SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Tavanti,Renan F. R.; Freddi,Onã da S.; Tavanti,Tauan R.; Rigotti,Adriel; Magalhães,Wellington de A..

ABSTRACT The least limiting water range (LLWR) is a soil physical quality indicator that receives much attention. It has been criticized and put to the test regarding mathematical models that compose it since they describe the behavior of soil physical attributes in a simplified way. This study aimed to assess the efficiency of some pedofunctions proposed in the literature and artificial neural networks on the accuracy in predicting soil water retention at potentials equivalent to field capacity (θFC) and permanent wilting point (θPWP). In other words, to apply the best models to LLWR of two soil types (Oxisol and Ultisol) and verify changes in their structure. The results indicated that pedofunctions using sand, silt, clay, bulk density, and soil organic...

AGRONOMICAL ATTRIBUTES OF SOYBEANS AND SOIL RESISTANCE TO PENETRATION IN NO-TILLAGE AND CHISELED SURFACES

Palavras-chave: Soil physics; Soil physical quality indicator; Available water; Pedotransfer functions; Artificial neural networks.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400444

Cortez,Jorge W.; Mauad,Munir; Souza,Luiz C. F. de; Rufino,Mauricio V.; Souza,Paulo H. N. de.

ABSTRACT Farming systems may affect soil properties and crop production of components, decreasing yields. This study aimed to assess penetration resistance (PR) and agronomic traits of soybeans under no-tillage (NT) and chiseling (CP). The experiment was carried out in a randomized block with two treatments (tillage and scarification) with 12 repetitions; yet soil penetration resistance (PR) was assessed in a factorial block, considering farming systems and sampling sites (row and interrows). PR was measured with an impact penetrometer, sampling in row and interrows within a 22.5 x 0.1 m2 mesh grid up to 0.60 m depth. The obtained values were higher for NT in the 0.10-0.20 m layer. Great PR values in interrows were only registered within the surface layer....

RESISTANCE OF A RED LATOSOL TO PENETRATION: COMPARISON OF PENETROMETERS, MODEL ADJUSTMENT, AND SOIL WATER CONTENT CORRECTION

Palavras-chave: Compaction; Soil physics; Chiseling.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000100098

Duarte,Thiago F.; Silva,Tonny J. A. da; Bonfim-Silva,Edna M.; Fenner,Willian.

ABSTRACT Penetration resistance can be determined directly in the field or in the laboratory. However, data obtained using the two methods are not directly comparable. Considering soil moisture influences penetration resistance, penetration resistance data obtained using the two methods can be corrected based on common moisture values. To enable comparison of the data, the measured data should be adjusted using mathematical models. Consequently, the objective of the present study was to compare soil penetration resistance values measured in a Red Latosol using a static penetrometer and a bench-top electronic penetrometer. The comparison was carried out using samples collected from different soil layers, based on moisture levels ranging from 0.15 to 0.28 kg...

Use of penetrometers in agriculture: a review

Palavras-chave: Soil physics; Soil mechanical; Soil compaction; Modeling.

Ano: 2020

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400462

Moraes,Moacir T. de; Silva,Vanderlei R. da; Zwirtes,Anderson L.; Carlesso,Reimar.

Soil physical quality can be easily and quickly evaluated by using simple equipment to identify levels of soil compaction. Hence, it is necessary to know the variables responsible for changes in the soil penetration resistance (SPR). The aim of this review is to identify the main factors related to the various equipment used for assessing SPR as a soil physical quality indicator in agriculture. This literature review describes the different types of equipment used and its relationship with SPR. A wide range of procedures, devices, and equipments are available. Much of variability in SPR results is related to the equipment model, cone angle and diameter, and penetration rate. Usually, restrictions to root growth are correlated with SPR values above 2-3 MPa....

APPLICABILITY OF FINGERPRINTING FOR IDENTIFICATION OF SEDIMENT SOURCES IN A MESOSCALE SEMIARID CATCHMENT

Palavras-chave: Soil compaction; Soil physics; Physical quality; Penetrometry.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000100019

Silva,Eveline M. R. da; Medeiros,Pedro; Araújo,José C. de.

