The fate of organic herbicides applied to agricultural fields may be affected by other soil amendments, such as copper applied as a fungicide. The effect of copper on the leaching of diuron and glyphosate through a granitic and a calcareous soil was studied in the laboratory using sieved-soil columns. Each soil was enriched with copper sulfate to obtain soil copper concentrations of 125, 250, 5...

1.1 Iron deficiency – The problem Iron (Fe) is an essential micronutrient for plants, humans and other animals. An adequate uptake of Fe is needed to ensure proper growth and development, as well as good health of organisms (Marschner, 1995; Vasconcelos and Grusak, 2007). When provided with insufficient quantities of Fe, organisms will suffer from Fe deficiency symptoms. Fe deficiency is a worl...

Fossilized calcareous structures in chalk collected from exposures of the Selma formation in Alabama yielded organic components comparable to the organic matrices of the calcium carbonate (CaCO3) shells of sea urchin and oyster. The organic matrix of the chalk was composed of 0.05% soluble protein and 0.17% soluble carbohydrate per dry weight. The possible role of the organic matrix as a regula...

The seasonal and spatial dynamics of two groups of macroalgae, drift algae and rhizophytes, commonly found in tropical seagrass meadows were studied. The aim of this study was to provide insight into how freshwater discharges may be altering seagrass-dominated nearshore tropical habitats. Species composition, biomass, and percent cover of macroalgae were collected at six Thalassia testudinum Kö...

Stratigraphic correlations presented here for the ductilely deformed and metamorphosed rocks exposed in the Shadow Mountains indicate that they formed on the North American continental margin and are not exotic or significantly displaced from their site of origin. These strata represent a depositional history that spans Late Proterozoic and Paleozoic passive margin development, late Paleozoic t...

The Upper Jurassic to Lower Cretaceous shallow water platform carbonates of the Northern Calcareous Alps (Plassen Formation, “Lärchberg Formation”) and the resedimented deposits of the latter within basinal series (Barmstein Limestone, Tressenstein Limestone) are currently under re-investigation (SCHLAGINTWEIT et al., 2003; GAWLICK et al., 2005). This shallow water development is directly linke...

Grain-size analysis has long been used as a descriptor of transport and depositional processes. This paper presents the possibility of using image-based granulometries, not yet widely used in the earth sciences, to characterize granulometric composition of unconsolidated estuarine and marine sediments. To test the method, conventional sediment analysis of siliceous and calcareous sediments are ...

ARTICLE INFO ABSTRACTIn the past few decades, accumulation of heavy metals, such as lead (Pb), in soils has increased as a result of human activities.The environmental hazard associated with soil enrichment in heavy metals is related to their mobility and plant availability. Application of various materials such as humic may influence the amount of Pb taken up by plant. Four levels of each of l...

Abstract The intensification of agricultural land-use, abandonment and afforestation have caused severe loss degradation nutrient-poor, semi-natural grasslands across Europe. Calcareous an outstanding value for nature conservation due to their highly diverse flora fauna, including birds. However, knowledge environmental factors driving the composition bird communities in calcareous is still sca...

The overall aim of our research program is to discover the physiological basis of calcium toxicity in Proteaceae plant species that typically inhabit low-phosphorus, acidic soils and avoid calcareous (alkaline) soils. The phenomenon of Ca toxicity has been known for decades, but so far no clear mechanistic explanation is available. We propose that Ca toxicity in P-efficient Proteaceae is the re...