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Ecological aspects of dispersion of gall mites in the vertical profile of the birch crown
Acalitus rudis Phyllocoptes lionotus tree crown dispersion ecology
2015/2/2
In stands of birch Betula pendula Roth in the eastern Krušné hory Mts. the occurrence of the gall mites Acalitus rudis Canestrini and Phyllocoptes lionotus Nalepa was studied in terms of their di...
Characterisation of soil aggregate stability by ultrasonic dispersion
ultrasonic dispersion soil aggregate stability soil particle dispersion
2008/11/24
Ultrasonic soil aggregate stability (USAS) of 5 European soils was investigated in ultrasonic dispersion tests, studying mass fractions of macroaggregates at different absorbed specific energy levels....
Some factors affecting clay dispersion and aggregate stability in selected soils of Nigeria
aggregate stability aggregated clay chemical extractants tropics water-dispersible clay
2008/11/24
Using 22 soil samples from Nigeria, comprising Alfisols, Entisols, Inceptisols, Ultisols and Vertisols with 77- 676 g kg-1 clay, we studied the effect of various treatments on clay dispersion. Aggrega...
Influence of vibration amplitude on the ultrasonic dispersion of soils
ultrasonic dispersion soil aggregates ultraso- nic energy vibration amplitude particle size distribution
2008/11/18
Ultrasonic dispersion is a powerful method of dispersing soil aggregates. Several procedures are described in the literature, which use absorbed ultrasonic energy as the main parameter for correlation...
Soil strength of some Central Eastern Nigeria soils and effect of potassiumand sodium on their dispersion
Atterberg limits coefficient of linear extensibility clay dispersion Nigeria
2008/11/11
Five soils with variable clay contents were studied with the objective of describing their physical properties and the influence of NaCl and KCl on their dispersion. The soils were analyzed for parti...