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Journal articles on the topic 'Red Latosol'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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Truber, Priscila Viviane, and Carolina Fernandes. "Arbuscular mycorrhizal fungal communities and soil aggregation as affected by cultivation of various crops during the sugarcane fallow period." Revista Brasileira de Ciência do Solo 38, no. 2 (2014): 415–22. http://dx.doi.org/10.1590/s0100-06832014000200006.

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Management systems involving crop rotation, ground cover species and reduced soil tillage can improve the soil physical and biological properties and reduce degradation. The primary purpose of this study was to assess the effect of various crops grown during the sugarcane fallow period on the production of glomalin and arbuscular mycorrhizal fungi in two Latosols, as well as their influence on soil aggregation. The experiment was conducted on an eutroferric Red Latosol with high-clay texture (680 g clay kg-1) and an acric Red Latosol with clayey texture (440 g kg-1 clay) in Jaboticabal (São Paulo State, Brazil). A randomized block design involving five blocks and four crops [soybean (S), soybean/fallow/soybean (SFS), soybean/millet/soybean (SMS) and soybean/sunn hemp/soybean (SHS)] was used to this end. Soil samples for analysis were collected in June 2011. No significant differences in total glomalin production were detected between the soils after the different crops. However, total external mycelium length was greater in the soils under SMS and SHS. Also, there were differences in easily extractable glomalin, total glomalin and aggregate stability, which were all greater in the eutroferric Red Latosol than in the acric Red Latosol. None of the cover crops planted in the fallow period of sugarcane improved aggregate stability in either Latosol.

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De Souza Padilha, Neriane, Gessí Ceccon, Valdecir Batista Alves, Antonio Luiz Neto Neto, Juslei Figueiredo da Silva, and Priscila Akemi Makino. "Soybean yield in succession to single and intercropping corn and brachiaria and submitted to differents irrigation intervals." Revista Engenharia na Agricultura - Reveng 29 (June 8, 2021): 66–80. http://dx.doi.org/10.13083/reveng.v29i1.11225.

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The experiment was performed at a non-acclimatized protected screened environment. The objective of the study was to evaluate the influence predecessor crops of single and intercropping corn and brachiaria on soybean yield submitted to irrigation intervals. The experimental design adopted was in a split split-plot randomized block design with four repetitions. Two soil classes (dystroferric Red Latosol and dystrophic Red Latosol) were evaluated in the plots, three intervals between irrigations were used during the soybean flowering (each one day, two days and three days) in the subplots and three types straw in the crops autumn-winter (single corn, single brachiaria, intercropping corn and brachiaria) in the sub-subplots. The two soybean plants cultivated in polyethylene pots containing 20 liters of dystroferric Red Latosol or dystrophic Red Latosol corresponded to each repetition, according to the treatment. The irrigation intervals of three and two days, in dystroferric Red Latosol and dystrophic Red Latosol, respectively, with single brachiaria at the previous crop provided greater number and weight of pods, higher number of grains and higher soybean yield. Irrigation every three days with single corn at the previous crop in dystroferric Red Latosol and dystrophic Red Latosol, resulted in the lower soybean performance.

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Souza, Zigomar Menezes de, José Marques Júnior, Gener Tadeu Pereira, and Carolina Maria Sánchez Sáenz. "Spatial variability of aggregate stability in latosols under sugarcane." Revista Brasileira de Ciência do Solo 33, no. 2 (2009): 245–53. http://dx.doi.org/10.1590/s0100-06832009000200002.

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The spatial variability of soils under a same management system is differentiated, as expressed in the properties. The spatial variability of aggregate stability of a eutrophic Red Latosol (ERL) and a dystrophic Red Latosol (DRL) under sugarcane was characterized. Samples were collected in a regular 10 m grid, in the layers 0.0-0.2 and 0.2-0.4 m, with 100 points per area, and the following properties were determined: geometric mean diameter (GMD) of aggregates, mean weight diameter (MWD) of aggregates, percent of aggregates in the > 2.0 mm class and organic matter (OM) content. The eutrophic Red Latosol (ERL) had a higher aggregate stability thn the dystrophic Red Latosol (DRL), which may be attributed to the higher clay and OM content and the gibbsitic mineralogy of this soil class. The differentiated evolution of the studied Oxisols explains the wider range and lower variation coefficient and variability, for all properties studied in the eutrophic Red Latosol.

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BRUSTOLIN, CARLOS, PEDRO MANUEL OLIVEIRA JANEIRO NEVES, RODOLFO BIANCO, and ORCIAL CEOLIN BORTOLOTTO. "TRATAMENTO DE SEMENTES DE MILHO PARA CONTROLAR Dichelops melacanthus EM DIFERENTES TIPOS DE SOLO." Revista Brasileira de Milho e Sorgo 16, no. 1 (2017): 13. http://dx.doi.org/10.18512/1980-6477/rbms.v16n1p13-21.

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RESUMO – O tratamento de sementes (TS) é a principal técnica empregada para o controle de Dichelops melacanthus (Hemiptera: Pentatomidae) em milho. Entretanto, acredita-se que a eficiência desta estratégia pode ser influenciada pelo tipo de solo no qual a lavoura é cultivada. Desse modo, este trabalho comparou a eficiência do TS dos inseticidas [tiametoxam e imidacloprido + tiodicarbe] em relação a duas testemunhas (com infestação e sem infestação) em quatro tipos de solo: Latossolo Vermelho distroférrico (LVdf); Latossolo Vermelho Amarelo arenoso (LVA arenoso); Latossolo Vermelho Amarelo argiloso (LVA argiloso) e Latossolo Vermelho distrófico (LVd). De forma geral, ambos os TS reduziram os danos da praga em todos os tipos de solo, quando comparados às plantas infestadas com D. melacanthus e sem TS. Por outro lado, o pior desempenho de ambos os TS foi observado no LVA arenoso, em que as plantas apresentaram menor comprimento de espiga e menor produtividade. Este estudo demonstrou que a eficiência do TS com tiametoxam, assim como imidacloprido + tiodicarbe, é afetada pelo tipo de solo. Desse modo, maiores cuidados devem ser tomados no cultivo de lavouras de milho em regiões com solos arenosos, e a adoção de estratégia complementar pode ser necessária.Palavras-chave: percevejo-barriga-verde, pragas do milho, pragas iniciais, neonicotinoides, adsorção de inseticidas.SEED CORN TREATMENT FOR Dichelops melacanthus CONTROL IN DIFFERENT SOIL TYPESABSTRACT - The seed treatment (ST) is the main tool used to control Dichelops melacanthus (Hemiptera: Pentatomidae) in maize fields. However, the soil type in which the plants are developed probably influences the efficiency of this strategy. In this sense, this study aimed to evaluate the performance of two insecticides (ST) [thiamethoxam (52.5 g.i.a); imidacloprid + thiodicarb (45 + 135) g.i.a] in relation to control (infested and non-infested plants) for D. melacanthus control in four types of soil: Dystroferric Red Latosol (DRL), sandy Red-Yellow Latosol (sandy RYL); clay Red-Yellow Latosol (clay RYL); and dystrophic Red Latosol (dystrophic RL). In general, ST reduced the pest damage in all soil types. In the other hand, the development plants in sandy RYL were hampered, showing a shorter length of ear and lower yield in both ST. This study showed that the ST performance with thiamethoxam and imidacloprid + thiodicarb is affected by the soil type. In this sense, maize fields cultivated in sand soils requires a careful management, and complementary strategies can be necessary.Keywords: green-belly stinkbug, maize pests, initial pests, neonicotinoides, insecticide adorsoption.

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de Almeida, Hilário Júnior, Victor Manuel Vergara Carmona, Maykom Ferreira Inocêncio, Antônio Eduardo Furtini Neto, Arthur Bernardes Cecílio Filho, and Munir Mauad. "Soil Type and Zinc Doses in Agronomic Biofortification of Lettuce Genotypes." Agronomy 10, no. 1 (2020): 124. http://dx.doi.org/10.3390/agronomy10010124.

