Relações matemáticas entre porosidade drenável e condutividade hidráulica do solo saturado

Ribeiro, Kátia Daniela; Nascimento, João; Gomes, Natalino Martins; Lima, Luiz Antonio; Menezes, Stélio Maia

doi:10.1590/s1415-43662007000600008

Cited by 6 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several reports focused on the estimation of drainable porosity based on soil properties: sand, bulk density, total porosity, organic matter, and water-dispersed clay (Mello et. al., 2007) or on hydraulic conductivity due to water table lowering (Feitoza, 2006;Ribeiro et al, 2007). Within the context of the study subject, soil compaction, Corsini & Ferraudo (1999) developed two expressions to estimate soil bulk density from macroporosity for a Dark Red Latosol.…”

Section: Introductionmentioning

confidence: 99%

Method to estimate soil macroporosity and microporosity based on sand content and bulk density

Stolf

Thurler

Bacchi

et al. 2011

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

SUMMARYMacroporosity is often used in the determination of soil compaction. Reduced macroporosity can lead to poor drainage, low root aeration and soil degradation. The aim of this study was to develop and test different models to estimate macro and microporosity efficiently, using multiple regression. Ten soils were selected within a large range of textures: sand (Sa) 0.07-0.84; silt 0.03-0.24; clay 0.13-0.78 kg kg -1 and subjected to three compaction levels (three bulk densities, BD). granulométricas -areia: 0,07-0,84; silte: 0,03-0,24; e argila: 0,13-0,78 macro = 0,465 Ds + 0,212 areia; micro = 0,337 + 0,294 areia; Pt = 1,082

show abstract

Section: Introductionmentioning

confidence: 99%

Method to estimate soil macroporosity and microporosity based on sand content and bulk density

Stolf

Thurler

Bacchi

et al. 2011

Rev. Bras. Ciênc. Solo

View full text Add to dashboard Cite

show abstract

“…Considering the compilation of equations presented by Ribeiro et al (2007) and using the hydraulic conductivity of the soil of the experimental installation used for the validation of the proposed model, which will be described in the following (k = 1.382 * 10 -5 m/s), the Chossat and Sagnac equation was selected (standard error of the estimate equals to 77.48 and correlation coefficient of 0.97, when compared with experimental data), expressed in Eq. 13:…”

Section: Resultsmentioning

confidence: 99%

Drywells Dimensioning: Analogy Between Water Flow in Soil and Heat Flux in Media Solids

Ferreira¹,

Ilha²

2020

J. Urb. Environ. Engng

View full text Add to dashboard Cite

The drywell is an on-lot drainage system, which is composed by an excavation in the soil lined with a perforated piped and gravel at the bottom and sides. There are many models for on lot systems dimensioning, which were initially developed for agriculture areas or for simulation of water percolation in porous media, thus, they are not fully optimized for small areas like urban lots. This article proposes a model for dimensioning drywells, which is based on physical and hydrological characteristics of the installation site. It was developed using the analogy between water flow in soil and the heat flux in media solids. Results obtained with the proposed model were statistically similar (p>0.05) to those obtained with experimental data.

show abstract

“…Samples were placed in trays to which water was added slowly over three days up to near the sample top, without exceeding it. After saturation, samples presented a superficial water layer, their mass was determined and then they were submitted to tension equivalent to a 0.60-meter water column until the hydrostatic equilibrium was reached (Ribeiro et al, 2007). Samples were weighed again and dried at 105°C for 48 hours for dry mass determination.…”

Section: Methodsmentioning

confidence: 99%

Soil properties and agronomic attributes of potato grown under deep tillage in succession of grass species

et al. 2017

View full text Add to dashboard Cite

Yield and disease incidence were evaluated in potato (Solanum tuberosum, cv. Atlantic) after six years of cultivation in succession with corn (Zea mays, cv. 'AG 6080') under conventional tillage (CT, depth of tillage: 20 cm) or in succession with three grass species [Guinea grass (Panicum maximum, cv. Tanzânia), Palisade grass (Brachiaria brizantha, cv. Marandu) and corn] under deep tillage (DT, depth of tillage: 70 cm). Total tuber yield was higher in DT in average 36% the value obtained in CT (17.76 t/ha), with no effect of the grass species. Common scab (Streptomyces scabies) incidence was influenced by treatments, the highest (16.9%) and the lowest (9.5%) values being obtained in succession with corn and Guinea grass, respectively, both under DT. The lowest incidence of tuber greening at field (2.58%) was also recorded in Guinea DT, significantly lower than obtained in Corn CT (6.33%), possibly due to a more efficient ridging operation. Grass species showed different values of aboveground dry biomass production. Guinea grass (26.56 t/ha) was the most and Corn under CT and DT (5.72 and 5.56 t/ha, respectively, without ears) were the least productive ones. Soil density, macroporosity and resistance to penetration indices were significantly better with DT, the grass species affecting them in a minor degree. The deep tillage system is, therefore, recommended for potato cultivation regardless the grass species used for crop succession.Keywords: Solanum tuberosum, compaction, soil recuperation, crop succession. RESUMOAtributos do solo e da cultura da batata em preparo profundo de solo e sucessão com poáceas A produtividade e a incidência de doenças foram avaliadas na cultura da batata (Solanum tuberosum, cv. Atlantic) após seis anos de cultivo em sucessão com milho (Zea mays, cv. 'AG 6080') sob manejo de solo convencional (CT, profundidade da operação de preparo: 20 cm) ou em sucessão de culturas com três espécies de poácea [capim Tanzânia (Panicum maximum, cv. Tanzânia), capim Marandu (Brachiaria brizantha, cv. Marandu) e milho], sob manejo profundo de solo (DT, profundidade da operação de preparo: 70 cm). A produtividade total em tubérculos para os tratamentos em DT foi, em média, 36% maior em relação ao CT (17,76 t/ha), não havendo efeito da poácea cultivada em sucessão. A incidência de sarna comum (Streptomyces scabies) foi influenciada pelos tratamentos, sendo a mais alta (16,9%) e a mais baixa (9.5%) registradas quando milho e capim Tanzânia, respectivamente, foram utilizados como cultura em sucessão, ambos sob DT. A incidência mais baixa de esverdeamento de tubérculos em campo (2,58%) foi também obtida para sucessão com capim Tanzânia sob DT, significativamente inferior ao valor obtido em milho CT (6,33%), possivelmente devido à maior eficácia da operação de amontoa. As diferentes poáceas apresentaram valores diferentes de produção de biomassa seca de parte aérea. O capim Tanzânia (26,56 t/ha) foi a poácea mais produtiva e o milho sob CT e DT (5,72 e 5,56 t/ha, respectivamente, sem considerar as esp...

show abstract

Relações matemáticas entre porosidade drenável e condutividade hidráulica do solo saturado

Cited by 6 publications

References 4 publications

Method to estimate soil macroporosity and microporosity based on sand content and bulk density

Method to estimate soil macroporosity and microporosity based on sand content and bulk density

Drywells Dimensioning: Analogy Between Water Flow in Soil and Heat Flux in Media Solids

Soil properties and agronomic attributes of potato grown under deep tillage in succession of grass species

Contact Info

Product

Resources

About