Physical properties and organic carbon content of a Typic Hapludult soil fertilised with pig slurry and pig litter in a no-tillage system

Soil Research ◽  
2013 ◽  
Vol 51 (5) ◽  
pp. 459 ◽  
Author(s):  
Jucinei José Comin ◽  
Arcângelo Loss ◽  
Milton da Veiga ◽  
Renato Guardini ◽  
Djalma Eugênio Schmitt ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Physical Properties ◽  
Aggregate Stability ◽  
Soil Surface ◽  
Total Porosity ◽  
Soil Bulk Density ◽  
Organic Carbon Content ◽  
Pig Slurry ◽  
No Tillage ◽  
Tillage System

Applications of swine residues to the soil surface in a no-tillage system (NTS) may increase the organic carbon level and improve the physical properties of the soil. This study aimed to evaluate the effect of the continuous application of pig slurry (PS) and pig litter (PL) on the total organic carbon (TOC) content and physical properties of soil under NTS in Southern Brazil. In March 2010, after 8 years of cultivation of black oats (Avena strigosa)–maize (Zea mays), soil samples were collected in the 0–5, 5–10, 10–15, and 15–20 cm layers. The treatments consisted of a control plot (without manure application), plots with PS applications equivalent to one and two times the recommended rate of nitrogen (N) for maize and black oats (PS1X and PS2X, respectively), and plots with PL equivalent to one and two times the recommended rate of N for maize and black oats (PL1X and PL2X, respectively). The TOC, soil bulk density (BD), penetration resistance (PR), total porosity (TP), macro- and microporosity, distribution of pore diameters, and indices of aggregation and aggregate stability were evaluated. Differences were found between treatments for TOC, BD, macro- and microporosity, pore diameter, aggregation, and PR. Treatment with PL favoured the production of aggregates (diameter >4 mm) and increased the rates of aggregation and aggregate stability in the 10–15 and 15–20 cm layers and macroporosity in the 0–5 and 15–20 cm layers. Application of PL2X reduced PR by 34% and 20%, respectively, in the 5–10 and 10–15 cm layers. Eight years of adding PS to successive cultivations of black oats–maize soil managed under NTS produced no changes in the physical features or the TOC of the soil, whereas the application of PL produced improvements in physical attributes of the soil and increased soil TOC.

scholarly journals Injection of liquid swine slurry and effects on properties of a Nitossolo Vermelho

2018 ◽  
Vol 53 (4) ◽  
pp. 518-521 ◽  
Author(s):  
Cleber Rech ◽  
Jackson Adriano Albuquerque ◽  
Juliano Corulli Corrêa ◽  
Alvaro Luiz Mafra ◽  
Diego Bortolini
Keyword(s):  
Organic Carbon ◽  
Physical Properties ◽  
Carbon Content ◽  
Bulk Density ◽  
Soil Bulk Density ◽  
Organic Carbon Content ◽  
No Tillage ◽  
Swine Slurry ◽  
Tillage System ◽  
Liquid Slurry

Abstract: The objective of this work was to evaluate the superficial and injected applications of swine slurry and urea to the soil, regarding their effects on the physical properties of a Nitossolo Vermelho distroférrico under a no-tillage system. The treatments were: injected slurry into the groove with a liquid swine slurry injector (LSSI); slurry on surface, applied on the lines by the LSSI kept raised; urea injected by opening the groove with the LSSI and distributed manually; and corn, under no-tillage, as a control. Sowing and the injection of liquid slurry or urea do not modify the organic carbon content, pH, and aggregation, but alter the soil bulk density and porosity in the mobilized line, and increase the macropores.

scholarly journals Influence of ryegrass managements on the physical properties of a Haplohumox

2018 ◽  
Vol 53 (8) ◽  
pp. 952-960 ◽  
Author(s):  
Bruno Vizioli ◽  
Karina Maria Vieira Cavalieri-Polizeli ◽  
Gabriel Barth
Keyword(s):  
Organic Carbon ◽  
Physical Properties ◽  
Total Organic Carbon ◽  
Bulk Density ◽  
Block Design ◽  
Soil Bulk Density ◽  
Pedotransfer Functions ◽  
Root Penetration ◽  
Organic Carbon Content ◽  
No Tillage

