Rodrigo Nogueira de Sousa

University of São Paulo | USP · Department of Soil Science (LSO)

Herbicides play a crucial role in weed control in various agricultural and non-agricultural settings. However, their behavior in the environment is complex and influenced by multiple factors. Understanding their fate and retention, transport, and transformation is essential for effective herbicide management and minimizing their impact on ecosystem...

This book is a comprehensive and up-to-date reference work that provides a detailed exploration of the key issues related to soil fertility, management, and conservation in agricultural settings. The book covers a range of topics including nutrient management, soil aggregation, soil organic matter, fertilizers, soil microbiology, and soil health. I...

“Agricultural Soils: Impacts on the Environment” is a comprehensive and timely guide to the latest research on the impacts of soil management practices on soil quality and health, as well as their effects on the wider environment. The book covers a range of topics including the use of biochar as a soil amendment, the environmental behavior of herbi...

Biodegradation studies of herbicides applied to the soil alone and in a mixture are required since herbicides are often used in combinations to control weeds. When herbicides are applied in mixtures, interactions may affect their environmental fate. Thus, the objective of this study was to evaluate the distribution of extractable residue, bound res...

Background: Phytoremediation is a technique used in soils contaminated with residual herbicides, such as tebuthiuron. However, the herbicide presence in the soil and plant matrices are not generally quantified. Objective: This study aimed to select plant species to evaluate the phytoremediation of 14C-tebuthiuron by showy rattlepod (Crotalaria spec...

Aims: We aimed to understand how eucalypt forests planted in highly weathered natural low fertile soils of the Brazilian Cerrado would beneft from the use of limestone (+L) and phosphogypsum (+G) applied banded or broadcast and incorporated or non-incorporated. Methods: The treatments applied here can be grouped into three, as follows: Group 1 – co...

We evaluated, by miscible displacement experiments, the dynamics of phosphorus (P) in a cohesive Oxisol amended with three alternative sources of P fertilizers: OM - organomineral, EST - struvite, and Thermo P – thermophosphate, as compared to the TSP - triple superphosphate). Breakthrough curves (BTCs) were obtained by 25 pore volumes (p) and fitt...

In fire-prone ecosystems such as the Brazilian Cerrado, pyrogenic C (PyC) can be a relevant contributor to soil C pools. However, the extent to which increasing additions of fresh plant litter can affect the relative contribution of PyC to soil organic matter (SOM) remains unclear. To address this question, we used a 12-month laboratory incubation...

Understanding the behavior in soil of herbicides applied PRE-emergence, such as tebuthiuron, is essential for more accurate weed management and less environmental impact. Thus, the objective of this research was to evaluate the effect of the physicochemical attributes of soils in 14C-tebuthiuron behavior. All studies were carried out by radiometric...

The environmental and agronomic benefits of adding biochar to soil have been widely explored worldwide. However, the mechanism of biochar–herbicide interaction still needs more studies for a better understanding. The biochar–herbicide interaction is very complex and varied as it directly depends on the physicochemical properties of both products an...

The studies regarding bioremediation technologies for environments contaminated by organic and inorganic pollutants is undoubtedly a promising branch for the coming years, supported by the search for the reduction of environmental damage caused by the chemical control of agricultural pests and the advocacy for a more sustainable agriculture has con...

Biochar is a solid material derived from different feedstocks that is added to the soil for various agronomic and environmental purposes, such as nutrient sources and CO 2 emission mitigators. In modern agriculture, the application of herbicides directly in the soil is common for pre-emergent weed control; however, biochars may interfere in the deg...

Glyphosate is the most widely used herbicide in the world for post-emergence weed control. Given the wide spectrum of control and agronomic efficacy of this herbicide associated with the increase in the cultivation of genetically modified crops resistant to glyphosate, it is very important to understand the behavior and fate of this chemical produc...

This study aimed to characterize the effect of amending soils with biochars derived from soybean residues, sugarcane bagasse, and wood chips on the sorption–desorption of indaziflam and indaziflam-triazinediamine (FDAT), indaziflam-triazine-indanone (ITI), and indaziflam-carboxylic acid (ICA) metabolites applied to soils from three Midwestern U.S....

The addition of carbonaceous material such as cow bonechar to the soil can affect the availability of applied pre-emergent herbicides such as indaziflam. However, how cow bonechar affects the bioavailability of indaziflam is not yet known. The aim of this study was to evaluate the effect of cow bonechar on herbicidal activity of indaziflam on weeds...

Herbicides are the most consumed pesticides worldwide, their interaction with soil and plants changes their availability in the soil solution, affecting soil retention (sorption-desorption) and weed absorption. Therefore, for there to be the efficiency of absorption by plant, it is necessary that the product applied in pre-emergence, be bioavailabl...

