Resistência Mecânica Do Solo À Penetração Associado À Umidade, Densidade, Granulometria E Macronutrientes Em Ji-Paraná-Ro / Soil Mechanical Resistance to Penetration Associated With Humidity, Density, Granulometry and Macronutrients in Ji-Paraná-Ro

Soil compaction is a worldwide problem in agricultural areas, and it is important to define soil properties and reference values that allow knowledge of the compaction level for decision making. The objective of this study was to define the critical values of physical properties associated with the compaction of soils. Three Ultisols and two Oxisols, under different management systems, were collected at different depths for an evaluation of particle size, volumetric moisture, bulk density, and porosity. In the field, soil resistance to penetration and the root length of the soybean and edible black bean crop were measured. The soil profiles presented horizontal layers with similar resistance, but in some cases, there is discontinuity of these layers, which allows the roots to use the zones of lower resistance to deepen in the profile. The values of bulk density and resistance to penetration critical to soybean and edible black bean (only in sandy loam soil) root growth, according to soil textural class, are: sandy loam = 1.66 Mg m−3 and 1.5 to 2 MPa; loam and clay loam = 1.52 Mg m−3 and 1 to 1.5 MPa; silty clay loam and silty clay = 1.32 Mg m−3 and 1.5 to 2 MPa; and clay = 1.33 to 1.36 Mg m−3 and 2 to 3.5 MPa.

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Critical Limits for Soybean and Black Bean Root Growth, Based on Macroporosity and Penetrability, for Soils with Distinct Texture and Management Systems

Suzuki

Reinert

Alves

et al. 2022

Sustainability

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Linear and spatial variability of eucalyptus dendrometric attributes correlated with the properties of a Typic Haplustox soil (Oxisol) in the Brazilian savannah

Martins

Silva

Troleis

et al. 2022

Semina: Ciênc. Agrár.

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Effects of soil attributes using the geostatistical tool improves the interpretation of specific soil management. Thus, this study aimed to evaluate the physical, chemical, and microbiological properties of a Typical Haplustox (Oxisol), identifying those with the best linear and spatial correlation with eucalyptus (Eucalyptus spp.) vegetative growth. The experiment was conducted at the Teaching, Research, and Extension Farm (FEPE) of the Universidade Estadual Paulista (UNESP), Campus of Ilha Solteira. Thirty-five points spaced 13 meters apart were demarcated for analysis, which were distributed in 5 rows of 7 points each. From each point, 2 soil samples were collected from the 0-10 cm depth layer. The physical, chemical, and microbiological soil properties evaluated were: sand, silt, and clay contents; penetration resistance (PR), gravimetric moisture (GM), real density (RD), microbial biomass carbon (MBC), respirometry (CO2-C), metabolic quotient (qCO2), organic matter content (OM), and hydrogenionic potential (pH). The eucalyptus attributes assessed were: plant height (PH) and circumference at breast height (CBH). Each attribute was analyzed by descriptive statistics using the SAS software. Data frequency distribution was verified by the Shapiro Wilk method, and geospatial changes were analyzed by the GS+ software. The soil property that best explained the variability in eucalyptus dendrometric attributes was real density (RD). Except for RD, all properties did not show spatial dependence (i.e., pure nugget effect), which significantly represents eucalyptus vegetative performance.

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Assessment of Soil Compaction in an Area in the Urban Perimeter in the City of Porto Velho/Ro

De Brito,

Da Silva Filho,

Duarte

et al. 2024

Rev. Foco

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The lack of adequate urban planning, combined with the disorderly growth of Brazilian cities, brings a series of environmental problems resulting from human action. Among these, the pollution of soils and water bodies, soil compaction, and impermeabilization stand out. These issues lead to alterations in surface runoff and natural drainage, resulting in flooding. This study assessed the degree of soil compaction in an area located within the urban perimeter of the municipality of Porto Velho, Rondônia. The assessment was carried out using a Stolf Impact Penetrometer to measure soil penetration resistance at 18 points. Subsequently, interpolation was performed using the Kriging method to generate a continuous surface. The results show that the eastern portion of the study area, where points P6, P12, and P18 are located, and a smaller portion in the southern region, where point P16 is situated, exhibit higher values of soil penetration resistance, ranging from 2.05 to 2.47 MPa. The observed values indicate high compaction of the local clayey soil and are associated with intense demographic occupation in these areas, followed by human activities and the removal of natural vegetation. This, combined with an inefficient urban drainage system, has caused disruptions to the local population.

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Resistência Mecânica Do Solo À Penetração Associado À Umidade, Densidade, Granulometria E Macronutrientes Em Ji-Paraná-Ro / Soil Mechanical Resistance to Penetration Associated With Humidity, Density, Granulometry and Macronutrients in Ji-Paraná-Ro

Abstract: Thays da Silva Mandu Mestre em Ciências (energia nuclear na agricultura e no ambiente) -Centro de Energia Nuclear na Agricultura CENA/USP. Docente EBTT no Instituto Federal do Acre -Campus Tarauacá -BR 364, km 539.

Cited by 3 publications

References 6 publications

Critical Limits for Soybean and Black Bean Root Growth, Based on Macroporosity and Penetrability, for Soils with Distinct Texture and Management Systems

Critical Limits for Soybean and Black Bean Root Growth, Based on Macroporosity and Penetrability, for Soils with Distinct Texture and Management Systems

Linear and spatial variability of eucalyptus dendrometric attributes correlated with the properties of a Typic Haplustox soil (Oxisol) in the Brazilian savannah

Assessment of Soil Compaction in an Area in the Urban Perimeter in the City of Porto Velho/Ro

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