Abstract: The objective of this work was to evaluate the influence of ryegrass (Lolium multiflorum) managements on the physical properties of a Haplohumox, and on the yields of corn and of ryegrass cultivated in succession to corn. The experiment was carried out in a randomized complete block design, with three treatments and three replicates, in which treatments were the different managements of ryegrass under no-tillage for silage, soil cover, and grazing. After nine years of management, samples were collected at 0.00-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30-m soil depths, to determine the following soil properties: texture, total organic carbon, soil bulk density, macroporosity, microporosity, total porosity, and resistance to root penetration. The index of structural stability was estimated from texture and total organic carbon data. Maximum soil bulk density and permanent wilting point were also estimated from pedotransfer functions. Corn and ryegrass dry matter yields were determined from plants harvested inside the plot area. Total organic carbon content increased as depth increased. The ryegrass managements in no-tillage system, in succession to corn, does not influence the soil physical properties of a Haplohumox, and maintains high corn and ryegrass yields.

scholarly journals The effects of land use and soil management on the physical properties of an Oxisol in Southeast Brazil

2014 ◽  
Vol 38 (4) ◽  
pp. 1245-1255 ◽  
Author(s):  
Getulio de Freitas Seben Junior ◽  
José Eduardo Corá ◽  
Rattan Lal
Keyword(s):  
Physical Properties ◽  
Geometric Mean ◽  
Total Porosity ◽  
Field Capacity ◽  
Soil Bulk Density ◽  
Conventional Tillage ◽  
Structural Quality ◽  
Native Forest ◽  
Tillage System ◽  
Least Limiting Water Range

Soils of the tropics are prone to a decrease in quality after conversion from native forest (FO) to a conventional tillage system (CT). However, the adoption of no-tillage (NT) and complex crop rotations may improve soil structural quality. Thus, the aim of this study was to evaluate the physical properties of an Oxisol under FO, CT, and three summer crop sequences in NT: continuous corn (NTcc), continuous soybean (NTcs), and a soybean/corn rotation (NTscr). Both NT and CT decreased soil organic carbon (SOC) content, SOC stock, water stable aggregates (WSA), geometric mean diameter (GMD), soil total porosity (TP), macroporosity (MA), and the least limiting water range (LLWR). However they increased soil bulk density (BD) and tensile strength (TS) of the aggregates when compared to soil under FO. Soil under NT had higher WSA, GMD, BD, TS and microporosty, but lower TP and MA than soil under CT. Soil under FO did not attain critical values for the LLWR, but the lower limit of the LLWR in soils under CT and NT was resistance to penetration (RP) for all values of BD, while the upper limit of field capacity was air-filled porosity for BD values greater than 1.46 (CT), 1.40 (NTscr), 1.42 (NTcc), and 1.41 (NTcs) kg dm-3. Soil under NTcc and NTcs decreased RP even with the increase in BD because of the formation of biopores. Furthermore, higher critical BD was verified under NTcc (1.62 kg dm-3) and NTcs (1.57 kg dm-3) compared to NTscr and CT (1.53 kg dm-3).

scholarly journals Soil organic carbon in no-tillage systems of different ages in Southwest Mato Grosso, Brazil

2021 ◽  
Vol 25 (4) ◽  
pp. 250-255
Author(s):  
Renata M. Severiano ◽  
Maria A. P. Pierangeli ◽  
Nilton de S. Santos ◽  
Vinícius Xavier
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Bulk Density ◽  
Soil Bulk Density ◽  
Carbon Stocks ◽  
Native Vegetation ◽  
No Tillage ◽  
Tillage Systems ◽  
Mato Grosso ◽  
Tillage System

