Agroforestry systems bring together social, economic, and environmental services and can be an alternative for promoting development and sustainability in peasant agriculture. This study aimed to evaluate the soil quality in a peasant agroecological agroforestry intercropped with vegetables (South Brazil). Treatments included an agroforestry row (A...

The efficiency of the agricultural tractor can be increased with its assertive operational adequacy, ballasting being one of the fundamental factors for obtaining good performance levels, as it is closely related to energy and operational performance. Thus, the objective of this experiment was to evaluate the effect of hydraulic and solid ballast,...

Coinoculation of symbiotic N2-fixing rhizobia and plant growth-promoting Bacillus on legume seeds can increase crop productivity. We collected highly resolved data on coinoculation of rhizobia and bacilli on 11 grain legume crops: chickpea, common bean, cowpea, faba bean, groundnut, lentil, mung bean, pea, pigeon pea, soybean, and urad bean to veri...

This study aimed to identify the influence of soil and climate attributes on the elemental composition of yerba mate leaves based on 115 paired soil and leaf samples from Brazil, Argentina, and Paraguay. We collected the samples, gathered weather information from the study sites, and analyzed elemental leaf composition, soil chemical and granulomet...

The establishment of grain crops in Brazil is an important industrial process in the agricultural chain, requiring the correct deposition of granular fertilizer over the sowing furrow and more efficient, precise, and sustainable assessments in the operation, which can be achieved with the statistical process control. This study aimed to assess the...

Integrate crop-livestock systems has been an efficient alternative for food production contributing to environmental sustainability and soil conservation. The objective of this study was to characterize some micromorphological properties of a Humic Rhodic Hapludox in integrated production systems. For this, four soil tillage systems were evaluated:...

Manganese (Mn) toxicity is common in plants grown on very acid soils. However, some plants species that grow in this condition can take up high amounts of Mn and are referred to as hyperaccumulating species. In this study, we evaluated the capacity of Ilex paraguariensis to accumulate Mn and the effect of excessive concentrations on plant growth an...

This study aimed to develop a novel regression model for prescription of required nitrogen (N) for maize by combining spectral reflectance data from GreenSeeker sensor and agronomic efficiency. For this end, two field trials at two sites were carried out with maize (Zea mays L.) on Oxisols under no-till systems in Southern Brazil. For both experime...

Usage and management alter the dynamics of soil organic carbon (SOC). The aim of this study was to compare the CO2 emissions in a Typic Humudept under different uses, and to relate the effects of CO2 emissions to the organic carbon content of the soil. Soil samples were collected from the 0-0.05, 0.05-0.10, 0.10-0.15 and 0.15-0.20 m layers under th...

The aim of this study was to evaluate the effects of three methods of lime application (on the surface, via plowing and harrowing and via subsoiling and harrowing) in NT establishment from degraded pasture on the soil acidity dynamics and the availability of nutrients in soil with high acidity. For this, a field experiment was installed in a family...

The sustainability and efficiency of crop production are sometimes dependent on the adopted tillage system. In Brazil, conservation systems such as no-tillage (NT) have been adopted as an alternative to conventional tillage (CT) method. Conservation tillage systems usually tend to minimize soil losses, water runoff, preserve soil moisture and reduc...

The paraffin-coated method is a well-used approach to measure the soil bulk density (BD). BD is a physical property of great importance for studies of soil quality and health. Therefore, representative measurements of this property are highly valued. Resin and paraffin wax are utilized to coat soil samples; however, if these materials ingress into...

Liming can influence crop growth by altering pore geometry, pore size distribution and water retention characteristics in acid soils. The aim of this work is to determine liming effects on the soil structure based on analysis of water retention data using a cubic spline adjustment function. For that, the authors investigated the effect of three lim...

Purpose This study investigates the effects of surface liming on soil attenuation radiation properties. For this, measurements of soil chemical attributes (pH, organic carbon, H+Al, Al³⁺, Ca²⁺, and Mg²⁺) and attenuation radiation parameters (mass attenuation coefficient, μm, atomic and electronic cross sections, σa and σe, effective atomic number a...

The aims of this study were to evaluate the effects of the soil structural physical attributes on the water retention and to develop pedotransfer functions (PTFs) for the estimation of the soil water content (θ) at different matric potentials of a Dystrophic Red Latosol (Hapludox) under conventional tillage (CT) and no-tillage (NT) soil management...

ABSTRACT The intensification of soil use, as in integrated croplivestock system (ICLS), might promote soil structural degradation. A field method to evaluate the soil structural quality is the Visual Evaluation of Soil Structure (VESS). Studies on the application of this method to ICLS are few. This work aimed to evaluate the structural quality of...

Weed management between coffee inter rows plays a key role in minimizing soil degradation processes. Soil structure and, consequently, its pore size distribution (PSD), water retention (SWRC) and availability can be greatly affected by the weed control methods. In this study, the effect of six different weed control methods on pore size distributio...

Liming represents a management procedure that can affect the soil structure and its thermodynamic processes. In this context, the aims of this study were to assess (i) the effects of the surface and incorporated liming on the clay dispersion, soil water availability, and aeration capacity; (ii) the influence of soil chemical alterations in its phys...

RESUMO As avaliações da estrutura do solo são baseadas em amostras indeformadas, as quais podem ser alteradas durante a amos-tragem pelo equipamento de coleta. Entre os equipamentos utilizados para a coleta dessas amostras se destacam os que fazem uso de impacto. O objetivo com este trabalho foi desenvolver um equipamento para a coleta de amostras...

Weed management between coffee inter rows plays a key role in minimizing soil degradation processes. Soil structure and, consequently, its pore size distribution (PSD), water retention (SWRC) and availability can be greatly affected by the weed control methods. In this study, the effect of six different weed control methods on pore size distributio...

The soil bulk density (Ds) represents an important physical property of this porous media, which several times is used as soil quality index. There are different methods of Ds evaluation: volumetric ring (MVR), paraffin sealed (MPS) and gamma-ray attenuation. In experimental Physics classes, in the Hydrostatic and Hydrodynamics subjects, measuremen...

The quality seedlings production, which is dependent on the substrate used, are fundamental to the establishment of vegetable crops. The aim of this study was to evaluate the quality of lettuce seedlings in response to addition of vermiculite concentrations of substrates (pine bark, coconut fiber and peat) through the use of multivariate statistica...

As ações antrópicas, como os sistemas de uso e manejo do solo, promovem alterações em sua estrutura. Estas alterações podem ser restritivas ao desenvolvimento das plantas em manejos do solo que envolva sua mobilização, tendo seus efeitos negativos potencializados pela maior intensificação de uso. O objetivo deste trabalho foi avaliar os atributos f...

Os objetivos deste trabalho foram determinar as concentrações de P disponível extraído pelos métodos de Mehlich-1 (M1), Resina trocadora de íons (RTI) e Morgan Modificado (MM), após 36 meses de experimentação com aplicação de fosfatos em um sistema de integração lavoura-pecuária (SILP). Ainda, verificar qual método de extração proporciona melhor co...