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Wyszukujesz frazę "Sand" wg kryterium: Temat

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    Wyświetlanie 1-13 z 13
    Tytuł:
    A comparison of oxygen diffusion rates in sand moistened with water or PEG 20000 solution
    Autorzy:
    Hiller, S.
    Dexter, A.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/24419.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    sand
    air
    oxygen diffusion
    polyethylene glycol
    water
    Źródło:
    International Agrophysics; 1997, 11, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of wind direction on aeolian sand transport in Southern Tunisia
    Autorzy:
    Khatelli, H.
    Gabriels, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/24714.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    Tunisia
    wind direction
    sand transport
    aeolian transport
    Źródło:
    International Agrophysics; 2000, 14, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the sand particle shape on particle size distribution measured by laser diffraction method
    Autorzy:
    Polakowski, C.
    Sochan, A.
    Bieganowski, A.
    Ryzak, M.
    Foldenyi, R.
    Toth, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/25877.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    sand
    particle shape
    particle size distribution
    laser diffraction
    Opis:
    The aim of this paper was to show how the shape of sand particles affects the results of particle size distribution obtained by the laser diffraction method. On the basis of the results obtained one can conclude: the shape of the investigated particles influences particle size distribution obtained by the laser diffraction method. This phenomenon occurs in the sand fraction, as shown in our investigation. The importance of this effect depends on the type of the measured material and on the aim of the investigations. For most researchers in soil science and sedimentology who investigate sand fractions, this impact can be negligible. Further investigations with other soil and sediment fractions are needed.
    Źródło:
    International Agrophysics; 2014, 28, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water retention characteristics of peat and sand mixtures
    Autorzy:
    Walczak, R.
    Rovdan, E.
    Witkowska-Walczak, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/24458.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    total porosity
    peat soil
    organic matter content
    bulk density
    sand
    soil
    hydrophysical property
    peat-sand mixture
    peat
    water retention
    Źródło:
    International Agrophysics; 2002, 16, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamics of organic matter in peat soil under the conditions of sand-mix culture during 15 years
    Autorzy:
    Bambalov, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/24852.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    organic matter
    peat soil
    soil
    sand-mix culture
    dynamics
    Źródło:
    International Agrophysics; 1999, 13, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the changes induced by gasification biochar in a peat-sand substrate
    Autorzy:
    Muter, O.
    Lebedeva, G.
    Telysheva, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/24239.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    gasification
    biochar
    plant growth
    carbon dioxide
    soil
    soil quality
    buffering capacity
    peat-sand substrate
    Opis:
    Gasification biochar represents one of the biochar types tested for agricultural needs. The aim of this study was to clarify the physico-chemical and biological changes occurring in a peat-sand substrate amended with hardwood-derived gasification biochar in the rates of 2, 4 and 20 g l-1. The pH(H2O) of the substrate with 4 g l-1 and 20 g l-1 biochar was increased from 5.6 to 6.2 and 6.7, respectively. The testing of the substrate in the re- spirometry device showed that the increase in the biochar rate led to a decrease in the amount of CO2 evolved at the maximum pressure drop. The continuous decrease in pressure observed in the respirometry bottles filled with pure biochar allows explaining this effect by biochar sorption activity. Addition of 2 and 4 g l-1 biochar to the peat-sand substrate stimulated the growth of cucumbers in an 18-day pot vegetation experiment. An increase in the number of root tips and root volume with a decreasing average root diameter was shown in the presence of biochar. Stimulation of plant growth on the background of low rates of biochar requires a further study with emphasis on the specific combination of biochar, soil type, plant species, and climatic conditions.
    Źródło:
    International Agrophysics; 2014, 28, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical properties of the soil formed as a result of recultivation of sand-pits in the Bobr River valley
    Autorzy:
    Greinert, H
    Drab, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401929.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    gravel exploitation
    sand exploitation
    soil formation
    Bobr River
    recultivation
    physical property
    soil
    sandpit
    alluvial soil
    Opis:
    Quite large areas of the alluvial soils in the valley of the river Bobr were destructed by the sand and gravel exploitation. After the recultivation measures, which consisted of backfilling of the open-castwith waste aggregate, levelling the surface and putting on such prepared surface 50-200 cm of the stripping material,the yield was very low.The field and laboratory experiments have shown that during the technical operations the soil was compacted to such degree, that the root growth and water permeability was restricted to large extent.The soil compaction was noted in the whole soil profile.The evidences of this process were the high bulk density( often over 1,8 Mg m-3), very low water permeability values and low air capacity. The situation during the 12 years from the finishing of the recultivation has not changed.
    Źródło:
    Acta Agrophysica; 2000, 35
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soil water balance of an arid linear sand dune
    Autorzy:
    Rummel, B.
    Felix-Henningsen, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/25882.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    arid linear sand dune
    arid ecosystem
    soil
    moisture measurement
    water soil
    time domain reflectometry
    water balance
    Źródło:
    International Agrophysics; 2004, 18, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Denitrification, organic matter and redox potential transformations in Cambisols
    Autorzy:
    Wlodarczyk, T.