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The incidence of many malnutrition-related diseases among the populations of developing countries is closely related to low dietary zinc (Zn) intakes. This study evaluated the potential of agronomic biofortification of lettuce genotypes with Zn in different soils. We evaluated the ability to biofortify three lettuce genotypes (‘Grand Rapids’, ‘Regina de Verão’, and ‘Delícia’) in two soils (Red-Yellow Latosol and Dystroferric Red Latosol) using five doses of Zn (0, 5, 10, 20, and 30 mg kg−1). At 55 days after sowing, the plants were harvested. There was an interaction among the soils, genotypes, and Zn doses. Regardless of the soil and genotype, the increase in Zn supply promoted a linear increase in shoot Zn concentration. However, shoot and root dry matter yields were differentially affected by Zn supply according to the genotype and soil type. Overall, the Red-Yellow Latosol provided a higher shoot Zn concentration but also caused greater growth damage, especially in ‘Regina de Verão’ and ‘Delícia’. ‘Grand Rapids’ was biofortified the most in Red-Yellow Latosol.

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Carducci, Carla Eloize, Geraldo César de Oliveira, Nilton Curi, Richard John Heck, and Diogo Francisco Rossoni. "Scaling of pores in 3D images of Latosols (Oxisols) with contrasting mineralogy under a conservation management system." Soil Research 52, no. 3 (2014): 231. http://dx.doi.org/10.1071/sr13238.

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The aim of this study was to evaluate the spatial and morphological configuration of the pore space in 3D images of Latosols with different mineralogy under a conservation tillage system in a coffee crop area. The visualisation and quantification of pore size distribution by data mining and spatial variability by semi-variogams were investigated in 3D images with 60-µm spatial resolution generated by X-ray CT scan (EVS/GE MS8x-130) in soil core samples collected at different depths of a kaolinitic Red-Yellow Latosol (RYL) and a gibbsitic Red Latosol (RL) from Brazil. Greater spatial variability occurred in the horizontal direction of the 3D image, a novel finding in this area of research. The pores detected were different between the Latosols studied, mainly at 0.20–0.34 m depth. The largest number (>4000) and volume (±30 mm3) of pores was found in the RL. The soil classes differed in 3D pore characteristics, and this aspect may be important in the characterisation of causes of pore variability. Sphericity was similar for both soils, with greater emphasis on pore classes with a diameter <0.4 mm, mainly at the 0.20–0.34 m depth. A higher percentage of spheroid pores occurred in RL (±25%), whereas the platy pores were more abundant in RYL (>15%).

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Vieira, Willyam de Lima, Erick Phelipe Amorim, Caio Corsato Correa, et al. "Effect of soil type on mean annual increment, wood anatomy and properties of 33-year-old Corymbia citriodora (Hook.), K. D. Hill, & L. A. S. Johnson." Research, Society and Development 10, no. 10 (2021): e558101019004. http://dx.doi.org/10.33448/rsd-v10i10.19004.

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This study aimed to determine the effects of physical, chemical and water-holding capacity of Quartzarenic Neosol, Red Latosol and Red Nitosol on tree growth, physicomechanical properties and anatomical features of wood from 33-year-old C. citriodora plantations. More clayey soils with higher water availability, such as Red Latosol and Red Nitosol, increased the mean annual increment and heartwood percentage. In more sandy soils, such as Quartzarenic Neosol, density increased, but the size and diameter of fibers and vessels decreased, and both fiber cell wall thickness and frequency of vessels and rays increased. Wood shrinkage and mechanical properties did not differ between soils. We observed a gradual increase in the anatomical, physical and mechanical characteristics in the pith-bark direction. The uniformity index showed that Quartzarenic Neosol and Red Latosol soils produced more homogeneous woods. We concluded that soil texture and water availability influenced tree growth, anatomical properties and wood density.

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Ramos, Sílvio Júnio, Valdemar Faquin, Fabrício William Ávila, Rose Myrian Alves Ferreira, and Josinaldo Lopes Araújo. "Biomass production, B accumulation and Ca/B ratio in Eucalyptus under various conditions of water availability and B doses." CERNE 19, no. 2 (2013): 289–95. http://dx.doi.org/10.1590/s0104-77602013000200013.

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Soils destined for forest crops are often limiting with respect to boron (B) and in several eucalyptus crops boron deficiency has been found to be a common occurrence. The objective of this study is to evaluate biomass production, B accumulation and Ca/B ratio in eucalyptus cultivated under different conditions of soil, water availability and doses of B. To that end, an experiment was conducted using a completely randomized design with a 5 x 2 x 2 factorial arrangement consisting of five doses of B (0.00, 0.25, 0.75, 2.25 and 6.25 mg kg-1), two types of soil, namely a Dark Red Latosol (LE) and a Red-Yellow Latosol (LV), and two water tension levels (-0.033 and -0.010 MPa), with four replicates. After plants were grown, determinations were made of Ca and B contents as well as Ca/B ratios in different portions of the plants. Accumulation of B was obtained from the ratio of its contents to dry biomass in each plant portion. It was found that, under natural conditions, both Dark Red Latosol and Red-Yellow Latosol fail to meet the nutritional requirements for B in eucalyptus, potentially being limiting to that species. Overall, soil moisture influenced dry biomass production and accumulation of B only in the case of the more sandy texture soil (Red-Yellow Latosol), denoting that this factor is conditional on soil texture. Ca/B ratio results showed that application of B to the soil without a suitable supply of Ca can lead to an imbalance between these nutrients, with possible implications for plant growth and nutrition.

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Franceschi, Mauricio, Sayonara A. do C. M. Arantes, Ednaldo A. de Andrade, Adriano M. da Rocha, Kelte R. Arantes, and Oscar M. Yamashita. "Liming on picloram leaching in dystrophic Red Yellow Latosol." Revista Brasileira de Engenharia Agrícola e Ambiental 23, no. 2 (2019): 103–8. http://dx.doi.org/10.1590/1807-1929/agriambi.v23n2p103-108.

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ABSTRACT The practice of liming may influence the leaching of herbicides in soils, especially those with weak acid character, such as picloram. The study on leaching, preserving soil structure, is an important factor when one intends to understand the dynamics of herbicides and environmental impacts. Thus, the effect of liming on picloram leaching in a dystrophic Red Yellow Latosol under field conditions was studied using a bioindicator plant. The experiment was set up in a completely randomized design (CRD), in split-plot scheme, with factorial in the plot. The factors of the plot corresponded to two soil conditions (presence and absence of liming) and 5 picloram concentrations (0; 384; 768; 1152; 1536 g ha-1), and the factor of the subplot was 5 soil depths (0-8, 8-16, 16-24, 24-32 and 32-40 cm), with four replicates. Pipes were introduced into the soil and, in part of the treatments, limestone was applied superficially. After ninety days, the different doses of picloram were applied on the surface of each pipe and these pipes were withdrawn after an accumulated rainfall of 128 mm, to perform the bioassay using cucumber plants (Cucumis sativus). Evaluations of plant development (phytotoxicity and shoot biomass) were carried out 21 days after sowing. It was concluded that picloram showed high leaching rate under all studied conditions and liming increased picloram leaching at doses lower than 768 g ha-1.

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Sandro da Rocha, Anderson, Maria Teresa de Nóbrega, and José Edézio da Cunha. "As unidades de paisagem, as vertentes características e os sistemas pedológicos na bacia hidrográfica do Paraná 3." Ateliê Geográfico 12, no. 1 (2018): 51–70. http://dx.doi.org/10.5216/ag.v12i1.44176.