ABSTRACT The study aimed at identifying sediment sources in a mesoscale catchment (933 km2) located in the Brazilian semiarid region. The research explored the potential of using a fingerprinting technique to verify the origin of eroded sediments in a catchment by comparing physical and mineralogical properties of potential sediment sources and sediments deposited in a pond (6 × 103 m3 storage capacity) and a reservoir (20 × 106 m3 storage capacity). The goal was to assess the feasibility of using such material to identify sediment sources in a semiarid environment with a high density of surface reservoirs. Chemical variables were studied by mineralogical analysis using scanning electron microscopy (SEM) and multivariate statistics. The results showed that...

Manual de métodos de análise de solo.

Palavras-chave: Sediment dynamics; Soil physics; Soil mineralogy; Semiarid.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000400553

Avaliação de métodos de determinação da densidade de solo em amostras com diferentes atividades da fração argila coletadas no município de Rio Branco, estado do Acre.

TEIXEIRA, P. C.; DONAGEMMA, G. K.; FONTANA, A.; TEIXEIRA, W. G..

Análises físicas; Análises químicas; Análises da matéria orgânica; Análises mineralógicas; Análises micromorfológicas.

Tipo: Livro técnico (INFOTECA-E)

Palavras-chave: Análise micromorfológica; Análise do solo; Física do solo; Química do solo; Matéria orgânica; Mineralogia; Soil analysis; Soil physics; Soil chemistry; Soil organic matter; Mineralogy; Soil micromorphology.

Ano: 2017

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1085209

SILVA, L. M. da; COSTA, R. de K. do N.; ALMEIDA, A. S. de; OLIVEIRA, C. H. A. de; ARAÚJO, E. A. de; TAVARES, O. C. H.; PEREIRA, M. G.; SANTOS, O. A. Q. dos.

No Acre, uma das características marcantes dos solos é a presença de minerais de argila do tipo 2:1, que confere padrões diferenciados de consistência em função do conteúdo de água. Esse comportamento implica em dificuldades no processo de amostragem e na avaliação de atributos físicos do solo, com destaque para a densidade do solo (Ds), atributo de grande relevância na avaliação do grau de compactação ou adensamento e componente do cálculo do estoque de nutrientes e carbono orgânico do solo. O objetivo deste estudo foi avaliar os métodos do anel volumétrico e do torrão parafinado na determinação da Ds em solos que apresentam argilas 2:1, em comparação a um solo de natureza caulinítica e oxídica, em horizontes superficiais e subsuperficiais. Não foi...

Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)

Palavras-chave: Densidade do solo; Método do torrão parafinado; Método do anel volumétrico; Paraffin clod method; Volumetric ring method; Fìsica del suelo; Análisis del suelo; Minerales arcillosos; Densidad del suelo; Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Física do Solo; Análise do Solo; Argila; Soil physics; Soil analysis; Soil density; Clay minerals.

Ano: 2020

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1126449

Massa de raízes e a qualidade física do solo em sistemas contínuos e integrados de lavoura-pecuária.

Água disponível do solo: algumas características físicas do solo importantes para quantificação.

CORNÉLIO, G. B.; RATKE, R. F.; MARCHÃO, R. L.; SANTOS JUNIOR, J. D. G.; VILELA, L.; SÁ, M. A. C..

bitstream/item/78264/1/p2009-075.pdf

Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)

Palavras-chave: Sistema Lavoura-pecuária; Qualidade do solo; Integrated crop-livestock.; Física do Solo; Raiz; Solo.; Soil physics; Soil quality..

Ano: 2009

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/748014

PEQUENO, P. L. de L.; LEONIDAS, F. das C.; MENDES, A. M.; VIEIRA, A. H.; MARTINS, E. P.; VASCONCELOS, L. P. de.

O recurso natural solo pode ser definido como um corpo natural, sintetizado em forma de perfil, composto de uma mistura variável de minerais, divididos em pedaços e desintegrados e de matéria orgânica em decomposição, que cobre a terra em uma camada fina e que fornece, quando contém, as quantidades necessárias de ar e de água, amparo mecânico e em parte, subsistência para os vegetais. De uma maneira geral, os solos minerais apresentam quatro componentes principais: substâncias minerais (45%), matéria orgânica (5%), água (25%) e ar (25%). Encontrado-se, sobretudo, num estado realmente adiantado de subdivisão e intimamente misturados. Dentre as propriedades físicas do solo, a textura e a estrutura são de grande importância. A textura diz respeito ao tamanho...

