Spatial patterns of preconsolidation pressure and soil moisture along transects in two directions under coffee

Gontijo, Ivoney; Dias, Moacir de Souza; Guimarães, Paulo Tácito Gontíjo; Oliveira, Marcelo Silva de; Ajayi, Ayodele Ebenezer

doi:10.1590/s0100-06832011000400012

Cited by 4 publications

(7 citation statements)

References 19 publications

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“…Junior et al (1999) that show the preconsolidation pressure behavior with water-holding capacity. The preconsolidation values were higher in drier soil and, consequently, the load-bearing capacity as well (Gontijo et al, 2011). Natural forest and no-tillage versus sheep grazing models are statistically different (Table 1), and the indices indicated superiority of the sheep grazing system.…”

Section: Resultsmentioning

confidence: 94%

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Compressiblity and Penetrability of Latossolo Vermelho-Amarelo Distrófico (Oxisol) Under Varied Management Systems and Land Uses

Júnior

Rocha

Pires

et al. 2015

Rev. Bras. Ciênc. Solo

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Soil compaction is one of the main degradation causes, provoked by inappropriate agricultural practices that override the limitations of the soil physical properties. Preconsolidation pressure and penetration resistance have proved effective as alternative to assess and identify soil compaction. Based on the interpretation of these physico-mechanical parameters, compaction can be prevented with a better adjusted soil management. This study was performed to generate preconsolidation pressure and penetration resistance models for Latososlo Vermelho-Amarelo distrófico (Oxisol) under various managements and uses; and evaluate which of these would lead to degradation or degradation susceptibility. The study was carried out in Curvelo, MG. Two managements and one land use were evaluated: no-tillage, sheep grazing and natural forest. Undisturbed soil samples collected from the 0-5 cm layer were subjected to uniaxial compression and penetration resistance tests. Preconsolidation pressure models for forest and no-tillage soils were not statistically different, demonstrating a low degradation potential in no-tillage systems. Preconsolidation pressure was higher in soil under sheep grazing at all water retention tensions and penetration resistance values were higher than under native forest indicating animal trampling as a potential degradation factor. Neither management presented penetration resistance values above 2 MPa at field

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Section: Resultsmentioning

confidence: 94%

“…Gontijo et al (2011) published results that show that preconsolidation pressure is inversely proportional to soil moisture.…”

Section: Introductionmentioning

confidence: 99%

Compressiblity and Penetrability of Latossolo Vermelho-Amarelo Distrófico (Oxisol) Under Varied Management Systems and Land Uses

Júnior

Rocha

Pires

et al. 2015

Rev. Bras. Ciênc. Solo

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“…The application of modern farming and harvesting techniques in coffee culture has increased vulnerability to land degradation and this poses a serious challenge to long-term productivity of the farms. Some mechanical properties of the soil are altered and the dynamic balance of this natural resource is affected (GONTIJO et al, 2011). Moreover, the use of heavier agricultural machinery in most of the production stages without adequate control of applied pressure, vis-a-vis soil moisture, is known to promote the degradation of soil structure and could reduce crop yield (ARAÚJO JÚNIOR et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…The application of pressure lower than the σp to the soil causes an elastic (recoverable) deformation, but when the pressure applied to the soil is higher than the σp, irrecoverable plastic deformation of the soil structure occurs (SILVA et al, 2016). Consequently, σp has been used by several authors as an indicator of sustainability of soil structure under varying load-bearing conditions (GONTIJO et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Spatial variability of precompression stress and volumetric water content of a red-yellow latosol (Oxisol)

et al. 2020

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The intensive agricultural machinery traffic to which soils under coffee crops are exposed may cause significant changes in soil structure. The goals of this study were to: a) characterize the spatial variability of precompression stress (σp) and volumetric water content (θ) of a Red-Yellow Latosol (Oxisol) and determine their spatially dependent structures using ordinary kriging semivariograms; b) using this date to construct a load-bearing capacity (LBC) map for the site, identifying the depth with higher ; and c) use the map as a decision support tool regarding agricultural machinery logistic management in coffee plantations. The research was conducted on an experimental farm of the Agricultural Research Company of Minas Gerais (Epamig), Patrocinio, MG, on a clayey Oxisol. Samples were collected from 2.0 × 1.5 m sampling pits at intersections of a rectangular 40 × 150 m grid, totaling 28 sampling points. The soil samples were collected with metal rings (0.0254 m in height and 0.0630 m in diameter) using an Uhland sampler. Sampling at each pit was at 3 layers: 0.00–0.03 m, 0.10–0.13 m, and 0.25–0.28 m, and seven samples arranged in a matrix form were collected at each layer, totaling 588 samples. The σp and θ showed a spatially dependent structure. The depth of 0.00–0.03 m showed higher LBC, indicating that this depth was more compacted compared to other depths. Based on the σp maps, the tractor and the combine should not traffic into the areas at water content of 0.45 m3 m-3, because the soil has a LBC of 200 kPa. If this condition is not respected, additional compaction will occur. Tractor traffic is permissible when the water content reaches values less than 0.36 m3 m-3, whereas for combine traffic, the water content values must be less than 0.30 m3 m-3.