ABSTRACT The objectives of this study were to evaluate the effect of the no-tillage system on soil bulk density, soil organic carbon, and carbon stocks in Plinthic subgroups and Oxisols, located in Pontes and Lacerda, State of Mato Grosso, Brazil. The treatments were native vegetation and no-tillage systems established for 3, 8, 10, and 12 years. To analyse soil organic carbon, soils were sampled in each area, with three repetitions, at layers of 0-0.05; 0.05-0.10; 0.10-0.20; 0.20-0.40; 0.40-0.60; 0.60-1.00; 1.00-1.50 and 1.50-2.00 m. For soil bulk density, undisturbed samples were collected at layers of 0-0.20 and 0.20-0.40 m. Compared with areas of native vegetation, soil bulk density values after 12 years increased by 25% in Oxisols and 30% in the Plinthic subgroups. In Oxisols and Plinthic subgroups, respectively, organic carbon concentration was, on average, 20.57, 25.04 g kg-1 under native vegetation; 16.82, 16.59 g kg-1 after 3 years of no-tillage; 13.31, 4.96 g kg-1 after 8 years; 16.52, 14.39 g kg-1 after 10 years; and 17.97, 18.53 g kg-1 after 12 years. In both soils, the no-tillage system contributed to an increase in carbon stocks over the years, but not at depth, being generally limited to the top 0.20 m of the soils. Compared to native vegetation, after 12 years of no-tillage, carbon stocks decreased at a rate of 0.075 Mg ha-1 year-1 in the Plinthic subgroups and increased by 2.3 Mg ha-1 year-1 in Oxisols.

Modelling dynamic interactions between soil structure and soil organic matter

2020 ◽  
Author(s):  
Nicholas Jarvis ◽  
Elsa Coucheney ◽  
Claire Chenu ◽  
Anke Herrmann ◽  
Thomas Keller ◽  
...  
Keyword(s):  
Organic Matter ◽  
Carbon Sequestration ◽  
Soil Organic Matter ◽  
Organic Carbon ◽  
Physical Properties ◽  
Management Practices ◽  
Animal Manure ◽  
Soil Bulk Density ◽  
Organic Carbon Content

<p>The aggregated structure of soil is known to reduce rates of soil organic matter (SOM) decomposition and therefore influence the potential for long-term carbon sequestration. In turn, the storage and turnover of SOM strongly determines soil aggregation and thus the physical properties of soil. The two-way nature of these interactions has not yet been explicitly considered in soil organic matter models. In this study, we present and describe a new model of these dynamic feedbacks between SOM storage, soil pore structure and soil physical properties. We show the results of a test of the model against measurements made during 61 years in a field trial located near Uppsala (Sweden) in two treatments with different OM inputs (bare fallow, animal manure). The model was able to successfully reproduce long-term trends in soil bulk density and organic carbon content (SOC), as well as match limited data on soil pore size distribution and surface elevation. The results suggest that the model approach presented here could prove useful in analyses of the effects of soil and crop management practices and climate change on the long-term potential for soil organic carbon sequestration.</p>

scholarly journals Soil Aggregation, Organic Carbon Concentration, and Soil Bulk Density As Affected by Cover Crop Species in a No-Tillage System

2015 ◽  
Vol 39 (3) ◽  
pp. 871-879 ◽  
Author(s):  
Adriano Stephan Nascente ◽  
Yuncong Li ◽  
Carlos Alexandre Costa Crusciol
Keyword(s):  
Organic Carbon ◽  
Bulk Density ◽  
Cover Crops ◽  
Cover Crop ◽  
Soil Bulk Density ◽  
Soil Aggregation ◽  
Soil Tillage ◽  
Panicum Maximum ◽  
No Tillage ◽  
Tillage System

Soil aggregation and the distribution of total organic carbon (TOC) may be affected by soil tillage and cover crops. The objective of this study was to determine the effects of crop rotation with cover crops on soil aggregation, TOC concentration in the soil aggregate fractions, and soil bulk density under a no-tillage system (NTS) and conventional tillage system (CTS, one plowing and two disking). This was a three-year study with cover crop/rice/cover crop/rice rotations in the Brazilian Cerrado. A randomized block experimental design with six treatments and three replications was used. The cover crops (treatments) were: fallow, Panicum maximum, Brachiaria ruziziensis, Brachiaria brizantha, and millet (Pennisetum glaucum). An additional treatment, fallow plus CTS, was included as a control. Soil samples were collected at the depths of 0.00-0.05 m, 0.05-0.10 m, and 0.10-0.20 m after the second rice harvest. The treatments under the NTS led to greater stability in the soil aggregates (ranging from 86.33 to 95.37 %) than fallow plus CTS (ranging from 74.62 to 85.94 %). Fallow plus CTS showed the highest number of aggregates smaller than 2 mm. The cover crops affected soil bulk density differently, and the millet treatment in the NTS had the lowest values. The cover crops without incorporation provided the greatest accumulation of TOC in the soil surface layers. The TOC concentration was positively correlated with the aggregate stability index in all layers and negatively correlated with bulk density in the 0.00-0.10 m layer.