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Resumo O presente trabalho tem como objetivo a identificação e detalhamento das vertentes características e dos sistemas pedológicos dominantes nas principais unidades de paisagem da Bacia Hidrográfica do Paraná 3, seguindo os preceitos teóricos e metodológicos da análise estrutural da cobertura pedológica e da análise integrada da paisagem. Foram desenvolvidos trabalhos de gabinete envolvendo a elaboração de cartas temáticas (geologia, clima, declividade, hipsometria, curvatura vertical e solos), trabalhos de campo (levantamento topográfico e pedológico) e laboratório (análises físicas e químicas de solos), que permitiram compreender a estrutura geoecológica e as relações morfopedológicas nos setores alto, médio e baixo da unidade hidrográfica em estudo. No alto setor as vertentes apresentam morfologias convexo-retilíneas e dois sistemas pedológicos dominantes, constituídos por Latossolo Vermelho - Neossolo Regolítico - Latossolo Vermelho e Latossolo Vermelho - Nitossolo Vermelho. No setor médio predominam as vertentes convexo-côncavo-retilíneas e o sistema pedológico formado pelo Neossolo Litólico - Nitossolo Vermelho. No setor baixo, às margens do Rio Paraná, dominam formas de vertentes retilíneas com sistema pedológico tipicamente composto pelo Latossolo Vermelho - Nitossolo Vermelho.  Palavras-chave: Solos; Morfopedologia; Unidades de paisagem  Abstract The present work has the objective of identifying and detailing the characteristic slopes and dominant pedological systems in the main landscape units of the Paraná watershed 3, following the theoretical and methodological precepts of the structural analysis of the pedological cover and integrated analysis of the landscape. Cabinet work was developed involving the elaboration of thematic maps (geology, climate, declivity, hypsometry, vertical curvature and soils), field work (topographic and pedological survey) and lab work (physical and chemical analyzes of soils), which permitted the geoecological structure and morphopedological relations in the upper, middle and lower sectors of the hydrographic unit under study. In the upper sector the slopes have convex-rectilinear morphologies and two dominant pedological systems, consisting of Red Latosol - Regolithic Neosol - Red Latosol and Red Latosol - Red Nitosol. In the middle sector, the convex-concave-rectilinear slopes predominate and pedological system formed by the Litholic Neosol - Red Nitosol. In the low sector, on the margins of the Paraná River, they dominate forms of straight slopes with pedological system typically composed by Red Latosol - Red Nitosol. Key words: Soils; Morphopedological; Landscape units  Resumen  Este estudio tiene como objetivo identificar y detallar las laderas características y los sistemas pedológicos dominantes en las principales unidades de paisaje de la cuenca del Paraná 3, siguiendo los principios teóricos y metodológicos de análisis estructural del suelo y análisis integrado paisaje. Se desarrollaron trabajos de gabinete que implica la preparación de mapas temáticos (geología, clima, declividad, hipsometría, curvatura vertical y suelo), trabajos de campo (levantamiento topográfico y pedológico) y de laboratorio (análisis físico y químico de los suelos), lo que nos permitió entender la estructura geoecológica y las relaciones morfopedologicas en los sectores de alta, media y baja de la cuenca hidrográfica en estudio. En las laderas del sector superior tienen morfologías convexa-rectilíneas y dos sistemas pedológicos dominantes compuestos por Ferralsol Rojo – Neosol Regolithic – Ferralsol Rojo y Ferralsol Rojo – Nitisol Rojo. En el sector del medio dominado por laderas convexo-cóncava-rectilíneas y el sistema de pedológico formado por Neosol Litholic – Nitisol Rojo. En el sector inferior, a orillas del río Paraná, las formas dominantes de laderas rectilíneas con sistema pedológico normalmente compuesto por Ferralsol Rojo – Nitisol Rojo. Palabras clave: Suelo; Morfopedologia; Unidades de paisaje

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Jeromini, Tatiane Sanches, Leandro Henrique de Sousa Mota, Silvana De Paula Quintão Scalon, Daiane Mugnol Dresch, and Lourenço Quintão Scalon. "EFFECTS OF SUBSTRATE AND WATER AVAILABILITY ON THE INITIAL GROWTH OF Alibertia edulis RICH." FLORESTA 49, no. 1 (2018): 089. http://dx.doi.org/10.5380/rf.v49i1.57122.

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Alibertia edulis Rich. is a native species of the Brazilian Cerrado and can be used for reforestation of degraded areas. In addition, it produces edible fruits. The objective of this study was to evaluate the effect of substrates and water levels on the emergence, initial growth, and quality of seedling of A. edulis. The substrates tested were: latosol (L), latosol + sand (L + S = 1:1), latosol + sand + chicken manure (L + S1 + CM = 1:1:0,5), latosol + sand + chicken manure (L + S2 + CM = 1:2:0,5), and latosol + commercial substrate (L + C = 1:1); and the water retention capacities (WRC) tested were: 25, 50, 75, and 100%. The experiment was carried through in a completely randomized design and subdivided into a plot scheme, in which the plots represented water availability and the subplots represented the substrates. Latosol + commercial substrate at 100% of WRC provided the best conditions for emergence, initial growth and formation of seedlings of A. edulis. Sowing in the substrate Dystroferric Red Latosol isolated at 25% of WRC should not be used for the formation of seedlings of this species.

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Lopes, Thais Cristina de Souza, Jeane Cruz Portela, Stefeson Bezerra de Melo, et al. "Characterization of Physical-Chemical and Structural Soil Attributes in the Semiarid Region of the Rio Grande do Norte State, Brazil." Journal of Agricultural Science 11, no. 3 (2019): 359. http://dx.doi.org/10.5539/jas.v11n3p359.

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The study of the soil characterization and the relation of its attributes allows a systematic proposal of the local particularities, leading to adequate practices for maintenance and/or preservation of its productive capacity. In this sense, the aim of this study was to evaluate the influence of structural attributes in association with physical and chemical soil classes, using the multivariate statistical techniques to differentiate environments. The research was carried out in the Moacir Lucena Project, located in the municipality of Apodi, RN, Brazil. Three representative environments were chosen as follows: Profile 1 (P1)-Red-yellow Latosol-Area in recovery (1AR), P2-Haplic Cambisol-Lake Area, (2AL) and P3-Eutrophic Yellow Latosol-Cashew Tree Area (3AC). The soil samples were collected in the horizons of the studied areas. Ten (10) samples were collected per horizons in volumetric rings and in soil blocks (aggregate analysis), which resulted in triplicates in the laboratory. Structural, physical and chemical attributes were evaluated. The data were analyzed using multivariate statistical techniques, with correlation matrix, clustering analysis and factorial analysis performed by the extraction of the factors into principal components. The use of clustering analysis allowed the formation of four groups for soil classes and attributes; the inorganic fractions were determinant for environmental differentiation, where the sand was discriminant for the Red-yellow Latosol and the Eutrophic Yellow Latosol, and the clay and silt for the Haplic Cambisol. Higher similarity was observed in the transition horizons of the Latosols Class. The physical and structural attributes were determinant in the dissimilarity for the Haplic Cambisol, reflecting in physical restrictions to the plant growth. The factor analysis revealed that the variables particle density (Dp), Ca2+, Mg2+, sum of bases (SB) and cation exchange capacity (CEC) for factor 1, followed by pH, P, K+, total Sand, Clay and soil density (Ds) for factor 2 are important soil attributes to distinguish the studied environments.

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ROSSETTI, KARINA DE VARES, and JOSÉ FREDERICO CENTURION. "USE OF S-INDEX AS A STRUCTURAL QUALITY INDICATOR FOR COMPACTED LATOSOLS CULTIVATED WITH MAIZE." Revista Caatinga 31, no. 2 (2018): 455–65. http://dx.doi.org/10.1590/1983-21252018v31n222rc.

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ABSTRACT One way to prevent soil degradation is to monitor its structural quality through physical attributes and indicators. Thus, the objective of this work was to identify parameters that can be used together with the S-index to assess the soil structural quality of Latosols-Distrophic Red Latosol (DRL) and Eutroferric Red Latosol (ERL)-cultivated with maize after traffic-induced compaction by agricultural machinery. The experiment was conducted in a randomized block design in split-plots, with five treatments and four replications for each soil class. The treatments were: T0 = conventional tillage without additional compaction; T1, T2 and T3 = one pass of a 4, 7 and 10-Mg tractor, respectively; T4 = three passes of a 10-Mg tractor. The water retention curve, density, porosity and S-index of the soil layers 0-0.1, 0.1-0.2 and 0.2-0.3 m were evaluated. The DRL presented similar S-index (0.035 to 0.037) in the T0, T1 and T2, and these S-index were connected to soil macroporosity. Most S-index of the ERL were above 0.035, except for T4 due to its higher soil density. The S-index can be used as a complementary parameter for maize height and soil macroporosity to evaluate the structural quality of DRL.

