ABSTRACT One considerable concern arises from saline wastewater resulting from the production chain of the anticoagulant drug heparin. This waste contains a high concentration of sodium (Na, 2400 mg L-1), which can negatively influence soil structure. Simultaneously, it possesses a rich organic carbon content and nutrients that are beneficial to agricultural systems. This study sought to assess potential changes in physical and chemical properties, as well as soil mineralogy resulting from the application of varying proportions of industrial saline wastewater […]

ABSTRACT A double concentric ring is a widely used method for point measurement of water infiltration into the soil. These measurements are widely used to determine the impact of use and management on soil permeability to water infiltration. Two aspects of this technique that are interesting for research are the short duration of high infiltration rates observed after soil decompaction and the suspicion of lateral flow occurrence that overestimates infiltration. In this study, we evaluated the hypotheses that (i) agricultural […]

ABSTRACT Metrics are fundamental to quantify and classify the spatial dependence of soil and agricultural attributes. This study aimed to propose and validate metrics based on two distinct approaches, one additive, which considers the arithmetic mean of the vertical and horizontal components, and the other multiplicative, which considers the geometric mean of the vertical and horizontal components of the semivariogram. Furthermore, we intend to propose the classification of spatial dependence based on the categorization of these metrics. Finally, a function […]

ABSTRACT Sustainable agricultural systems, such as integrated crop-livestock systems under no-tillage, represent effective strategies for improving the soil microbiota, promoting nutrient cycling, and leading to gains in crop yield. Despite that, little is known about maintaining yield only through microbiological pathways for accessing nutrient reserves (without mineral fertilization) in established systems. This study aimed to evaluate whether the absence of mineral fertilization for two consecutive years and grazing activity affect soil microbial activity. An additional aim was to evaluate whether […]

ABSTRACT Exploring different fertilization strategies in an integrated crop-livestock system (ICLS) can enhance soil phosphorus (P) availability and improve soil quality, ultimately leading to higher yield. This study aimed to evaluate different fertilization strategies in ICLS and their effects on soil P fractions, soil quality and soybean grain yield in a tropical soil. Initiated in 2019, the experiment tested four fertilization strategies: 1) Conventional fertilization with P and K applied at soybean sowing (CF); 2) CF + N fertilization in […]

ABSTRACT Soils preserve numerous proxies for paleoenvironmental reconstruction, including phytoliths, which are highly resistant to weathering and can be preserved over long periods. This study investigates the environmental history and soil formation processes in the highlands of southern Brazil through the analysis of organic soils and phytolith records. Our research focuses on the Serra Geral formation, where soils are deeply influenced by environmental factors such as climate, vegetation, and human activities. Four soil profiles in the states of Santa Catarina […]

ABSTRACT Subtropical soils can have medium to high soil organic matter levels, which directly affects cation exchange capacity (CEC) and potassium (K) availability to plants. This generates the need to define K buffer capacity (KBC) values and K corrective rates to improve the fertilization recommendation system for these soils, ensuring high yields and reducing the likelihood of K losses in the environment. This study aimed to define KBC values and the K rates to be applied in corrective fertilization of […]

ABSTRACT Phosphorus in agriculture is an essential, limited, and strategic resource, and its sustainable management is a global challenge. Phosphorus (P) recovery as struvite (NH4MgPO4.6H2O) from manures and municipal and agro-industrial wastewaters has been considered one of the most sustainable technologies, based on the circular economy, to face challenges regarding P reserves and its use for conventional fertilizer production. Struvite is a slow-release P-fertilizer (5 % N, 12 % P, 10 % Mg), which could significantly reduce the Brazilian dependency […]

ABSTRACT Phosphorus (P) is one of the most limiting elements for plant nutrition in tropical and subtropical soils due to its high binding energy on the surface of iron and aluminum oxides and hydroxides. Flooded rice cultivation occurs in lowlands, influencing redox reactions and P dynamics. This study aimed to evaluate the forms of phosphorus and their lability after soil reoxidation subsequent to a period of flooding for irrigated rice cultivation following four seasons of cultivation with soybean-ryegrass and corn-white […]

ABSTRACT Dynamics of phosphorus (P) distribution, availability, and accumulation in reservoirs are influenced by land use and management. This study aimed to evaluate the total P (TP) content in soil aggregates formed under different vegetation cover types and agricultural crops, analyze the inorganic and organic forms of P with different degrees of lability, evaluate the percentage of P adsorbed (P ads), and, investigate the interactions between the soil aggregate P-fractions evaluated and their physical and chemical properties. Three different cultivated […]