نتایج جستجو برای: silt percent

تعداد نتایج: 100411  

2004
S. S. Ray J. P. Singh Gargi Das Sushma Panigrahy

This present study explores the use high-resolution multi-spectral remote sensing data for generating within-field soil variability map as an inputs required for site-specific management of agriculture. The study was conducted for an experimental plot in Central Potato Research Station of Jalandhar, India. Thirty-five soil samples were collected from the field at regular intervals. The samples ...

Journal: :Evolving Trends in Engineering and Technology 2014

Journal: :Canadian Geotechnical Journal 2022

Microstructure showing the involvement of fine and coarse grains in soil skeleton is evaluated. Incremental loading tests using a stress-dependent permeameter are conducted on mixtures poorly graded sand nonplastic fines originating from tailings. The results compared with published data various It shown that increasing content 0% to 100%, components can be classified into four categories: no (...

2014
C. Bassey

No. of 21 shale, limestone and gypsum samples belonging to the Palaeocene Sokoto Group and 19 sandstone, shale, lignite and gypsum samples from Maastrichtian age the Rima Group of the Sokoto Basin were collected from five traverses across hills and pits, and analyzed for major and trace elements using XRF and AAS analytical techniques. The SiO2/Al2O3 ratio of the Taloka Formation in the Rima Gr...

2014
Tord Johansson

An equation was constructed to estimate the stem volume of Norway spruce (Picea abies (L.) Karst.) in 145 stands growing on former farmland in Sweden (Latitude 56–63° N). The mean total age was 40 ± 13 (range 17–91) years, the mean diameter at breast height (ob) was 15 ± 4 (range 5–27) cm and the mean density was 1621 ± 902 (range 100–7600) stems ha. The equation which fits the data best used t...

Journal: :Recent patents on biotechnology 2016
Reginald B Kogbara Josiah M Ayotamuno Daniel C Worlu Isoteim Fubara-Manuel

BACKGROUND Patents have been granted for a number of techniques for petroleum biodegradation including use of micro-organisms for degradation of hydrocarbon-based substances and for hydrocarbon degradation in oil reservoirs, but there is a dearth of information on hydrocarbon degradation in different soil textures. OBJECTIVE Hence, this work investigated the effects of different soil textures...

2014
Aizhen Liang Shenglong Chen Xiaoping Zhang Xuewen Chen

The combination of isotope trace technique and SOC fractionation allows a better understanding of SOC dynamics. A five-year tillage experiment consisting of no-tillage (NT) and mouldboard plough (MP) was used to study the changes in particle-size SOC fractions and corresponding δ (13)C natural abundance to assess SOC turnover in the 0-20 cm layer of black soils under tillage practices. Compared...

Journal: :Environmental monitoring and assessment 2011
Amar S Musale Dattesh V Desai

Macrobenthic polychaetes play a significant role in marine benthic food chain. A study was carried out to observe the abundance and diversity of soft bottom macrobenthic polychaetes along the South Indian coast, along with observations on sediment characteristics. The present study indicated an increase in the polychaete diversity as compared to earlier reports. Sixty-three different forms of p...

2011
S. BOHN J. GEBERT

Basically, the activity of the methane oxidizing bacteria is limited by the availability of oxygen in the landfill cover soil. Enforced by the use of fine-grained soils like silt, the surface tends to crust due to vertical erosion, blocking pores required for gas exchange. A column study was carried out to examine the impact of vegetation on improving the aeration of critical soil material and ...

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