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National Repository of Grey Literature 12 records found  previous11 - 12  jump to record: Search took 0.01 seconds. 
Phosphorus mobility in the catchment and methods of its determination.
 RICHTR, Jan
Based on the literature review, this work describes recent knowledge about mobility and behaviour of phosphorus in the catchment and from this point of view evaluates methods of its determination.
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Concentrations and forms of phosphorus in the runoff from small agricultural catchments in the catchment of Orlík Reservoir
 Richtr, J. ; Hejzlar, Josef ; Semančíková, E.
Concentrations of major P forms were monitored in the runoff from 21 small agricultural catchments with dominant arable land or grassland within the basin of Orlík Reservoir during one seasonal cycle. Mean concentrations of dissolved reactive P (DRP) and dissolved non-reactive P (DNP) were low and not differed at the arable land and grassland catchments (DRP 32 and 24 μg/l, DNP 8 and 9 μg/l, respectively). Particulate P (PP) concentrations varied significantly between these two types of catchments (77 and 20 μg/l, respectively). Apparently, PP did not originated from recent erosion of land surface but from sediment resuspension or bank erosion in streams. Significant relationships between P concentrations in oxalate extracts of upper (0–15 cm) and deep (50–70 cm) soil layers and between the phosphate saturation index in the 50–70 cm soil layer and the DRP concentration in runoff demonstrated existence of relationship between soil available P and P concentration in catchment runoff.
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National Repository of Grey Literature : 12 records found   previous11 - 12  jump to record:
See also: similar author names
7 RICHTR, Jan
1 Richtr, Jakub
7 Richtr, Jan
4 Richtr, Jiří
1 Richtr, Josef
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