Tipo: Documentos (INFOTECA-E)

Palavras-chave: Água; Física do Solo; Umidade do Solo; Soil physics; Soil water.

Ano: 2002

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/703805

Caracterização físico-hídrica de latossolo amarelo da região de Capitão Poço, Pará.

COSTA, M. P. da; TEIXEIRA, L. B..

bitstream/item/42255/1/Boletim-Pesquisa-133-CPATU.pdf

Tipo: Séries anteriores (INFOTECA-E)

Palavras-chave: Densidade aparente; Capitao Poco; Pará; Brasil; Oxysol; Organic mather; Analysis.; Análise; Água; Argila; Física; Matéria Orgânica; Latossolo Amarelo; Porosidade; Solo.; Amazonia; Bulk density; Clay; Porosity; Soil physics; Water..

Ano: 1992

URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380484

Soil Water Balance in the Sudano-Sahelian Zone

Open Agri

Palavras-chave: Water balance; Soil water; Hydrology; Meteorology; Agrometeorology; Soil physics; Transpiration (animals); Land management; Runoff; Participation.

Ano: 1992

URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4100

Atributos físicos e estoques de carbono do solo sob diferentes usos da terra em Rondônia, Amazônia Sul-Ocidental

PFB - Pesquisa Florestal Brasileira

Mascarenhas, Adriano Reis Prazeres; Volpato Sccoti, Marta Silvana; Melo, Rafael Rodolfo; Corrêa, Fernando Luíz de Oliveira; de Souza, Emanuel Fernando Maia; Andrade, Reginaldo Almeida; Bergamin, Anderson Cristian; Müller, Manfred Willy.

Objetivou-se estudar o comportamento dos atributos físicos e dos teores e estoques de carbono do solo em sistema agroflorestal multiestratificado (SAF), comparativamente a diferentes modalidades de uso solo, sendo elas o cultivo de cacaueiro sob manejo agroecológico (CAC), pastagem cultivada (PAS) e floresta nativa (FLN). A área de estudo localiza-se na estação experimental da CEPLAC em Ouro do Preto do Oeste, RO. Nos quatro tratamentos foram instaladas, ao acaso, cinco parcelas de 20 m x 30 m. Nessas parcelas, foram coletadas amostras de solo indeformadas e deformadas nas profundidades de 0 a 20 cm e 20 a 40 cm, para determinação dos atributos fiscos e estoque de carbono no solo. Os valores de densidade do solo no SAF, CAC e PAS apresentaram-se elevados e...

Soil properties and variability of tracheid dimensions and wood density in Pinus caribaea var. hondurensis

Palavras-chave: Recursos Florestais Qualidade Ambiental Agroecossistema; Física do solo; Sustentabilidade Agroecosystems; Soil physics; Sustainability.

Ano: 2017

URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1295

PFB - Pesquisa Florestal Brasileira

Corrêa, Robson Schaff; Bellote, Antonio Francisco Jurado.

The understanding of wood quality in relation to different forest sites is of fundamental relevance in current timber market. There are only few studies available concerning soil and wood quality of tropical pinots. So, the goal of this work was to characterize tracheid dimensions and wood density of Pinus caribaea var. hondurensis, correlating these variables with soil properties at different sites. Discs were taken at 1.3 m height and comprised two radial samples in each of the four dominant trees removed at four different sites. Measurements for wood density were made from the third to the eleventh year old rings, and the measurement of tracheid dimensions were made in the fourth, eighth and eleventh year sold rings. The soil, collected in the canopy...

Correlation of soil properties with weed ocurrence in sugarcane areas

Palavras-chave: Soil fertility; Soil physics; Silviculture; Tropical pines; Wood anatomy; Wood quality Fertilidade do solo; Física do solo; Silvicultura; Pinheiros tropicais; Anatomia da madeira; Qualidade da madeira.

Ano: 2011

URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/195

Planta Daninha

Lousada,L.L.; Freitas,S.P.; Marciano,C.R.; Esteves,B.S.; Muniz,R.A.; Siqueira,D.P..