Quinclorac and tebuthiuron are residual herbicides that may remain in the soil longer than for the cropping season. The objective of this research was to evaluate the use of green manure plants to remediate soils treated with quinclorac and tebuthiuron. Soils were separately treated with 14 C-quinclorac and 14 C-tebuthiuron at 266.4 and 132 g ha À1...

Organic farming aims to produce a number of crops, without the use of synthetic chemicals (pesticides) or fertilizers, while enhancing soil composition and promoting biodiversity. This is a traditional, more permanent type of farming that relies on ecosystem services to maintain the integrity of the landscape while still producing sufficient yields...

The pesticide behavior in soils can be easily affected by biochar addition. However, studies on the effects of raw feedstock and biochar are scarce. The objective of this study was to evaluate the effect of amending soils from three Midwestern U.S. states, with biochar produced from soybean residues, sugarcane bagasse, and wood chips (grape) as wel...

The aim of this chapter is to show a general vision about the pesticides use in Brazil. Pesticides are chemical products that contribute to agricultural production processes, mainly large scale, as agents of chemical, physical and biological processes. The glyphosate is the most widely used pesticide in Brazil to vast area cultivated with genetical...

The expansion of short‐rotation eucalypt plantations in low soil organic matter (SOM) sandy soils may offers an alternative to improve soil C sequestration. The goal of this study was to estimate the changes in C stocks and emissions in different SOM fractions following conversion of the native Cerrado to pasture and then to eucalypt plantation. Th...

The objective of this study was to evaluate the sorption-desorption process and biodegradation of glyphosate in two tropical soils aged with biochar derived from eucalyptus. The biochar aging period was 30 d. There was little difference between the amounts of sorbed glyphosate in Ultisol (96.8, 96.8 and 96.4%) and Alfisol (97.1, 97.5 and 97.4%) soi...

Harvesting and reform in eucalyptus can lead to changes in soil organic matter (SOM). The objective of this work was to evaluate the changes in total organic C (TOC) and N (NT), C and N in humic acid (HA), fulvic acid (FH), light organic matter (LOM) and microbial biomass (MB), in Ultisol of eucalypt stands over one, two and four years of renovated...

Great attention has been given to global emissions of CO 2-C, once it is one of most concerning gases of the greenhouse effect. So, the role of forest ecosystem in the global carbon (C) balance is critical, since forests may sequester C in compartments with different timescales: i) Plant biomass and ii) Soil organic matter (SOM). Due to the worldwi...

Hexazinone, metribuzin, and quinclorac herbicides are used extensively throughout Brazil, and they can easily be leached to groundwater sources. Bone char (BC) has been shown to strongly sorb organic compounds and could be used as a sorbent to increase herbicide sorption and decrease leaching, although the better form of application is not known. T...

Socioeconomic and environmental characteristics in areas under Brazilian Balde Cheio Project (BCP) were evaluated. Questionnaires were applied to identify productive and socioeconomic characteristics of small farmers, and farmers’ perceptions on the implementation and operation of BCP. Soil and water samples were also taken. It seems that farmer’s...

The objective of this study was to investigate the effect of maize rhizosphere in the dynamics of soil organic matter (SOM) fractions (particulate organic matter—POM and mineral associated organic matter—MAOM) under different soil nitrogen (N) availability. The experiment was laid out as a factorial scheme 2 × 2: (i) without (-Plant) and with maize...

The aim of the present study was to evaluate the effect of eucalyptus plantations on total organic C (TOC) and total N (TN) stocks as well as the C and N in the fulvic acid (FA), humic acid (HA), humin (HU), light organic matter (LOM) and microbial biomass (MB) fractions in soils with different textures in the eastern part of the state of Rio Grand...

ABSTRACT The amount of harvest residues retained in Eucalyptus plantations strongly influences soil organic matter (SOM), but the efficiency of conversion to SOM may vary according to the type of residue. This study evaluated the recovery of C from Eucalyptus residue components - leaves, bark, branches, roots, and a mix of all residues - in differe...

In this paper, we report the results of studies on the solubility (water solubility trial) and the response by plants (greenhouse pot experiment using Zea mays) for four types of monoammonium phosphate fertilizers (Conventional MAP - MAP1, MAP coated with a natural organic acid - MAP2, MAP coated with a synthetic organic acid - MAP3, and MAP coated...

Tropical areas have prevalence of soils with low fertility, which makes the management of soil fertility a necessary practice to maintain a farming system economically and environmentally sustainable. The purpose of this chapter is to demonstrate the impor‐ tance of green manure and the use of crop residues as management for soil fertility. We high...