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“…Métodos geoestatísticos têm recebido considerável atenção das ciências agrárias nos últimos anos, sendo utilizada para quantificar a variabilidade espacial em diferentes atributos do solo (GONTIJO et al, 2011). Segundo Silva et al, (2007), a aplicação da agricultura de precisão na cultura do cafeeiro ainda não é uma realidade na agricultura brasileira, uma vez que existem poucos trabalhos sendo desenvolvidos nessa área.…”

Section: Introductionunclassified

Variabilidade Espacial dos Atributos do Solo Relacionado à Acidez em Uma Argissolo Amarelo

Oliveira¹,

Santos²,

Gonitjo³

et al. 2015

Anais Do IV Simpósio De Geoestatística Aplicada Em Ciências Agrárias

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Si im mp pó ós si io o d de e G Ge eo oe es st ta at tí ís st ti ic ca a A Ap pl li ic ca ad da a e em m C Ci iê ên nc ci ia as s A Ag gr rá ár ri ia as s1 14 4 e e 1 15 5 d de e M Ma ai io o d de e 2 20 01 15Resumo -Os sistemas agroflorestais podem viabilizar o cultivo do café através dos princípios do manejo sustentado dos ecossistemas. Objetivou-se no presente trabalho descrever a variabilidade espacial dos atributos do solo relacionados a acidez (Al, H+Al, MO e pH do solo), em uma lavoura consorciada de café conilon (Coffea canephora) -seringueira (Hevea brasiliensis). Conduziu-se o experimento em uma lavoura de café conilon consorciada com seringueira, no município de Nova Venécia, norte do estado do Espírito Santo, demarcou-se, uma malha quadrangular de 24 x 63 m (1.512 m 2 ) com 60 pontos, foram coletadas quatro subamostras de solo na projeção da copa do cafeeiro em cada um dos pontos cardeais, formando uma amostra composta, na profundidade de 0-0,20m, para obtenção de dados referentes à fertilidade do solo (alumínio, acidez potencial, matéria orgânica e pH do solo). Os dados foram submetidos à análise geoestatística. Verifica-se estrutura de dependência espacial para todos os atributos estudados, com índice de dependência espacial forte e moderado. O conhecimento da variabilidade espacial dos atributos químicos do solo pode ser usado para o desenvolvimento de estratégias de manejo de aplicação de insumos agrícolas.Palavras-chave: geoestatística; atributos químicos; distribuição espacial. SPATIAL VARIABILITY OF SOIL ATTRIBUTES RELATED TO THE ACIDITY IN A YELLOW ARGISOILAbstract -The agroforestry systems can enable the cultivation of coffee through the principles of sustainable management of ecosystems. The objective of this study was to describe the spatial variability of soil attributes related to acidity (Al, H + Al, MO and soil pH) in a coffee conilon (Coffea canephora) crop intercropped with rubber (Hevea brasiliensis). The experiment was conducted in a coffee conilon crop intercropped with rubber tree, in Nova Venécia, northern state of Espírito Santo, Brazil. The experimental area has dimensions of 24 x 63m (1.512m2), where we marked a grid of 60 sampling points. At each sample point were collected four replicates of soil in the projection of the coffee canopy, forming a sample at a depth of 0-0.20 m, to obtain data on soil fertility (aluminum, potential acidity, organic matter and soil pH). The data were submitted to geostatistical analysis. All attributes in study showed spatial dependence structure, with index spatial dependence strong and moderate. Knowledge of the spatial variability of soil chemical properties can be used to develop application management strategies agricultural input.

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Spatial patterns of preconsolidation pressure and soil moisture along transects in two directions under coffee

Cited by 4 publications

References 19 publications

Compressiblity and Penetrability of Latossolo Vermelho-Amarelo Distrófico (Oxisol) Under Varied Management Systems and Land Uses

Compressiblity and Penetrability of Latossolo Vermelho-Amarelo Distrófico (Oxisol) Under Varied Management Systems and Land Uses

Spatial variability of precompression stress and volumetric water content of a red-yellow latosol (Oxisol)

Variabilidade Espacial dos Atributos do Solo Relacionado à Acidez em Uma Argissolo Amarelo

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