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Displaying 616 - 620 of 1605Mercury in European agricultural and grazing land soils
Agricultural (Ap, Aₚ-horizon, 0–20cm) and grazing land soil samples (Gr, 0–10cm) were collected from a large part of Europe (33 countries, 5.6million km²) at an average density of 1sample site/2500km². The resulting more than 2×2000 soil samples were air dried, sieved to
Pan-European distribution modelling of stream riparian zones based on multi-source Earth Observation data
Freshwater ecosystems are among the most degraded and threatened globally. A need for systematic assessment of riverine habitats is thus well-documented. Riparian zones are especially important due to the large array of ecosystem and social services they can provide, while also recently gaining a major role in the new European biodiversity policy. In this context, the necessity to gather spatial information on extent, distribution and characteristics of the riparian zones is clear.
Yield and water consumption characteristics of wheat/maize intercropping with reduced tillage in an Oasis region
Higher irrigation quota for conventional farming causes substantial conflicts between water supply and demand in agriculture, and wind erosion near soil surface is one of the major causes of farmland degradation and desertification in arid areas. This research investigated the effect of the amounts of irrigation in combination with tillage practices on soil evaporation (E), water consumption (ET) characteristics, and grain yield performance and water use efficiency (WUE) for wheat (Triticum aestivum L.) intercropped with maize (Zea mays L.) in strip planting in an Oasis region.
Integration of groundwater information into decision making for regional planning: A portrait for North America
Groundwater is widely used as a source of drinking water in North America. However, it can be contaminated by microbial or chemical agents potentially hazardous to human health. In recent decades, governments have developed better knowledge of groundwater and established measures to protect and preserve the resource. Several studies have shown that relevant information on groundwater might prove very useful for regional planning purposes.
Expansion to abandoned agricultural land forms an integral part of silver fir dynamics
Silver fir (Abies alba Mill.) is a tree species distributed mainly in central Europe. It once was a dominant tree species within some forests of this region. The causes for its rapid decline in the past two centuries have not yet been sufficiently explained. It is argued that human activities have been largely responsible for expansions and contractions of silver fir populations. On the basis of the current distribution of silver fir, historical maps and palaeoecological data, we describe the expansion of silver fir forests.