scholarly journals Regeneration of Belowground Properties and Nutrient Pools in Soil after Compaction: Response to the Reforestation with Native Tree Species in the Hyrcanian Forest

2020 ◽  
Vol 3 (1) ◽  
pp. 72
Author(s):  
Meghdad Jourgholami ◽  
Rodolfo Picchio ◽  
Farzam Tavankar ◽  
Rachele Venanzi
Keyword(s):  
Tree Species ◽  
Prunus Avium ◽  
Food Resource ◽  
Aggregate Stability ◽  
Soil Surface ◽  
Total Porosity ◽  
Soil Bulk Density ◽  
Nutrient Pools ◽  
Soil C ◽  
Clear Cutting

The current study characterizes the regeneration in the floor layer and topsoil at a depth of 0–10 cm in the skid trails, dealing with the reforestation of four tree species (Fraxinus excelsior, FE; Prunus avium, PA; Acer cappadocicum, AC; and Quercus castaneifolia, QC) after clear-cutting in degraded forests, comparing to the undisturbed natural forest (Carpinus betulus-Parrotia persica; CB-PP). Results showed significant differences in litter layer properties among tree species, with the highest litter thickness, C (carbon), and C/N ratio under QC and AC, and the greatest litter N in CB-PP and FE. FE plantation resulted to enhance soil bulk density (1.14 g cm−3), total porosity (55.85%), macroporosity (37.72%), penetration resistance (1.43 MPa), soil moisture (33.4%), and aggregate stability (51.7%), compared to other tree plantations, whereas these values under the FE plantation were still lower than those of the CB-PP stand over a 30-year period after logging operation. Litterfall on soil surface under planted tree species (FE and PA in particular) can be considered as a primary food resource (i.e., soil C and soil organic matter) driving biological and microbial activities. Results of the current study can improve our knowledge to select suitable tree species to maintain soil quality and nutrients pool to deal with ecosystem restoration programs and reforestation in degraded forest areas.

scholarly journals EFEITO DE RESÍDUOS VEGETAIS DE MILHETO (Pennisetum americanum) E DA CALAGEM EM ALGUMAS PROPRIEDADES FÍSICAS E QUÍMICAS DE UM NITOSSOLO VERMELHO EM SISTEMA DE SEMEADURA DIRETA

Irriga ◽  
2006 ◽  
Vol 11 (3) ◽  
pp. 293-304 ◽  
Author(s):  
Cristiano Coneglian ◽  
Maria Helena Moraes
Keyword(s):  
Organic Matter ◽  
Physical Properties ◽  
Soil Ph ◽  
Organic Matter Content ◽  
Aggregate Stability ◽  
Average Weight ◽  
No Tillage ◽  
Soil Density ◽  
Pennisetum Americanum ◽  
Tillage System