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Souto Filho, Sebastião N., Marlene C. Alves, Carlos M. Monreal, and Carolina dos S. B. Bonini. "Nanoparticles and nanostructure morphology of a Red Latosol in rehabilitation." Revista Brasileira de Engenharia Agrícola e Ambiental 21, no. 8 (2017): 530–36. http://dx.doi.org/10.1590/1807-1929/agriambi.v21n8p530-536.

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ABSTRACT In the process of rehabilitation of a soil, two points are fundamental: to define optimal interferences to accelerate the rehabilitation process and the most appropriate indicators to diagnose its quality. Therefore, this study aimed to investigate the nanoparticle and nanostructure morphology of a Red Latosol in rehabilitation for eight years. The soil under rehabilitation process was compared with its natural state and degraded. In the topsoil, nanoparticles (ø < 100 nm) and fine clay (ø < 200 nm) were quantified and the nanostructures morphology was studied using images obtained by transmission electron microscopy. Soil porosity, bulk density and carbon, nitrogen and hydrogen contents were analyzed. It was found that the nanoparticles and nanostructure morphology were good soil quality indicators; the physical and chemical attributes were not sensitive to detect alterations between the conditions of degraded soil and soil rehabilitated for eight years; in the class of particles with diameter smaller than 200 nm, for the studied Red Latosol, the visualization of nanostructures is more effective.

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Souza, M. D. de, L. H. Basssoi, O. O. S. Bacchi, et al. "Atrazine movement in a dark red latosol of the tropics." Scientia Agricola 54, spe (1997): 116–20. http://dx.doi.org/10.1590/s0103-90161997000300013.

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Atrazine displacement was studied in a soil profile as a function of water movement and time after herbicide application, taking into account possible influence of preferential flow on leaching. The experiment consisted of two 7 x 7m plots of a dark red latosol (Kanduidalfic Eutrudox), located at Piracicaba, SP, Brazil (22º 43'S and 47º 25'W), 250km inside continent, at an altitude of 580m. One plot was previously treated with 1,000 kg/ha of lime, in order to increase base saturation to 88%, and 500kg/ha of gypsum. Each plot was instrumented with tensiometers, neutron probe access tubes and soil solution extractors, in order to monitor water and atrazine flows. Atrazine was applied at the high rate of 6 kg/ha of active principle. Results showed intensive leaching of atrazine in the whole soil profile, up to the instrumented depth of 150cm, already ate the first sampling, seven days after herbicide application. The limed plot showed much higher atrazine leaching losses than the other plot. The atrazine adsorption capacity of the soil is very low, its maximum value being of the order of 10%, for the 0-15cm surface layer.

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Guareschi, Roni Fernandes, Marcos Gervasio Pereira, and Adriano Perin. "Oxidizable carbon fractions in Red Latosol under different management systems." Revista Ciência Agronômica 44, no. 2 (2013): 242–50. http://dx.doi.org/10.1590/s1806-66902013000200005.

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Aguilar, Ariel Santivañez, Henrique Vasque, Antonio Ismael Inácio Cardoso, et al. "Beet production using vermiculite incorporated with Dystrophic Red Latosol (Oxisol)." Research, Society and Development 10, no. 1 (2021): e26810111157. http://dx.doi.org/10.33448/rsd-v10i1.11157.

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Vermiculite is an expansive material that can be used for crop production. However, information about the use of vermiculite in vegetable production is scarce. Thus, this study's objective was to evaluate the effects of vermiculite levels incorporated into the soil (Red Latosol Dystrophic) for beet (Beta vulgaris L.) crop production. The experiment was performed during spring using the beet cultivar 'Early Wonder Tall Top' and 0, 2, 4, 6, 8, and 10 t∙ha-1 of vermiculite incorporated into the soil before seedling planting. The increase of the vermiculite doses caused a linear decrease of the fresh root and leaf weight. The yield reductions were due to the great water holding capacity of the vermiculite and the consequent high incidence of cercosporiosis (Cercospora beticola Saac).

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Marcatto, Francieli Sant'ana, and Hélio Silveira. "Relação entre as propriedades físico-hídricas dos solos e os tipos de uso da terra como subsídio ao manejo e conservação do solo e da água na bacia hidrográfica do rio Pirapó-PR ( Relation between the soil’s hydro-physical attributes and the land use...)." Revista Brasileira de Geografia Física 9, no. 6 (2016): 1769. http://dx.doi.org/10.26848/rbgf.v9.6.p1769-1783.

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Os Latossolos e Nitossolos da bacia hidrográfica do Pirapó apresentam reduzida suscetibilidade natural à ocorrência de processos erosivos, entretanto, o manejo inadequado tem promovido a sua degradação, impondo condições favoráveis a ação dos agentes de erosão. Diante disso, esse trabalho tem por objetivo estudar os Latossolos Vermelhos e Nitossolos Vermelhos de textura argilosa na bacia hidrográfica do Pirapó, apontando os efeitos das diferentes formas de uso e ocupação no comportamento físico e hídrico dos solos. Foram realizadas análises físicas de densidade do solo, porosidade total, macroporosidade, microporosidade, granulometria e estabilidade de agregados; análises hídricas de velocidade de infiltração e condutividade hidráulica e a análise química de carbono orgânico. Os resultados indicaram que os Latossolos e Nitossolos cultivados com culturas de grãos mostraram-se mais sensíveis às alterações impostas pelo tipo de uso, com alteração das suas propriedades físico-hídricas, sendo necessário buscar o correto manejo do solo garantindo a manutenção da qualidade da água e a sustentabilidade da bacia hidrográfica. A B S T R A C T The Latosol and Nitosol in the Pirapó drainage basin present little natural susceptibility to erosive processes, however, inadequate management has been promoting its degradation and creating conditions favorable to the action of the agents of erosion. In face of this, this works objective is studying the Red Latososl and Red Nitosols of clayey texture in the Pirapó drainage basin, pointing the effects of the different forms of use and occupation in the hydro-physical behavior of these soils. Physical analysis of soil density, total porosity, macroporosity, microporosity, granulometry and aggregate stability were conducted, along with water analysis of infiltration rate and hydraulic conductivity, plus a chemical analysis of organic carbon. The results indicate the Latosols and Nitosols under grain crops are more sensitive to the changes caused by the type of use, with alteration of is hydro-physical attributes, making the search for the correct soil management necessary for maintenance of the water quality and sustainability of the drainage basin. Keywords: hydro-physical proprieties, land use, 4B landscape compartment, Latosol and Nitosol.

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Silva, Roniram Pereira da, and Carolina Fernandes. "Soil uses during the sugarcane fallow period: influence on soil chemical and physical properties and on sugarcane productivity." Revista Brasileira de Ciência do Solo 38, no. 2 (2014): 575–84. http://dx.doi.org/10.1590/s0100-06832014000200022.

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The planting of diversified crops during the sugarcane fallow period can improve the chemical and physical properties and increase the production potential of the soil for the next sugarcane cycle. The primary purpose of this study was to assess the influence of various soil uses during the sugarcane fallow period on soil chemical and physical properties and productivity after the first sugarcane harvest. The experiment was conducted in two areas located in Jaboticabal, São Paulo State, Brazil (21º 14' 05'' S, 48º 17' 09'' W) with two different soil types, namely: an eutroferric Red Latosol (RLe) with high-clay texture (clay content = 680 g kg-1) and an acric Red Latosol (RLa) with clayey texture (clay content = 440 g kg-1). A randomized block design with five replications and four treatments (crop sequences) was used. The crop sequences during the sugarcane fallow period were soybean/millet/soybean, soybean/sunn hemp/soybean, soybean/fallow/soybean, and soybean. Soil use was found not to affect chemical properties and sugarcane productivity of RLe or RLa. The soybean/millet/soybean sequence improved aggregation in the acric Latosol.

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Vieira, Francisco Cleber Sousa, and Ely Nahas. "MICROBIAL COUNTS OF DARK RED LATOSOL SAMPLES STORED AT DIFFERENT TEMPERATURES." Revista de Microbiologia 29, no. 3 (1998): 159–63. http://dx.doi.org/10.1590/s0001-37141998000300001.

