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Water vapour sorption on mixtures of podzolic soils with organic fertiliser Rosahumus

100%

Skic K., Sokolowska Z.

Acta Agrophysica

2015

tom 22

nr 3

Water vapour sorption processes on mixtures of soil and organic fertiliser Rosahumus (RH) were investigated. Mixtures were prepared with Orthic Luvisol soil formed from loamy sand and Haplic Luvisol soil formed from loess. Samples contained different doses of fertiliser in the range from 1 to 50 weight percent. Differences in water vapour sorption on Rosahumus (RH) as well as the soils were observed. The properties of soil mixtures and organic material depended on the properties of both components and on the dose of Rosahumus. However, fertiliser was a dominant factor in sorption processes of investigated mixtures. Adsorption isotherms obtained by gravimetric method belonged to the same type II, in accordance to the BET classification. Significantly higher influence on the water vapour sorption was associated with fertiliser dose and was greater for mixtures with soil formed from loess. The increase of water vapour sorption was visibly higher for mixtures below 4% of Rosahumus content. On the other hand, greater concentration of RH resulted in similar amount of water vapour sorption and for Rosahumus dose of 50% the sorption was practically the same. Similar results were found for the maximum hygroscopicity (Mh) of mixtures. Strong correlation was observed between the Mh and the amount of added organic fertiliser with determination coefficient (R2) from 0.997 to 0.998.

The impact of building materials and the addition of peat on water retention in model urban soil

84%

Bowanko G., Hajnos M., Witkowska-Walczak B.

Polish Journal of Soil Science

2003

tom 36

nr 2

103-110

Presented here are the results of the investigations of the impact of building materials and peat on the static hydro-physical characteristics of Orthic Luvisol. The basic physical and chemical properties of the mixtures investigated have been determined. It has been assumed that a mixture of soil with foam-concrete shows a much higher level of water retention than do other mixtures in the whole range of pF values. The highest differences have been noticed for amounts of gravitational water and water useful for plants. The addition of peat into the soil and model mixtures increased retention levels in the whole range of pF values of the mixtures investigated. The presence of peat contributed mainly to an increase in water useful for plants and in water unavailable for plants.

Ograniczanie wyników

1 Acta Agrophysica

1 Polish Journal of Soil Science

1 Bowanko G.

1 Hajnos M.

1 Skic K.

1 Sokolowska Z.

1 Witkowska-Walczak B.

1 2015

1 2003

Wyniki wyszukiwania

Water vapour sorption on mixtures of podzolic soils with organic fertiliser Rosahumus

The impact of building materials and the addition of peat on water retention in model urban soil