Determination of soil deformation and strength properties is great importance in geotechnical design. The disturbance that occurred during the sampling from field affects results obtained by laboratory tests. Therefore, lack representation conditions in-situ features with tests leads designers to carry out Standard penetration test (SPT) Menard pressuremeter (PMT) are most widely used which uti...

Dieback of native Eucalyptus largiflorens forests is an increasing problem on the floodplains of the lower River Murray, southern Australia. Salinisation of floodplain soils, as a result of the changed hydrological management of the River Murray, appears to be a primary cause of the dieback. Regulation of the River Murray has reduced the frequency of large flood events by a factor of approximat...

Sorption and degradation are the primary processes controlling the efficacy and runoff contamination risk of agrochemicals. Considering the longevity of biochar in agroecosystems, biochar soil amendment must be carefully evaluated on the basis of the target agrochemical and soil types to achieve agricultural (minimum impact on efficacy) and environmental (minimum runoff contamination) benefits....

This paper presents the results of a series of numerical analysis carried out on piles in cohesive soils. Broms (1964a) proposed graphs to obtain ultimate lateral bearing capacity of such piles. However, the graphs do not cover all piles with different lengths. In this study, a finite difference program that is especially designed for piles is used. The investigations were carried out by varyin...

Soil reagent mixing (SRM) is a remediation technique whereby powder or slurried reagents are delivered and mixed in-situ or ex-situ with contaminated soils or sediments by augers or other types of soil mixers. This paper summarises the work carried out for a laboratory treatability study of SRM on clayey soil samples contaminated with petroleum hydrocarbon compounds from a petrol filling statio...

In clayey, swelling and more or less sodic soils, cultivation and seasonal climatic cycles induce variations in soil moisture which in turn cause variations in the soil structure. In particular, when the soil profile is saturated, some soils become impermeable because the soil porosity value does not remain sufficiently high throughout the drainage period to be effective for water movement. In ...

This work has evaluated the effects of a thermally dried or composted dewatered sewage sludge on glucosidase activity, total (TCH) and extractable (ECH) carbohydrate content, microbial biomass carbon (MBC) and basal respiration (BR) of soils from limestone quarries under laboratory conditions. Two doses (low, L and high, H) of the dewatered sludge (DS), or of the respective thermally dried (TD...

Fine-grained soils, in particular, expansive soils are prone to cracking. For these soils swelling-shrinking potential is quite high and hence they exhibit adverse affect on overall stability of geotechnical structures. This phenomenon may also be responsible for alteration of various engineering properties of soils such as hydraulic conductivity, water and leachate penetration, solute transpor...

Expansive soils are problematic and viewed as a potential hazard for buildings structures due to swell shrink phenomena. The damaging effect of these is strongly correlated with the soil-water characteristics expansive present in shallow depth. seasonal wetting-drying cycle vital fluctuating moisture content surficial soils. As such, remain unsaturated most time high absorption capacity. Theref...

The sunflower (Helianthus annuus L.) is an oleaginous plant that shows high suitability for cultivation in Brazil. However, the performance of crop influenced by factors such as weed interference, mainly because few selective herbicide options. Thus, objective this study was to evaluate control and selectivity four pre-emergent herbicides applied two cultivars sandy clayey soils. Two field expe...