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The number of colony forming units (CFU) of different groups of bacteria and fungi in samples stored at temperatures of 5 to -12oC for 0-32 weeks was evaluated. The number of CFU obtained after the different periods of storage of red latossol soil was compared with the number of colonies obtained immediately after removal of soil samples (time zero). The number of total bacteria and actinomycetes in the samples remained practically unchanged throughout the storage period. The number of Gram-negative bacteria decreased by as much as 69% compared to control, while the number of Bacillus spp and of fungi increased 1.9 to 4.9 times starting from the 12th week in samples stored at 5oC. Except for the variations observed in fungal counts, the remaining groups of bacteria practically showed the same variation in number of colonies in soil samples stored at 5oC and -12oC.

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Vieira, Francisco Cleber Sousa, and Ely Nahas. "MICROBIAL ACTIVITY OF DARK RED LATOSOL SAMPLES STORED AT DIFFERENT TEMPERATURES." Revista de Microbiologia 29, no. 3 (1998): 164–66. http://dx.doi.org/10.1590/s0001-37141998000300002.

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The enzymatic activity of soil samples stored at temperatures of 5 to -12oC and at room temperature for 0-32 weeks was determined. While alkaline phosphatase and dehydrogenase activity was decreased compared to control in samples stored at low temperatures, acid phosphatase activity showed no significant change.

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Vitor, Marques Vidal, Antonio Loureiro Soares Frederico, Batista Teixeira Marconi, et al. "Cotton growth in response to water supply in red Latosol cerrado." African Journal of Agricultural Research 13, no. 10 (2018): 452–59. http://dx.doi.org/10.5897/ajar2016.11969.

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Filho, Fernando Rodrigues Cabral, Fernando Nobre Cunha, Nelmício Furtado da Silva, Marconi Batista Teixeira, Leonardo Nazário Silva dos Santos, and Gustavo da Silva Vieira. "WATER INFILTRATION RATE IN DISTROFERRIC RED LATOSOL UNDER DIFFERENT CROPPING SYSTEMS." Revista Brasileira de Agricultura Irrigada 11, no. 3 (2017): 1371–81. http://dx.doi.org/10.7127/rbai.v11n300555.

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Papini, S., and M. M. Andréa. "Enhanced degradation of metalaxyl in Gley Humic and Dark Red Latosol." Revista Brasileira de Ciência do Solo 24, no. 2 (2000): 469–74. http://dx.doi.org/10.1590/s0100-06832000000200023.

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Enhanced degradation of the fungicide metalaxyl was investigated in two soils: a gley humic (GH) and a Dark Red Latosol (LE), collected at sites never exposed to the fungicide. The soil samples were treated with successive applications of metalaxyl as a commercial formulation and 14C-metalaxyl in laboratory. Metalaxyl biodegradation was analyzed during 63 days by means of radiometric techniques to verify biomineralization and degradation product formation from the applied 14C-metalaxyl. Although biomineralization (maximum of 14 and 8% in the GH and LE soils, respectively), and partial degradation (about 32 and 48%, respectively) were detected in both soils, enhanced degradation was verified only in the GH soil. Results proved that metalaxyl behaves differently in soils.

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Tavares Filho, João, Graziela Moraes de Cesare Barbosa, and Adriana Aparecida Ribon. "Physical properties of dystrophic Red Latosol (Oxisol) under different agricultural uses." Revista Brasileira de Ciência do Solo 34, no. 3 (2010): 925–33. http://dx.doi.org/10.1590/s0100-06832010000300034.

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Obtaining information about soil properties under different agricultural uses to plan soil management is very important with a view to sustainability in the different agricultural systems. The aim of this study was to evaluate changes in certain indicators of the physical quality of a dystrophic Red Latosol (Oxisol) under different agricultural uses. The study was conducted in an agricultural area located in northern Paraná State. Dystrophic Red Latosol samples were taken from four sites featuring different types of land use typical of the region: pasture of Brachiaria decumbens (P); sugarcane (CN); annual crops under no-tillage (CAPD); and native forest (permanent conservation area) (control (C)). For each land use, 20 completely randomized, disturbed and undisturbed soil samples were collected from the 0-20 cm soil layer, to determine soil texture, volume of water-dispersible clay, soil flocculation (FD), particle density, quantity of organic matter (OM), soil bulk density (Ds), soil macroporosity (Ma) and microporosity (Mi), total soil porosity (TSP), mean geometric diameter of soil aggregates (MGD), and penetration resistance (PR). The results showed differences in OM, FD, MGD, Ds, PR, and Ma between the control (soil under forest) and the areas used for agriculture (P, CN and CAPD). The soils of the lowest physical quality were those used for CN and CAPD, although only the former presented a Ma level very close to that representing unfavorable conditions for plant growth. For the purposes of this study, the physical properties studied were found to perform well as indicators of soil quality.

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Andrade, S. P., S. A. C. M. Arantes, E. A. Andrade, C. S. Pereira, and M. Franceschi. "Leaching of 2,4-d and atrazine herbicides in red-yellow latosol." Scientific Electronic Archives 13, no. 8 (2020): 1. http://dx.doi.org/10.36560/13820201185.

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The intensive use of herbicides has increased the possibility of environmental contamination and the accumulation of pesticide residues in soil and water. This work aimed to evaluate the leaching potential of 2,4-D and atrazine herbicides in red yellow Latosol with a clayey texture. The experimental design was entirely randomized, in factorial 5x3 (five doses of each herbicide for three soil depths). The doses used were 1.25, 2.50, 6.25 and 12.50 L ha-1 for the 2.4-D herbicide and 2.25, 4.50, 11.25 and 22.50 L ha-1 for the atrazine herbicide (plus absolute witnesses). The herbicides were applied in buried pvc tubes to the soil and after accumulated rainfall of 87 mm, cucumber was grown as a bio indicator plant. The plant phytotoxicity, plant height, dry mass accumulation and leaf area where the evaluations were performed at 21 days after the sowing of the cucumber were analyzed. The 2.4-D herbicide didn`t present significant difference between treatments for the plant phytotoxicity variable, however, there was difference between treatments for plant height and dry mass. For leaf area, the difference was observed only for soil depths. Atrazine herbicide also showed no difference between treatments for plant phytotoxicity, but there was a difference between treatments and soil depths for the other variables. Under the conditions evaluated, 2,4-D and atrazine herbicides can leach into clayey soil regardless of the dose used and can reach up to 30 cm depth.

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de Paula, Rodrigo T., Adley Bergson G. de Abreu, Maria Eliana L. R. de Queiroz, Antônio A. Neves, and Antônio A. da Silva. "Leaching and persistence of ametryn and atrazine in red–yellow latosol." Journal of Environmental Science and Health, Part B 51, no. 2 (2015): 90–95. http://dx.doi.org/10.1080/03601234.2015.1092819.

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Zanão Júnior, Luiz Antônio, Renildes Lúcio Ferreira Fontes, Paulo Henrique Moreira Coelho, Gaspar Henrique Korndörfer, and Laércio Zambolim. "Soil-applied silicon decreases severity of wheat spot blotch on silicon-deficient soils." Revista Brasileira de Ciência do Solo 34, no. 2 (2010): 401–8. http://dx.doi.org/10.1590/s0100-06832010000200013.

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Spot bloth caused by Bipolaris sorokiniana is an important wheat desease mainly in hot and humid regions. The aim of this study was to evaluate the response of wheat to different sources and modes of Si application, as related to the severity of wheat spot blotch and plant growth, in two Si-deficient Latosols (Oxisols). An greenhouse experiment was arranged in a 2 x 5 factorial completely randomized design, with eight replications. The treatments consisted of two soils (Yellow Latosol and Red Latosol) and five Si supply modes (no Si application; Si applied as calcium silicate and monosilicic acid to the soil; and Si applied as potassium silicate or monosilicic acid to wheat leaves). No significant differences were observed between the two soils. When Si was applied to the soil, regardless the Si source, the disease incubation period, the shoot dry matter yield and the Si content in leaves were greater. Additionally, the final spot blotch severity was lower and the area under the spot blotch disease progress curve and the leaf insertion angle in the plant were smaller. Results of Si foliar application were similar to those observed in the control plants.

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Uyeda, Claudio A., Jarbas H. de Miranda, Sergio N. Duarte, Pedro R. F. de Medeiros, and Carlos T. dos S. Dias. "Influence of vinasse application in hydraulic conductivity of three soils." Engenharia Agrícola 33, no. 4 (2013): 689–98. http://dx.doi.org/10.1590/s0100-69162013000400008.

