Direct and indirect effects of microorganisms on technetium insolubilization in water covering waterlogged soils were studied. Seven soils were waterlogged and then the water covering the soils were collected for further tracer experiments. The samples in contact with air were incubated with TcO4 at 25 ̊C for 4 to 5 days. After incubation, the samples were sequentially separated into four fracti...

Aquatic nematode-trapping hyphomycetes have rarely been studied. The current study examined 1000 waterlogged soil samples in order to systematically investigate resources of aquatic nematode-trapping hyphomycetes and to compare species diversity and community similarities in polluted and unpolluted aquatic environments. Many nematode-trapping hyphomycetes live in shallow freshwater (at a water ...

Since uncharred seeds recovered from archaeological deposits may be modern intrusions, researchers must evaluate each uncharred seed assemblage before assigning archaeological significance to it. When depositional circumstances are established, seed remains can yield primary data about diet, farming practices, and the spread of imported cultigens. Three uncharred seed assemblages are evaluated—...

As in many fen land regions in East Germany, long-standing intensive arable farming--enabled by reclamation--has caused soil deterioration and high water runoff in the Schraden region. The more than ten years of economic and political transformation that followed the breakdown of the socialist regime has worsened the situation and even added new problems. The visible consequences are droughts i...

Waterlogging and salinization arise in arid areas largely because two essential resources, irrigation water and the assimilative capacity of unconfined aquifers, are not priced or allocated correctly to reflect scarcity values and opportunity costs. Farm-level and project-level models of crop production are examined to identify policies that will encourage farmers to consider opportunity costs ...

More than one third of the world’s irrigated areas suffer occasional or more frequent waterlogging (Donmann and Houston, 1967). Waterlogging has been shown to limit wheat yields in many regions of the world; an area estimated at 10 million ha is waterlogged each year in developing countries (Sayre et al., 1994). Waterlogging occurs when rainfall or irrigation water collects on the soil surface ...

In humid climates, waterlogging from excessive rainfalls can be a major limiting factor for soybean production, particularly during the reproductive stage. However, there is limited understanding of how growth and physiology respond to this critical Here, we investigated effects subsequent reoxygenation on growth, physiology, yields, leaf hyperspectral reflectance traits cultivar ‘Asgrow AG5332...