    Stepniewska, Z.
    Brzezinska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/24127.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    clay
    silt
    organic matter
    greenhouse gas
    Polska
    sand
    denitrification
    loess
    soil respiration
    flood condition
    redox potential
    Źródło:
    International Agrophysics; 2003, 17, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seasonal changes in labile organic matter, mineral nitrogen, and N2O emission in a loamy sand Orthic Luvisol cultivated under three management practices
    Autorzy:
    Dabek-Szreniawska, M.
    Balashov, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/25164.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    organic matter
    soil quality
    emission
    loamy sand
    labile organic matter
    management practice
    nitrogen dioxide
    seasonal change
    growing period
    Źródło:
    International Agrophysics; 2007, 21, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamics of competitive sorption of heavy metal cations in mineral soils
    Autorzy:
    Gaszczyk, R
    Muszynski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401867.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    mineral soil
    Orthic Luvisol
    weakly loamy sand
    competitive sorption
    soil
    metal cation
    loess
    grey-brown podzolic soil
    dynamics
    heavy metal
    Opis:
    Model research on competitive sorption of heavy metal cations (Cu2+ , Zn2+ , Ni2+ ,Co2+ , Cd2+ and Cr3+ ) with Ph2+cations was carried out in the followingmineral soils: grey-brown podzolic derived from loess (Orthic Luvisols)using a dynamic method.Investigation on the course and the range of the sorption from the two- component solutions allowed to determine mobility of individual heavy metal cations in relation to lead (II) cations.At the same time, it allowed to evaluate their phyto-availability. Elements, which most easily entered sorptive complexes of both of the investigated soils were copper (II) and chrominium (III) cations. The rest of the cations showed different energy levels of entrance with simultaneous sorption with lead (II) cations. During competitive sorption of heavy metal cations, i.e. at saturation the columns with two component solution, the presence of the second, opposite process namely desorption of the following cations from the soil:Co2+ , Zn2+ , Ni2+ , and Cd2+ was observed. Desorption levels were characteristic for particular cations and depended on the type of soil.
    Źródło:
    Acta Agrophysica; 2000, 35; 69-76
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Field validation of DNDC and SWAP models for temperature and water content of loamy and sandy loam Spodosols
    Autorzy:
    Balashov, E.
    Buchkina, N.
    Rizhiya, E.
    Farkas, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/972349.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    field validation
    agroecosystem
    modelling
    soil water content
    soil temperature
    DNDC model
    SWAP model
    temperature
    water content
    loamy sand
    sandy loam
    Spodosol
    Opis:
    The objectives of the research were to: fulfil the preliminary assessment of the sensitivity of the soil, water, atmosphere, and plant and denitrification and decomposition models to variations of climate variables based on the existing soil database; validate the soil, water, atmosphere, and plant and denitrification and decomposition modelled outcomes against measured records for soil temperature and water content. The statistical analyses were conducted by the sensitivity analysis, Nash-Sutcliffe efficiency coefficients and root mean square error using measured and modelled variables during three growing seasons. Results of sensitivity analysis demonstrated that: soil temperatures predicted by the soil, water, atmosphere, and plant model showed a more reliable sensitivity to the variations of input air temperatures; soil water content predicted by the denitrification and decomposition model had a better reliability in the sensitivity to daily precipitation changes. The root mean square errors and Nash-Sutcliffe efficiency coefficients demonstrated that: the soil, water, atmosphere, and plant model had a better efficiency in predicting seasonal dynamics of soil temperatures than the denitrification and decomposition model; and among two studied models, the denitrification and decomposition model showed a better capability in predicting the seasonal dynamics of soil water content.
    Źródło:
    International Agrophysics; 2014, 28, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantity and quality of organic matter in forest and arable soils developed from sand and loess
    Autorzy:
    Smal, H
    Misztal, M.
    Ligeza, S.
    Dyminska-Wydra, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1450660.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    organic matter
    ecological condition
    soil type
    humic substance
    loess
    organic carbon fraction
    arable soil
    forest biocenosis
    soil constituent
    quantity
    sand
    soil
    sandy soil
    soil cultivation
    quality
    terrestrial ecosystem
    Opis:
    Eight sandy and three loess forest and arable soils taken from the S-E region of Poland were used in the study. The following fractions of C were determined: total organic carbon, fraction soluble in 0.5 mol NaOH dm-3 (humic acids + fulvic acids), humic acids, fulvic acids, fraction soluble in 0.5 mol H2SO4 dm-3 (hemicelluloses) and residue. Quantity and quality of organic matter depended on horizon and soil use. The highest content was shown by fraction of humus acids and residue, whereas the lowest - hemicelluloses fraction. In most soils C ratio of humic to fulvic acids exceeded 1.0. On average, in humus horizons, it was higher in arable than in forest soils and in loess as against sandy soils. In sandy soils, a slightly higher content of humus fraction and lower residue one than in loess soils was found.
    Źródło:
    Acta Agrophysica; 2001, 50; 225-234
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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