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The potassium ion, present in great amount in the vinasse because it is a monovalent cation, has the characteristic of promoting the dispersion of clay particles, in the same way as the sodium, causing a reduction in the pore space of the soil and, in its turn, reducing its permeability. To evaluate this effect of reduction by application of vinasse to the soil, an experiment was conducted for three different soils, with the objective of evaluating the effect of the application of different doses of vinasse on hydraulic conductivity of saturated soil and verifying its possible chemical changes of these soils. For that, it was used PVC columns (in a scheme of constant head permeameter to obtain the values of hydraulic conductivity of saturated soil), filled with three soils - Dark Red Latosol (DRL), Purple Latosol (PL) and Eutrophic Red Nitossol (ERN) - , in which were applied four doses of vinasse (0, 150, 300 and 450m³ ha-1), distributed in a completely randomized design with a 3x4 factorial scheme with three replications. The results evidenced that only the Dark Red Latosol (DRL) showed a reduction in the values of hydraulic conductivity of saturated soil, and in front of the application of vinasse, up to 300m³ ha-1, it was observed an increase in the concentrations of potassium, calcium and cation exchange capacity (CEC) ions.

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Becegato, Valter Antonio, Francisco José Fonseca Ferreira, and William César Pollonio Machado. "Concentration of radioactive elements (U, Th and K) derived from phosphatic fertilizers in cultivated soils." Brazilian Archives of Biology and Technology 51, no. 6 (2008): 1255–66. http://dx.doi.org/10.1590/s1516-89132008000600022.

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Gamma spectrometric measurements were obtained for the agricultural soils aiming at characterizing the spatial distribution of radionuclide concentrations (K, eU and eTh), as well for the samples of phosphatic fertilizers and agricultural gypsum. In the study areas, three types of soils occured: Eutrophic Red Nitosol (Alfisoil), Eutroferric Red Latosol of clayey texture (Oxisoil) and Dystrophic Red Latosol of medium texture (Oxisoil). The results showed that the radionuclide concentrations in more clayey soils were higher than in more sandy soils, mainly as a function of a higher adsorption capacity of the former. For the area where human activity predominated, the average contents of K, eU and eTh were respectively 54.75; 10.22 and 7.27 Bq/Kg, significantly higher than those for the area where no fertilizers were used (34.15 Bq/Kg K; 1.69 Bq/Kg eU, and 5.36 Bq/Kg eTh). Variations in the radionuclide concentrations were also observed in various fertilizer formula used in soybean and wheat crops.

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Tavares Filho, João, Graziela Moraes de Césare Barbosa, and Adriana Aparecida Ribon. "Water-dispersible clay in soils treated with sewage sludge." Revista Brasileira de Ciência do Solo 34, no. 5 (2010): 1527–34. http://dx.doi.org/10.1590/s0100-06832010000500005.

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A by-product of Wastewater Treatment Stations is sewage sludge. By treatment and processing, the sludge is made suitable for rational and environmentally safe use in agriculture. The aim of this study was to assess the influence of different doses of limed sewage sludge (50 %) on clay dispersion in soil samples with different textures (clayey and medium). The study was conducted with soil samples collected from native forest, on a Red Latosol (Brazilian classification: Latossolo Vermelho distroférrico) loamy soil in Londrina (PR) and a Red-Yellow Latosol (BC: Latossolo Vermelho-Amarelo distrófico) medium texture soil in Jaguapitã (PR). Pots were filled with 3 kg of air-dried fine earth and kept in greenhouse. The experiment was arranged in a randomized block design with six treatments: T1 control, and treatments with limed sewage sludge (50 %) as follows: T2 (3 t ha-1), T3 (6 t ha-1), T4 (12 t ha-1), T5 (24 t ha-1) and T6 (48 t ha-1) and five replications. The incubation time was 180 days. At the end of this period, the pots were opened and two sub-samples per treatment collected to determine pH-H2O, pH KCl (1 mol L-1), organic matter content, water-dispersible clay, ΔpH (pH KCl - pH-H2O) and estimated PZC (point of zero charge): PZC = 2 pH KCl - pH-H2O, as well as the mineralogy of the clay fraction, determined by X ray diffraction. The results showed no significant difference in the average values for water-dispersible clay between the control and the other treatments for the two soil samples studied and ΔpH was the variable that correlated best with water-dispersible clay in both soils.

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Silva, Adriana Aparecida, and Selma Simões Castro. "MACRO AND MICROMORPHOLOGIC INDICATORS OF PHYSICAL CLAYEY RED LATOSOL CULTIVATED WITH SUGARCANE." Mercator 14, no. 3 (2015): 169–85. http://dx.doi.org/10.4215/rm2015.1403.0010.

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Cristiane, Belmonte, Caroline Coppo Jéssica, Corvetto de Andrade Eloi, et al. "Crambe performance depending on the potassium doses and cultivation in red latosol." African Journal of Agricultural Research 11, no. 51 (2016): 5145–51. http://dx.doi.org/10.5897/ajar2016.11032.

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Navroski, Deisi, Adônis Moreira, Maria De Fátima Guimarães, and Arnaldo Colozzi Filho. "Changes in microbiological attributes of a red latosol under different cropping systems." Semina: Ciências Agrárias 39, no. 3 (2018): 971. http://dx.doi.org/10.5433/1679-0359.2018v39n3p971.

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The objective of this study was to evaluate changes in microbiological attributes of soils under different growing systems. Three cropping systems were evaluated (1) no-tillage system (NTS); (2) conventional tillage system (CTS); and (3) newly scarified no-tillage system (SNTS). The three systems were maintained for 20 years. In addition, a primary forest (PF) fragment was used as a reference. Soil samples were collected at depths of 0.0-0.1 m, 0.1-0.2 m, and 0.2-0.3 m. The following variables were measured: microbial biomass carbon (MBC); soil respirometry (RESP) using the fumigation and incubation method; microbial biomass nitrogen (MBN) using fumigation and extraction; metabolic quotient (qCO2) using the RESP-MBC ratio; and number of spores (NS) of mycorrhizal fungi by plate counting of spores extracted from the soil by wet sieving. Treatments were arranged in a completely randomized block design with five replicates. The different management systems affected the soil microbiota, especially in the superficial layer of 0.0-0.1 m. At a depth of 0.0-0.2 m, the PF presented significantly higher values for all analyzed attributes, except for NS. There were no significant differences in the studied characteristics between the NTS and SNTS at the three depths, indicating that scarification performed only once in the NTS was not sufficient to produce changes in soil microbiological attributes. However, the adoption of the CTS for 20 years promoted a decrease in MBC and MBN. RESP and NS were not significantly different between the cropping systems. Principal component analysis indicated a significant difference in microbiological characteristics between the PF and the areas under management. Therefore, different growing systems change the soil microbiota, and the lower the degree of tilling (NTS and SNTS), the smaller the changes in soil microbiological attributes. Soil preparation practices used in conventional tilling negatively affect soil microbial biomass, decreasing the levels of MBC and MBN.

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Corrêa, Fernando Rezende, Virgínia Damin, Alberto Leão de Lemos Barroso, Hugo de Almeida Dan, and José Arnaldo de Sousa Junior. "Saflufenacil Dose-Response Curves Applied to Brazilian ‘Cerrado’ Soils." Journal of Agricultural Science 11, no. 4 (2019): 349. http://dx.doi.org/10.5539/jas.v11n4p349.

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The objective of this study was to evaluate the phytotoxicity of saflufenacil in Brazilian Cerrado soils with contrasting properties. Experiments were performed in a factorial design. To quantify herbicide phytotoxicity, the bioassay technique was used and cucumber (Cucumis sativum) was selected as a test plant. A greater reduction of the dry mass was observed for bioindicator plants in comparison to others in the Typic Dystrophic Red Latosol. A rate of 11.76 g i.a. ha-1 was required to reach 50% reduction of the plant dry mass for this soil. Rates of 30.87; 44.10, and 119.56 g i.a. ha-1, respectively, are needed to achieve a 50% reduction of the plant dry mass in the Typic Acric Red Latosol, Typical Orthic Arenosols Quartzipsamment, and Washed Sand. The bioavailability of saflufenacil is affected by soil properties and therefore the soil type should be considered when deciding upon possible rates.

