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    Wyświetlanie 1-4 z 4
    Tytuł:
    Applicability of the indicator method for the determination of dynamics of the soil profile density against the background of gravimetric procedures
    Autorzy:
    Wlodek, S
    Biskupski, A.
    Pabin, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401858.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil density
    determination
    soil profile
    physical property
    soil science
    soil
    gravimetric procedure
    dynamics
    Opis:
    Commonly used gravimetric; method of determining soil density was compared under laboratory conditions with the indicator method developed at the Department of Soil Cultivation and Fertilization Techniques, IUNG Jelcz-Laskowice. The tests were carried out on artificial soil profiles with four degrees of compaction. Differences in the soil density determined with respective methods were in most eases contained within the limits of the measurement error. Discrepancies of the results obtained with the methods compared were decreasing along an increasing degree of soil density and thickness of the layer measured. The results obtained encourage to acknowledge the indicator method tested as an applicable measuring device lbr the density dynamics of soil profile.
    Źródło:
    Acta Agrophysica; 2000, 35; 219-233
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Popularisation of soil science: its necessity and possibilities
    Autorzy:
    Brozek, S
    Powiązania:
    https://bibliotekanauki.pl/articles/1450560.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil function
    soil structure
    soil profile
    soil monolith
    soil science
    environment
    soil education
    soil
    ability
    terrestrial ecosystem
    Opis:
    The author points to the necessity of propagating knowledge on the soil and suggests ways to do it. Firstly, he emphasises shortage of didactic aids for comprehensive teaching of soil science. He discusses this problem in comparison to other natural sciences far better known. As there are no useful teaching aids, the author draws our attention to the importance of the soil monolith, soil displays, posters and atlases. Moreover, he emphasises the role of Internet in education. Finally, he proposes to found a soil profile museum for educational purposes.
    Źródło:
    Acta Agrophysica; 2001, 50; 263-269
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of soil texture classification according to the new Polish Standard, PTG and international classifications [FAO and USDA]
    Autorzy:
    Drzymala, S
    Powiązania:
    https://bibliotekanauki.pl/articles/1401861.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    Polish Soil Science Society
    classification
    Polish Normalization Committee
    soil fraction
    international classification
    Polish standard PN-R-04033
    soil texture
    textural group
    Opis:
    The classification into soil fractions found in the new Polish Standard PN-R-04033 is fully comparable- with the international classifications (FAO/USDA) in question. The following diameters were adopted as the main groups of soil fractions: stones >75 mm, gravel 75-2 mm, sand 2.0-0.05 mm, silt 0.05-0.002 mm and clay <0.002 mm. On the other hand, soil fractions classification according to the Polish Soil Science Society (PTG), including so-called fine particles (<0.02 mm), is not compatible with both the new Polish Standard and the discussed international classifications. This also refers lo the classification into textural groups according to PTG. However, the classification into textural groups according lo Polish Standard is quite similar to international classifications.
    Źródło:
    Acta Agrophysica; 2000, 35; 49-53
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Principles and requirements for the soil texture analysis according to methods recommended by International Standard Organization [ISO]
    Autorzy:
    Drzymala, S
    Powiązania:
    https://bibliotekanauki.pl/articles/1401927.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    International Standard Organization
    soil science
    Polish standard
    Polish Normalization Committee
    soil material
    particle size distribution
    International Standard-ISO 11277
    international standard
    soil texture
    Opis:
    For several years now the Polish Normalisation Committee (PKN) has been angaged in the process of introduction (and implementation) of international standards complying with the Internationsl Standard Organsation (ISO) into the set of of Polish Standards.At present, in the PKN Commission of Soil Physics, a number of such standards are being prepared (translated) -including a very comprehensive standard dealing with partiele size distribution determination in soil material-ISO 11277 [6], Some principles and requirements included in this standard differ significantly from those commonly accepted and widely in use now in numerous pedologie laboratories in Poland [7,8]. Below there are some of the most important differences: (1 ) the requirement to remove organic matter from test samples (using 30% v/v solution of H2O2), (2) the requirement to remove water soluble salts and gypsum (to electrical conductivity 0,4 dS/m), (3) sample dispersion process must be longer than 18 hours. Many other requirements, of relatively lesser importance, in many cases also do not correlate with those commonly accepted in our laboratories.
    Źródło:
    Acta Agrophysica; 2000, 35
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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