 EFEITO DE RESÍDUOS VEGETAIS DE MILHETO (Pennisetum americanum) E DA CALAGEM EM ALGUMAS PROPRIEDADES FÍSICAS E QUÍMICAS DE UM NITOSSOLO VERMELHO EM SISTEMA DE SEMEADURA DIRETA  Cristiano Coneglian1; Maria Helena Moraes21Casa da Agricultura, Prefeitura Municipal de Lençóis Paulista, Lençóis Paulista, [email protected] de Recursos Naturais da Faculdade de Ciências Agronômicas da Universidade Estadual Paulista, Botucatu-SP  1 RESUMO             As alterações nas características físicas no perfil de um Nitossolo Vermelho Distroférrico, em função da presença da cobertura vegetal de milheto (Pennisetum americanum) com e sem calagem superficial, em sistema de semeadura direta, foram estudadas em experimento conduzido nos anos agrícolas de 1999/2000 e 2000/2001, utilizando-se soja e milho para compor a sucessão de culturas programada. As parcelas de 6 m x 10 m foram constituídas de milheto (Pennisetum americanum) e sem milheto como vegetação de cobertura, com uma única aplicação superficial inicial de 3,1 t ha-1 de calcário na metade de cada parcela, visando obter saturação por bases (V) de 70%, após dessecação do milheto. Foram analisadas algumas propriedades físicas como a densidade do solo, a estabilidade dos agregados, a proporção de agregados >2 mm, a macro e a microporosidade, e as propriedades químicas que constaram dos macronutrientes Ca e Mg, matéria orgânica, pH do solo e H+Al. Os resíduos vegetais de milheto e a calagem superficial não alteraram a densidade do solo, o diâmetro médio ponderado - DMP, os agregados > 2 mm, a macroporosidade e os teores de matéria orgânica do solo, vinte e quatro meses após a implantação do sistema de semeadura direta, para as condições experimentais estudadas. A microporosidade do solo foi afetada significativamente nas camadas inferiores a0,20 m, no tratamento milheto com calcário. Os teores de cálcio, magnésio e H + Al e os valores de pH do solo sofreram alterações significativas na camada superficial entre 0‑0,05 m. UNITERMOS: densidade do solo, porosidade, estabilidade de agregados, cálcio, milheto, plantio direto.  CONEGLIAN, C.; MORAES, M.H. EFFECT OF MILLET RESIDUES (Pennisetum americanum) AND LIMING ON SOME PHYSICAL PROPERTIES OF DISTROFERRIC RED NITOSOL IN NO-TILLAGE SYSTEM  2 ABSTRACT This work studied alterations of physical properties of a distroferric red nitosol due to millet (Pennisetum americanum) covering, with or without liming, in a no-tillage system during the agricultural years of 1999/2000 and 2000/2001, using soybean and corn as culture succession. 6mx10m plots, with and without millet as vegetal covering, received only one initial superficial application of limestone, 3.1 t ha-1 in the first half of each plot in order to obtain 70% base saturation (V), after the desiccation of the millet. Some physical properties as soil density, aggregate stability, > 2 mm aggregate proportion, macro and micro porosity were analyzed whereas the chemical analysis determined Ca and Mg macro nutrients, organic matter, soil pH and H+Al. Millet vegetal residues and surface liming did not alter soil density nor the average weight diameter (AWD), > 2 mm aggregate, soil macro porosity and organic matter content, twenty-four months after the no-tillage system implantation for studied experimental conditions. Soil micro porosity was significantly affected in layers deeper than 0.20 m, in treatment with millet and limestone. Calcium, magnesium and H + Al contents and the soil pH values suffered significant alterations in superficial layer, between 0‑0.05 m. KEYWORDS: soil density, porosity, aggregate stability, calcium, millet, no-tillage system.

scholarly journals ALTERAÇÕES DE PROPRIEDADES FÍSICAS DE UM NITOSSOLO VERMELHO PELA SUCESSÃO MILHETO – SOJA NA FASE DE IMPLANTAÇÃO DO SISTEMA DE SEMEADURA DIRETA

Irriga ◽  
2007 ◽  
Vol 12 (3) ◽  
pp. 409-421
Author(s):  
Sandro Roberto Brancalião ◽  
Maria Helena Moraes ◽  
Leandro Borges Lemos
Keyword(s):  
Physical Properties ◽  
Cover Crop ◽  
Pennisetum Glaucum ◽  
Total Porosity ◽  
Dry Mass ◽  
No Tillage ◽  
Mean Weight Diameter ◽  
Tillage System ◽  
System 2 ◽  
Glycine Max L

