Charophytes possess the capacity to store large amounts of various elements, but until today no studies about known methods of determining CaCO3 and elements in charophytes have been conducted. Because of the large and varying amounts of CaCO3, it is difficult to estimate the actual element content in dry mass. Simple comparisons of elements in charophyte plant tissue or between charophytes and...

abstract a study was conducted to evaluate the effect of incubation time, sewage sludge and clay content on the distribution of nickel and cadmium in different fractions of selected calcareous soils. to meet this purpose, an experiment with two different soils (4 and 30 percent caco3), two different textures (8 and 40 percent clay), two levels of nickel (0 and 100 mg.kg-1), two levels of cadmiu...

Skidding operations can cause considerable and wide spread soil disturbance. The objective of this study was to evaluate the effects of ground skidding operations on soil compaction, moisture content, and total porosity at different levels of slope and traffic frequency. Four levels of traffic intensity (3, 8, 13, and >13 passes of a Crawler Tractor Onezhets ? 110) and three levels of slope ( ...

Understanding and determining soil properties is reflected in improving farm management crop production. Soil salinity, pH calcium carbonate are among the factors affecting soil’s physical chemical properties. Hence, their estimation very important for agricultural management, especially arid regions (Wadi Elkobaneyya valley, located northwest of Aswan Governorate, Upper Egypt). The study objec...

The effect of long term conservation tillage (CT) application on soil organic carbon (SOC) concentration, and on stratification ratios (SR) of SOC, soluble organic carbon (SOCs), microbial biomass carbon (MBC) and protease activity (PA) has been studied. The SR was established dividing values of these variables at 0-5 cm depth by values at 10-25 cm depth. The results were compared with those ob...