Precompression stress in response to water content and bulk density under no-till Oxisols in southern Brazil

Mendonça, Edwardo A. S.; Lima, Renato Paiva de; Dantas, Daniel da C.; Batista, Pedro Henrique Dias; Giarola, Neyde Fabíola Balarezo; Rolim, Mário M.

doi:10.1016/j.geodrs.2020.e00261

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…Based on Pimentel-Gomes and Garcia [49], the coefficient of variation was high (between 20 and 30%) and very high (larger than 30%) for two-times grazing and low (smaller than 10%) and medium (between 10 and 20%) for three-times grazing (Table 2). Soil moisture is an important variable in the compaction process and soil compression behavior [23,24,[27][28][29][30][31], because it acts as a lubricant for solid particles, belonging to the easier rearrangement of soil particles [26,50], suggesting that controlling soil moisture is a key factor in mechanized operations and animal trampling [24,51] to avoid additional compaction and maintain the soil structure.…”

Section: Resultsmentioning

confidence: 99%

“…From the knowledge of the precompression stress and compression index, and their existing relationship with moisture and bulk density [23,24,[26][27][28][29][30][31], the soil and the traffic of machinery and animals trampling can be managed in order to avoid additional compaction. Soil bulk density is a good indicator of compaction [8], and some authors have verified a relationship between precompression stress and/or compression index with bulk density [23,24,26,29,32,33].…”

Section: Introductionmentioning

confidence: 99%

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Compressibility of a Cambisol Submitted to Periods of Rotational Grazing and Strategies to Avoid Additional Soil Compaction

Suzuki,

Bitencourt Junior,

Pauletto

et al. 2023

Conservation

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Soil compaction is one of the main causes of soil degradation, and some parameters have been used to characterize it, like those related to compressibility and the degree of compactness. To evaluate the rotational grazing time during winter and the presence and absence of grazing, on the compressibility and degree of compactness of a Cambisol, an experiment was installed and consisted of corn planting for silage, a fallow and pasture planting period, with two treatments evaluating the amount of rotational grazing (two and three times in a period of, respectively, 2 and 3 months), subdivided into the presence and absence of dairy cattle grazing. The mean bulk density value of 1.47 Mg/m3 separates the occurrence (plastic deformation) or not (elastic deformation) of additional soil compaction, while the traffic of machinery and animal trampling should occur with soil moisture lower than 0.23 kg/kg, when the soil has a larger load-bearing capacity. For the conservation of soil structure, our study recommends the permanence of cattle in the plots for 30 to 40 min/day and an exit when the pasture height is 0.07 to 0.10 m, with two or three grazing in a period of, respectively, 2 and 3 months.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compressibility of a Cambisol Submitted to Periods of Rotational Grazing and Strategies to Avoid Additional Soil Compaction

Suzuki,

Bitencourt Junior,

Pauletto

et al. 2023

Conservation

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“…Soil precompression stress, representing the critical stress (i.e., strength) of a soil ( 64 ), was estimated from soil texture, bulk density, and soil matric suction using data and pedotransfer functions from eight studies ( 25 , 48 , 65 – 70 ) ( SI Appendix , section 5 ). For Fig.…”

Section: Methodsmentioning

confidence: 99%

Farm vehicles approaching weights of sauropods exceed safe mechanical limits for soil functioning

Keller

2022

Proc. Natl. Acad. Sci. U.S.A.

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Significance Mechanization has transformed agriculture over the past century, greatly improving crop production efficiency. However, the higher capacity has resulted in increased farm vehicle weights. We show that while machinery design maintains constant surface contact stresses, an insidious and largely overlooked threat of subsoil compaction has developed. We demonstrate that modern vehicles induce high soil stresses that now exceed critical mechanical thresholds for many arable soils, inducing chronic soil compaction in root zones below tillage depths and adversely affecting soil functioning. We draw parallels between modern farm vehicles and the heaviest animals that walked Earth: sauropods. We hypothesize that these prehistoric giants may have induced subsoil compaction, thus presenting a paradox for productivity of the land that supported them.

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“…The increase in soil moisture tended to reduce the impacts of compaction on inter-pore and intra-pore spaces, while high compaction altered pore size distribution considerably [23]. σ p significantly increased with an increase in soil water suction (SWS) over the 10-3000 kPa range [24], while SWS over the 6-100 kPa range significantly influenced C c and D c [16]. On the contrary, according to Imhoff et al [20], SOM and soil water content do not affect C c over the range of 10-100 kPa suction.…”

Section: Introductionmentioning

confidence: 99%

Soil Compressibility and Resilience Based on Uniaxial Compression Loading Test in Response to Soil Water Suction and Soil Organic Matter Content in Northeast China

Zhang

et al. 2022

Sustainability

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Due to the widespread use of heavy machinery, improper soil tillage practices, and insufficient soil organic materials input, soil compaction has become a major issue affecting soil function in modern agriculture and the sustainability of the environment. The aim of the present study was to evaluate the responses of soil mechanical parameters to soil water content and soil organic matter content (SOM), and to investigate the physical properties of nine disturbed soils in a black soil region in Northeast China. The soil samples were capillary saturated and subjected to 6, 10, 100, 600, and 800 kPa soil water suction (SWS), and pre-compression stress (σp), compression index (Cc), and decompression index (Dc) were measured. SWS and SOM, and their interaction, significantly influenced the mechanical parameters. σp increased with an increase in SWS until 600 kPa, while Dc exhibited an opposite trend with an increase in SWS. Cc had a peak value at SWS of 100 kPa. All mechanical parameter values were higher under high SOM than under low SOM. σp, Cc, and Dc were influenced variably by different soil physicochemical factors. Structural equation modeling results revealed that soil mechanical parameters were directly and indirectly influenced by soil texture and mean weight diameter of aggregates, in addition to SOM and SWS. According to the results of the present study, based on soil mechanical and physical properties, increasing SOM and ensuring suitable soil water content during tillage could be applied as management strategies to minimize further soil compaction and improve soil resilience, and thus promote the sustainable development of agriculture in Northeast China.

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Precompression stress in response to water content and bulk density under no-till Oxisols in southern Brazil

Cited by 6 publications

References 26 publications

Compressibility of a Cambisol Submitted to Periods of Rotational Grazing and Strategies to Avoid Additional Soil Compaction

Compressibility of a Cambisol Submitted to Periods of Rotational Grazing and Strategies to Avoid Additional Soil Compaction

Farm vehicles approaching weights of sauropods exceed safe mechanical limits for soil functioning

Soil Compressibility and Resilience Based on Uniaxial Compression Loading Test in Response to Soil Water Suction and Soil Organic Matter Content in Northeast China

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