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Mauro, Eloi Nappo, Sergio Pereira Reginaldo, Pereira Miguel Eder, et al. "The effect of vegetation covers on the physical properties of a red latosol." African Journal of Agricultural Research 12, no. 43 (2017): 3154–59. http://dx.doi.org/10.5897/ajar2017.12694.

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Müller, Marcelo Marques Lopes, Cassio Antônio Tormena, Aline Marques Genú, Luiz Fernando Machado Kramer, Leandro Michalovicz, and Eduardo Fávero Caires. "Structural quality of a no-tillage red latosol 50 months after gypsum aplication." Revista Brasileira de Ciência do Solo 36, no. 3 (2012): 1005–14. http://dx.doi.org/10.1590/s0100-06832012000300030.

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Gypsum application may enhance the soil quality for plants in terms of soil chemical and physical properties. The objective of this study was to evaluate the effects of gypsum application on the structural quality of a no-tillage Red Latosol. The experiment was initiated in September 2005 in Guarapuava-PR, with gypsum applications of 0; 4; 8; and 12 Mg ha-1 on the soil surface. In November 2009, two soil blocks were sampled from the 0-0.3 m layer for visual evaluation of the soil structure quality (Sq) and to determine the aggregate-tensile strength (ATS). Soil penetration resistance (PR) and gravimetric moisture (H%) of the 0-0.300 m layer were evaluated, and soil cores were collected (layers 0.000-0.075 and 0.075-0.150 m), to determine soil bulk density (BD), total soil porosity (TP), microporosity (Mi), and macroporosity (Ma). Data were subjected to analysis of regression at 5 %. No significant effects of gypsum application on ATS and H % of aggregates were observed, but for Sq, a quadratic effect (0.000-0.075 m) and linear increase (0.075-0.150 and 0.150-0.300 m) were stated, indicating soil quality decrease, although Sq remained mostly below 3.0, with good to intermediate soil quality. Soil PR increased with gypsum, but also remained below critical levels. No effect was observed for soil H % at the moment of PR determination on the field. The gypsum applications decreased BD in the 0.075-0.150 m layer, and increased PT and Ma, while in 0.000-0.075 m some Ma was converted to Mi, without affecting PT and BD. These last results indicate a gain in soil structural quality by gypsum applications, but the higher scores of soil structure and values of soil penetration resistance, though still below thresholds, should be monitored to prevent limitations to soil use in the future.

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Levinski-Huf, Flávia, and Vilson Antonio Klein. "Organic matter and physical properties of a Red Latosol under an integrated crop-livestock-forestry system1." Pesquisa Agropecuária Tropical 48, no. 3 (2018): 316–22. http://dx.doi.org/10.1590/1983-40632018v4852737.

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ABSTRACT Soil management practices and uses, in the integrated crop-livestock-forestry (ICLF) production system, influence the soil properties in different ways. This study aimed to assess the organic matter content and physical properties of a Red Latosol (Oxisol), in the forestry and crop components of an ICLF system. A split-plot randomized block design was used, with six blocks containing two main plots (forestry and crop) and eight split plots (sampled soil layers), totaling 16 treatments and 96 samples. The following variables were analyzed: organic matter, soil density, relative density, pore size distribution, Atterberg limits and aggregate stability. The presence of the forestry component improves the mean weight and geometric mean diameters, as well as the aggregates stability index of the Red Latosol, at five years after the implementation of the system. The aggregates stability in water and the Atterberg limits are the soil physical properties that better express the changes in the soil, with the inclusion of the forestry component. Including this component in the production system, throughout the years (> 5 years), improves the soil properties.

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Yamashita, Oscar Mitsuo, Rafael Cesar Tieppo, Ricardo Vicentin Carvalho, et al. "Mobility of flumioxazin herbicide in a Dystrophic Red Yellow Latosol at Brazilian Southern Amazon." MAY 2020, no. 14(05):2020 (May 20, 2020): 775–81. http://dx.doi.org/10.21475/ajcs.20.14.05.p2164.

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Herbicides are chemicals which can contaminate soil and water, if inadvertently used. In the soil, the herbicide may undergo adsorption and leaching or degradation by physical, chemical and biological processes in addition to being absorbed by the weeds and / or cultivation. The aim of this study was to determine the mobility of flumioxazin in Dystrophic Red Yellow Latosol, in the southern Amazon, using sorghum plant as test under different rainfall indexes. We used PVC pipes, which were filled with soil. The experimental design was completely randomized in a 2x2x5 factorial scheme, consisting of herbicide treatments [with or without flumioxazin (50 g i.a. ha-1)], rain (40 or 80 mm) and soil depths (2.5, 5, 10, 15 and 30 cm). After each rainfall simulation, the tubes were removed and sorghum seeds were placed in the depths 2.5, 5, 10, 15 and 30 cm from the top of the columns. It was observed a higher activity of flumioxazin in the initial 2.5 cm. In all depths where herbicide effect was observed, it was also observed the interruption of sorghum growth, being more intense in the simulations of 80 mm of rainfall. The herbicide presented high adsorptive capacity in Dystrophic Red Yellow Latosol, with mobility up to the first 2.5 cm along the profile.

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Pigozzo, Ana Tereza Jordão, Ervim Lenzi, Jorge de Luca Junior, Carlos Alberto Scapim, and Antonio Carlos Saraiva da Costa. "Transition metal rates in latosol twice treated with sewage sludge." Brazilian Archives of Biology and Technology 49, no. 3 (2006): 515–26. http://dx.doi.org/10.1590/s1516-89132006000400020.

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Agricultural recycling of sewage sludge has been a source of accumulation of heavy metals in the environment which may reach toxic levels and cause serious damage to the biota. Field experiments were undertaken for two agricultural years (2000 and 2002) and effects of two sewage sludge applications were evaluated through the extraction of (essential and non-essential) transition metals by diethylenetriaminepentaacetic acid (DTPA) extractor in a medium texture dystrophic Dark Red Latosol. Cd, Ni, Co, Pb and Cr were not detected. Application of sewage sludge initially caused a slight pH rise in the soil; later pH lowered and kept itself close to the starting level. It could be concluded that through consecutive sludge application, extractable rates of Fe and Mn in soil samples gradually increased during the two agricultural years in proportion to sewage sludge doses and sampling period. In fact, they were higher than rates of control. Due to low concentrations of soil samples, extractor had a restricted capacity for evaluation of its phytoavailability.

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Santos, Divina Cleia Resende dos, Paulo Márcio Fernandes Viana, Gisele Carneiro Silva, and Elton Fialho Reis. "Simulated Traffic Dynamic Loading on Physical Properties of a Red Latosol under No-Tillage." Journal of Agricultural Science 10, no. 4 (2018): 192. http://dx.doi.org/10.5539/jas.v10n4p192.

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The use of intensive mechanization in no-tillage areas can change soil physical conditions, mainly in the “Cerrado”, which has reduced cover ratio. This study aimed to evaluate physical and mechanical properties of a red latosol under no-tillage and subjected to simulated dynamic traffic in different surfaces conditions. For this, soil samples were collected, with dimensions of 0.2 × 0.2 × 0.3 m (height, width and length), in an area subjected to no-tillage in the last four years. Subsequently, samples were transported to the laboratory and subjected to different traffic levels in a simulator. Shortly after, a completely randomized experimental design was set up, in factorial 2 × 5, with two covers (with and without haystack) and five traffic levels (zero, one, two, four and eight run overs) applied by the simulator. Assessed physical properties were superficial settlement, soil density, compaction degree and pre-consolidation pressure. Results showed that superficial settlement, soil density and compaction degree were significantly influenced by soil cover and traffic intensity. Pre-consolidation was not affected by cover, and had higher values when subjected to more traffic intensity.

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Airoldi, Claudio, and Silvana A. M. Critter. "The inhibitor effect of copper sulphate on microbial glucose degradation in red latosol soil." Thermochimica Acta 288, no. 1-2 (1996): 73–82. http://dx.doi.org/10.1016/s0040-6031(96)03047-x.

