Results 21 to 30 of about 104,289 (262)

Characterization of Microstructures in Lacustrine Organic-Rich Shale Using Micro-CT Images: Qingshankou Formation in Songliao Basin

open access: yesEnergies, 2022
In order to explore the development characteristics and influencing factors of microscale pores in lacustrine organic-rich muddy shale, this study selected five shale samples with different mineral compositions from the Qingshankou Formation in the ...
Yan Cao, Qi Wu, Zhijun Jin, Rukai Zhu
doaj   +1 more source

Variations in selected soil physical properties with landforms and slope within an inland valley ecosystem in Ashanti region of Ghana

open access: yesSoil and Water Research, 2011
One peculiar feature of the inland valleys abundant in West Africa is their site-specific hydrology, underlain mainly by the prevailing landforms and topography.
Sunday E. Obalum   +4 more
doaj   +1 more source

Calculating particle density, bulk density, and total porosity of soil based on its texture

open access: yesSoil Science Annual, 2014
This paper provides the verification of coefficients for the calculation of particle density, bulk density, and total porosity based on the texture of soils proposed by Brogowski (1990).
BROGOWSKI ZYGMUNT   +2 more
doaj   +1 more source

Experimental Investigating of Compaction Effect on Porosity Measurement for Carbonate Rocks

open access: yesIraqi Geological Journal, 2022
Oil and natural gas may be found in commercial reservoirs, porous and easily permeable rocks. Porosity is an essential characteristic of reservoirs. This research focuses on comparing laboratory-measured porosity to log porosity. A comparison of
Ahmed Watten, Mohammed S. Aljwad
doaj   +1 more source

Efeitos de sistemas de produção de grãos envolvendo pastagens sob plantio direto nos atributos físicos de solo e na produtividade Effects of grain production systems including pastures under no-tillage on soil physical properties and yield

open access: yesRevista Brasileira de Ciência do Solo, 2004
A integração da lavoura com a pecuária altera a estrutura do solo, que, por sua vez, interfere nas características físicas na camada superficial. O objetivo deste trabalho foi avaliar os atributos físicos de solo e o rendimento de grãos num Latossolo ...
S. T. Spera   +3 more
doaj   +1 more source

Comparison of the Effects of Different Crop Production Systems on Soil Physico-Chemical Properties and Microbial Activity under Winter Wheat

open access: yesAgronomy, 2020
In many areas, organic crop production systems have been shown to contribute to maintaining good soil condition. The organic production system has been recommended as an alternative to conventional agriculture.
Anna Maria Gajda   +2 more
doaj   +1 more source

Determination of Porosity in Fluidized-Bed Carburized P/M Compacts Using an Image Software Analysis

open access: yesThe Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2021
The aim of this research was to study the porosity in carburizing in fluidized-bed on sintered alloys produced by powder metallurgy route using an image analysis software and to compare the obtained results with the conventional method for porosity ...
Mihaela MARIN, Florin-Bogdan MARIN
doaj   +1 more source

Integração lavoura e pecuária e os atributos físicos de solo manejado sob sistema plantio direto Livestock-crop integration effects on physical attributes of a soil under no-till

open access: yesRevista Brasileira de Ciência do Solo, 2009
Atributos físicos de solo foram avaliados num Latossolo Vermelho distrófico típico, em Passo Fundo, RS, dez anos após o estabelecimento (1993 a 2003) de cinco sistemas de produção integrando culturas produtoras de grãos, pastagens de inverno e ...
Silvio Tulio Spera   +3 more
doaj   +1 more source

Porosity analysis of three types of balsa (Ochroma pyramidale) wood depending on density

open access: yesJournal of Wood Science, 2022
Balsa (Ochroma pyramidale), which is the lowest density wood, is a useful species in various industries. In general, balsa can be divided into three types (low density: LD, middle density: MD, high density: HD).
Eun-Suk Jang, Chun-Won Kang
doaj   +1 more source

MERCURY INTRUSION POROSIMETRY TO EVALUATE THE INCIDENCE OF BIOTURBATION ON POROSITY OF CONTOURITES

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2021
The effect of bioturbation on rocks’ flow-media properties (e.g., porosity and permeability) and its impact on reservoir quality has been previously documented.
FRANCISCO J. RODRÍGUEZ-TOVAR   +2 more
doaj   +1 more source

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