Soil properties can influence weed community composition and weed density agricultural area. Knowing this relationship would allow to choose the best strategy for the control of such plants. This study aimed to investigate the correlation between weed density and chemical and physical attributes of soil in three areas (UCO, USC, and UPA) for commercial sugarcane cultivation in Campos dos Goytacazes, RJ. Grids of 40 m x 40 m were established in the areas, and soil samples were collected at the intersection points for physical and chemical analysis and evaluation of the soil seed bank (SSB), followed by a phyto-sociological survey of the weeds present. Samples were collected during two periods: February/March and June/July, 2010. SSB presented the greatest...

Numerical modeling of the effect of variation of boundary conditions on vadose zone hydraulic properties

Palavras-chave: Soil physics; Soil chemistry; Seed bank; Phyto-sociological survey.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000400002

Leão,Tairone Paiva; Gentry,Randall.

An accurate estimation of hydraulic fluxes in the vadose zone is essential for the prediction of water, nutrient and contaminant transport in natural systems. The objective of this study was to simulate the effect of variation of boundary conditions on the estimation of hydraulic properties (i.e. water content, effective unsaturated hydraulic conductivity and hydraulic flux) in a one-dimensional unsaturated flow model domain. Unsaturated one-dimensional vertical water flow was simulated in a pure phase clay loam profile and in clay loam interlayered with silt loam distributed according to the third iteration of the Cantor Bar fractal object Simulations were performed using the numerical model Hydrus 1D. The upper and lower pressure heads were varied around...

Tipo: Info:eu-repo/semantics/report

Palavras-chave: Numerical model; Hydrus 1D; Uncertainty; Boundary conditions; Hydraulic conductivity; Soil physics.

Ano: 2011

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000100025

Soil functioning in a toposequence under rainforest in São Paulo, Brazil

Cooper,Miguel; Medeiros,João Carlos; Rosa,Jaqueline Dalla; Soria,José Eduardo; Toma,Raul Shiso.

Studies of soil-water dynamics using toposequences are essential to improve the understanding of soil-water-vegetation relationships. This study assessed the hydro-physical and morphological characteristics of soils of Atlantic Rainforest in the Parque Estadual de Carlos Botelho, state of São Paulo, Brazil. The study area of 10.24 ha (320 x 320 m) was covered by dense tropical rainforest (Atlantic Rainforest). Based on soil maps and topographic maps of the area, a representative transect of the soil in this plot was chosen and five soil trenches were opened to determine morphological properties. To evaluate the soil hydro-physical functioning, soil particle size distribution, bulk density (r), particle density (r s), soil water retention curves (SWRC),...

Modeling water movement in horizontal columns using fractal theory

Palavras-chave: Soil physics; Soil water retention curve; Image analysis.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200010

Leão,Tairone Paiva; Perfect,Edmund.

Fractal mathematics has been used to characterize water and solute transport in porous media and also to characterize and simulate porous media properties. The objective of this study was to evaluate the correlation between the soil infiltration parameters sorptivity (S) and time exponent (n) and the parameters dimension (D) and the Hurst exponent (H). For this purpose, ten horizontal columns with pure (either clay or loam) and heterogeneous porous media (clay and loam distributed in layers in the column) were simulated following the distribution of a deterministic Cantor Bar with fractal dimension H" 0.63. Horizontal water infiltration experiments were then simulated using Hydrus 2D software. The sorptivity (S) and time exponent (n) parameters of the...

Effects of tillage systems on physical properties of a cohesive yellow argisol in the northern state of Espírito Santo, Brazil

Palavras-chave: Numerical modeling; Hydrus 2D; Fractal model; Cantor bar; Sorptivity; Soil physics.

Ano: 2010

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400042

Zuffo,Valmir José; Pires,Fabio Ribeiro; Bonomo,Robson; Vitória,Edney Leandro da; Celin Filho,Ademar; Santos,Eduardo Oliveira de Jesus.

Tillage systems are a key element of the technology of crop production, both with a view to crop yield and from the perspective of soil conservation and sustainability of the production system. The aim of this paper was to evaluate the effects of five tillage systems on the physical properties of a cohesive Yellow Argisol. The experiment was installed in the field on January 21, 2011 and lasted 260 days, in an area previously used as pasture with Brachiaria grass without liming or fertilization, but irrigated by a low pressure spray system. The treatments, in five replications and in a randomized block design, consisted of: 1) disk plow (twice) + disk harrow + ridge-furrow tillage (raising a ridge along the planting row), 135 days after transplanting (DP +...