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In a laboratory experiment, the changes of extracted phosphorus (DEP) in 33 limed and non-limed soils were determined 7 and 30 days after fertilisation with P, as well as DEP and DEPCa indices were evaluated as related to P sorption and to certain soil properties. The concentration of available phosphorus in the soils was measured in 0.03 M CH3COOH extract by the Nowosielski method. The changes of...
The activity of phytotoxic lithium was different on different soils. Lithium affected plant development, plant appearance and yield; in the first year of the experiment its toxic effect was more pronounced than in the second.
The studies were conducted on peat materials at various states of secondary transformation characterised by the W1 index. The positive correlation between the specific surface area calculated from water vapour adsorption and the water holding capacity index W1 was found. However, no direct relationship between the specific surface area determined from nitrogen adsorption was noticed. The variable...
The waste activated sludge from Siedlce contained the largest amount of sulphur (7.4 g kg-1 of DM) and the lowest FYM (0.9 g kg-1 of DM). The largest amount of nitrogen was determined as coming from the waste sludge from the poultry processing factory Drosed (89.2 g kg-1 of DM) and the lowest in the FYM (18.7 g kg-1 of DM). During one year of the incubation of the organic materials investigated, the...
The field experiment was carried out between 1994-1998 at the Agricultural Experimental Station of the Academy of Podlasie, Siedlce on the influence of the means of inoculation with Rhizobium galegae and Nostoc of the Galega orientalis (Lam.) seed variety Gale on the content of dry matter, nitrogen, total protein, ash and crude fiber as well as on the yield of this plant. The climatic conditions during...
The paper shows the influence of geographical conditions on soil chemical properties along the southern coast of Bellsund in Spitsbergen. Soils of the western part of the Bellsund Coast, situated closer to the ocean, have been affected by more favourable climatic conditions (mainly humidity) compared with the soils of the eastern part. This is reflected by a more intense plant cover in the western...
In laboratory investigations, 9 methods of sorption ability against phosphorus in 36 soils of southern Poland (loam 7-71% , Corg 0.41-2.0%, Alox 14.7-64.8 mmol kg -1 and Feox 15.7-174.5 mmol kg-1) were compared. Evaluation of the maximum P sorption (Pmax) as well as two ways of buffering capacity against P (PBC) was estimated from multipoint curves according to the data of the Langmuir and Freundlich...
The results of studies on the hysteresis effect of water retention curves of mineral and organic soils showed that Gleyic Phaeozem aggregates are characterized with a greater ability to retain water than are Haplic Luvisol aggregates. The highest values of moisture differences were noticed for 0.5-1 mm Gleyic Phaeozem aggregates at low soil water potential. The effect of hysteresis was small for aggregates...
The rate of broadleaf forest litter decomposition as well as leaching of nitrogen and phosphorus was estimated, on two plots situated in an about 150-year old oak-hornbeam tree stand. In both ecosystems the rate of production and decomposition of litter was approximately the same. There was evidence of the dependence of the decomposition rate on the total precipitation in the vegetative season. The...
Two sandy and two silty soils located in an industrial region were used to determine the composition of a soil solution and the total content in the soil of Mn, Zn, Cu, Pb, and Cd. The percentage (%) of metals in the soil solution and the total soil content was calculated. Generally, the soil solution composition did not differ substantially from the data reported for comparable uncontaminated soils...
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