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Cavalcante, V. S., R. M. Prado, H. J. Almeida, T. M. R. Silva, R. A. Flores, and M. A. Pancelli. "Potassium nutrition in sugar cane ratoons cultured in red latosol with a conservationist system." Journal of Plant Nutrition 39, no. 3 (2015): 315–22. http://dx.doi.org/10.1080/01904167.2015.1009111.

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Braga, Rafael Malfitano, Moacir de Souza Dias Junior, Francisco de Assis Braga, and Thiago de Paula Protásio. "Physical attributes of distroferric red latosol under four eucalypt species over the long term." Ciência e Agrotecnologia 37, no. 4 (2013): 313–22. http://dx.doi.org/10.1590/s1413-70542013000400004.

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Planted forests have been increasingly highlighted in the Brazilian scenario, maintaining status regarding their environmental effects, among them those related with soils. The objectives of this work were to evaluate and to compare the physical attributes of a typic distroferric Red Latosol under Eucalyptus cloeziana, E. grandis, E. Pilularis and Corymbia maculata coverage, 37 years after being planted at the Federal University of Lavras campus. The soil profiles were sampled down to 1 m depth in order to analyze their particle-size distribution, porosity, structure and water retention. The results were submitted to analysis of variance, Scott-Knott multiple means comparison test, correlations and linear regression. The profiles presented appropriated soil physical conditions to provide good plant development. The bulk density and microporosity increased in depth while the total pore volume, macroporosity and aggregates stability decreased in depth. The soil profiles under E. cloeziana and C. maculata coverage presented lower density, more pores, are more structured, present lower water retention capability and lower water availability than the soil profiles under E. grandis and E. pilularis.

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Cabral, Juarez R., Paulo S. L. de Freitas, Roberto Rezende, Antonio S. Muniz, and Altair Bertonha. "Changes in chemical properties of distrophic Red Latosol as result of swine wastewater application." Revista Brasileira de Engenharia Agrícola e Ambiental 18, no. 2 (2014): 210–16. http://dx.doi.org/10.1590/s1415-43662014000200012.

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Swine wastewater (SW) has characteristics that allow its disposal in the soil as a fertilizer. This is an alternative in order not to accumulate this material in the farm as well as it provides savings with mineral fertilizers. The aim of this study was to evaluate the effect of applying swine wastewater on the chemical properties of a distrophic Red Latosol for two seasons. The experiment was carried out under field conditions with treatments defined as T0 = 0 (control), T1 = 150, T2 = 300, T3 = 450, T4 = 600, T5 = 750 m3 ha-1 of SW applied during the crop cycle of elephant grass. SW application contributed to the increase of magnesium and phosphorus and the reduction of soil aluminum in the first season. As for the second season when compared to the first one, there were reductions in K, Ca, and P concentrations. Hence applications of SW did not contribute to the increase in concentration of elements in the soil.

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Reichardt, Klaus, Osny O. S. Bacchi, Maria de las Mercedes Villagra, Ariovaldo L. Turatti, and Zildene O. Pedrosa. "Hydraulic variability in space and time in a dark red latosol of the tropics." Geoderma 60, no. 1-4 (1993): 159–68. http://dx.doi.org/10.1016/0016-7061(93)90024-f.

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Gomes, Schaianne A., Sayonara A. do C. M. Arantes, Ednaldo A. de Andrade, Kelte R. Arantes, Daniela N. Viana, and Cezar da C. Pereira Junior. "Residual effect of mixture of glyphosate and 2,4-D in winter maize in different soil textures." Revista Brasileira de Engenharia Agrícola e Ambiental 21, no. 5 (2017): 317–21. http://dx.doi.org/10.1590/1807-1929/agriambi.v21n5p317-321.

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ABSTRACT To increase the efficiency in the control of weeds, it is common the use of a mixture of the herbicides glyphosate and 2,4-D in the desiccation. This paper aimed to evaluate the residual effect of these two herbicides on the development of maize plants, in soils of different textures. The experiment was conducted in a greenhouse, in 2015, in a completely randomized design in a 2 x 2 x 7 factorial scheme, corresponding to two soils (Red Yellow Latosol and Quartzarenic Neosol), two herbicide application times (5 and 10 days before maize sowing) and seven doses of herbicides (recommended dose of glyphosate, recommended dose of 2,4-D; mixing the recommended doses of glyphosate and 2,4-D; two, ten and fifty times the recommended doses in admixture; and one control), with 4 replicates. After emergence of maize plants, the following variables were evaluated: phytotoxicity, plant height, chlorophyll a and chlorophyll b, shoot fresh and dry matter and root dry matter. In general, there was lower residual effect on the Red Yellow Latosol at all the doses of the herbicides and in the interval of 10 days between the desiccation and sowing.

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Almeida, Alexsandro C. dos S., Higor H. O. Santos, Dhiego P. Bortolo, Elaine R. P. Lourente, Jorge W. Cortez, and Fabricio C. de Oliveira. "Soil physical properties and yield of soybean and corn grown with wastewater." Revista Brasileira de Engenharia Agrícola e Ambiental 22, no. 12 (2018): 843–48. http://dx.doi.org/10.1590/1807-1929/agriambi.v22n12p843-848.

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ABSTRACT This study aimed to evaluate soybean and corn yields and soil physical attributes of a Dystrophic Red Latosol fertilized with swine wastewater (SW). Therefore, a field experiment was conducted in randomized blocks to evaluate five treatments of fertilization in the 2014/2015 season (soybean in the summer and corn in the second season). The treatments were: T1 - control (fertilized exclusively with chemical fertilizers); T2 - fertilized with 1270 m3 ha-1 of SW; T3 - fertilized with 170 m3 ha-1 of SW; T4 - fertilized with 50 m3 ha-1 of SW; and T5 - fertilized with 50 m3 ha-1 of SW + chemical fertilization. Soil samplings and soil physical analyses were performed before soybean cultivation and after corn harvest. No significant alteration was observed in soil physical attributes during the evaluation period. The application of swine wastewater in the fertilization of soybean and corn, cultivated in Dystrophic Red Latosol with high clay contents, positively affected these crops, since it led to good yields in soybean (with an average of 2990.85 kg ha-1) and increased corn yields (with a maximum of 7126.5 kg ha-1). In addition, soil physical properties were not altered.

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Falleiros, M. C., A. Ravelo Sanchez, M. Dornelas de Souza, O. O. S. Bacchi, J. E. Pilotto, and K. Reichardt. "Neutron probe measurement of soil water content close to soil surface." Scientia Agricola 50, no. 3 (1993): 333–37. http://dx.doi.org/10.1590/s0103-90161993000300002.

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The problem of neutron probe soil water content measurements close to soil surface is analysed from the spatial variability and also from the slow neutron "loss" to the atmosphere points of view. Results obtained on a dark red latosol of the county of Piracicaba,SP, indicate the possibility of precisely measuring the neutron "sphere of influence" when different media are used on soil surface.

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Kiehl, J. C., R. I. Silveira, and J. Brito Neto. "Rates and methods of applying urea to common beans." Scientia Agricola 50, no. 2 (1993): 254–60. http://dx.doi.org/10.1590/s0103-90161993000200013.

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The effect of rate and method of urea application on the yield of common beans (Phaseolus vulgaris L., cv. IPA-1) was evaluated on a Red-Yellow Latosol (Psamentic Haplortox) of Arapiraca and on a Solodic Planosol (Ustalf) of Igaci, both sandy-clay-loams located in the State of Alagoas, Brazil. Rates of 30,60 and 90 kg N/ha were applied placing the urea totally in the furrow at planting time; totally sidedressed twenty days after planting, mixed or not with the soil; or 1/3 of the amount in the furrow at planting plus 2/3 sidedressed twenty days after planting, mixed or not with the soil. Bean yield responses to nitrogen followed quadratic equations. In the Red-Yellow Latosol response to nitrogen occurred up to the rate of 66 kg N/ha, while in the Solodic Planosol the yield increased up to the highest applied rate of 90 kg N/ha. The relative yield increase for each site was 22% and 16%, respectively. Sidedressed application of the total amount of urea resulted in the lowest yields, whereas split application and furrow fertilization were the best and equally effective methods. No significant yield increase was observed by mixing the urea with the soil.

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