ALTERAÇÕES DE PROPRIEDADES FÍSICAS DE UM NITOSSOLO VERMELHO PELA SUCESSÃO MILHETO – SOJA NA FASE DE IMPLANTAÇÃO DO SISTEMA DE SEMEADURA DIRETA  Sandro Roberto Brancalião1; Maria Helena Moraes2; Leandro Borges Lemos31Centro de Solos e Recursos Ambientais, Instituto Agronômico de Campinas, Campinas, SP, [email protected]  2Departamento de Recursos Naturais - Ciência do Solo, Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Botucatu, SP.3Departamento de Produção  Vegetal – Agricultura,  Faculdade de Ciências Agronômicas, Universidade Estadual Paulista, Botucatu, SP  1 RESUMO Este trabalho objetivou avaliar a influência da cultura do milheto, em três épocas de semeadura e sob cinco manejos da fitomassa, na produtividade da soja e nas propriedades físicas de um Nitossolo Vermelho distroférrico (densidade, porosidade total, diâmetro médio ponderado dos agregados e grau de floculação do solo). O delineamento experimental foi o de blocos casualizados, em esquema de parcelas subdivididas, com quatro repetições. A época foi representada por parcelas de semeadura da cultura do milheto (E1, E2, E3) e o manejo, como subparcelas, por manejos de ceifa da fitomassa, a saber: M1- a cada florescimento e retirada da fitomassa; M2 – a cada florescimento e permanência da fitomassa; M3-no único florescimento e retirada da fitomassa; M4 – no único florescimento e permanência da fitomassa; e M5 – livre crescimento. Foram coletadas amostras de solo para realização das análises físicas e químicas, estratificadas em 0-0,05, 0,05-0,10 e 0,10-0,20 m de profundidade. Avaliou-se, também, a produção de massa de matéria seca pelo milheto e a produtividade da soja. A E2 apresentou melhor qualidade física do solo. A E3 resultou em menores valores de grau de floculação e de diâmetro médio ponderado dos agregados. A E3 apresentou menor produção de fitomassa do milheto.   UNITERMOS: manejo do solo, propriedades físicas, planta de cobertura, semeadura direta, Glycine max. (L.) Merrill, Pennisetum glaucum.  BRANCALIÃO, S.R.; MORAES, M.H.; LEMOS, L.B.CHANGES OF PHYSICAL PROPERTIES OF A “NITOSSOLO VERMELHO” BY MILLET – SOYBEAN SUCCESSION AT IMPLANTATION PHASE IN NO-TILLAGE SYSTEM   2 ABSTRACT The aim of this work was to evaluate the effect of a millet-soybean rotation, during the implantation phase of no-tillage system on the physical properties of a “Nitossolo Vermelho distroférrico” and the dry mass production of millet and the productivity of soybean. The experimental design used was a randomized blocks, in a split splot arrangement, with four replications. The parcels was constituted by three sowings (E1, E2and E3) and the subparcels was constituted by harvests, where each harvest handling was: M1 – harvest each blooming and covering withdrawal; M2 - harvest each blooming and covering permanency; M3 – only in the first harvest on blooming and covering withdrawal; M4 - only in the first harvest on blooming and covering permanency, and M5– free growing, with no harvest. Samples were collected from three soil layers: 0-0,05, 0,05-0,10 and 0,10-0,20 m. The E2 showed smaller values of soil density and larger values of total porosity. The E3 resulted in smaller values of flocculation degree and mean weight diameter of the aggregates. The E3showed smaller production of dry mass. KEYWORDS: soil management, physical properties, cover crop, no-tillage, soybean, Pennisetum glaucum. 

scholarly journals USE OF SCALED SEMIVARIOGRAMS IN THE PLANNING SAMPLE OF SOIL PHYSICAL PROPERTIES IN SOUTHERN AMAZONAS, BRAZIL

2015 ◽  
Vol 39 (1) ◽  
pp. 21-30 ◽  
Author(s):  
Renato Eleotério de Aquino ◽  
Milton César Costa Campos ◽  
José Marques Junior ◽  
Ivanildo Amorim de Oliveira ◽  
Daniel De Bortoli Teixeira ◽  
...  
Keyword(s):  
Physical Properties ◽  
Environmental Planning ◽  
Particle Density ◽  
Aggregate Stability ◽  
Total Porosity ◽  
Size Composition ◽  
Soil Bulk Density ◽  
Soil Physical Properties ◽  
The State ◽  
Sample Density

There is a great lack of information from soil surveys in the southern part of the State of Amazonas, Brazil. The use of tools such as geostatistics may improve environmental planning, use and management. In this study, we aimed to use scaled semivariograms in sample design of soil physical properties of some environments in Amazonas. We selected five areas located in the south of the state of Amazonas, Brazil, with varied soil uses, such as forest, archaeological dark earth (ADE), pasture, sugarcane cropping, and agroforestry. Regular mesh grids were set up in these areas with 64 sample points spaced at 10 m from each other. At these points, we determined the particle size composition, soil resistance to penetration, moisture, soil bulk density and particle density, macroporosity, microporosity, total porosity, and aggregate stability in water at a depth of 0.00-0.20 m. Descriptive and geostatistical analyses were performed. The sample density requirements were lower in the pasture area but higher in the forest. We concluded that managed-environments had differences in their soil physical properties compared to the natural forest; notably, the soil in the ADE environment is physically improved in relation to the others. The physical properties evaluated showed a structure of spatial dependence with a slight variability of the forest compared to the others. The use of the range parameter of the semivariogram analysis proved to be effective in determining an ideal sample density.

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