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Wyświetlanie 1-15 z 16
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:
Clay-organic complexes in a Polish loess soil
Autorzy:
A. Czyż, Ewa
Rejman, Jerzy
R. Dexter, Anthony
Jadczyszyn, Jan
Rafalska-Przysucha, Anna
Stanek-Tarkowska, Jadwiga
Powiązania:
https://bibliotekanauki.pl/articles/973053.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
carbon sequestration
clay dispersion
complexed organic matter
non-complexed clay
strip tillage
Opis:
Complexes formed between clay and soil organic matter are important for carbon sequestration and for soil physical quality. Here, we use samples of loessial soil from South-East Poland to explore the phenomenon of complexing in loess. Soil samples were collected from a single catchment 8 years after the introduction of strip tillage and their compositions were characterized by traditional methods. Complexing was characterized in terms of the content of non-complexed clay which was estimated in two ways: firstly, by measurement of the content of readily-dispersible clay (which was assumed to be the non-complexed clay); and secondly, by calculation using algorithms that had been developed and evaluated previously. The calculations were based on the concept that, at carbon saturation, the clay/organic carbon mass ratio is equal to n. The calculations were done with a range of values of n. It was assumed that the correct value of n was that which gave the greatest coefficient of correlation between the measured values of clay dispersion and the predicted values of non-complexed clay. For the loess used, the optimum value was n = 14.
Źródło:
International Agrophysics; 2017, 31, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of different soil management practices on soil properties and microbial diversity
Autorzy:
M. Gajda, Anna
A. Czyż, Ewa
R. Dexter, Anthony
M. Furtak, Karolina
Grządziel, Jarosław
Stanek-Tarkowska, Jadwiga
Powiązania:
https://bibliotekanauki.pl/articles/972380.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
The effects of different tillage systems on the properties and microbial diversity of an agricultural soil was investigated. In doing so, soil physical, chemical and biological properties were analysed in 2013-2015, on a long-term field experiment on a loamy sand at the IUNG-PIB Experimental Station in Grabów, Poland. Winter wheat was grown under two tillage treatments: conventional tillage using a mouldboard plough and traditional soil tillage equipment, and reduced tillage based on soil crushing-loosening equipment and a rigid-tine cultivator. Chopped wheat straw was used as a mulch on both treatments. Reduced tillage resulted in increased water content throughout the whole soil profile, in comparison with conventional tillage. Under reduced tillage, the content of readily dispersible clay was also reduced, and, therefore, soil stability was increased in the toplayers, compared with conventional tillage. In addition, the beneficial effects of reduced tillage were reflected in higher soil microbial activity as measured with dehydrogenases and hydrolysis of fluorescein diacetate, compared with conventional tillage. Moreover, the polimerase chain reaction – denaturing gradient gel electrophoresis analysis showed that soil under reduced tillage had greater diversity of microbial communities, compared with conventionally-tilled soil. Finally, reduced tillage increased organic matter content, stability in water and microbial diversity in the top layer of the soil.
Źródło:
International Agrophysics; 2018, 32, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of long-term use of different farming systems on some physical, chemical and microbiological parameters of soil quality
Autorzy:
Gajda, A.M.
Czyz, E.A.
Dexter, A.R.
Powiązania:
https://bibliotekanauki.pl/articles/24836.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
long-term use
farming system
physical parameter
chemical parameter
microbiological parameter
soil quality
organic matter
bulk density
Źródło:
International Agrophysics; 2016, 30, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of reduced and traditional tillage on soil properties and diversity of diatoms under winter wheat
Autorzy:
Stanek-Tarkowska, J.
Czyz, E.A.
Dexter, A.R.
Slawinski, C.
Powiązania:
https://bibliotekanauki.pl/articles/26476.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2018, 32, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of soil management on the dispersibility of clay in a sandy soil
Autorzy:
Dexter, A.R.
Czyz, E.A.
Powiązania:
https://bibliotekanauki.pl/articles/24988.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
organic matter
clay
turbidity
fertilization
soil
stability
sandy soil
organic carbon content
dispersion
climate
Źródło:
International Agrophysics; 2000, 14, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of the density of the clay-organic complex in soil
Autorzy:
Czyz, E.A.
Dexter, A.R.
Powiązania:
https://bibliotekanauki.pl/articles/24815.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
estimation
density
clay soil
organic matter
soil
clay content
organic matter content
Źródło:
International Agrophysics; 2016, 30, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of soil type on the wilting of plants
Autorzy:
Czyz, E.A.
Dexter, A.R.
Powiązania:
https://bibliotekanauki.pl/articles/24622.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
It has been shown that the water remaining in soil when plants wilt due to soil limitations and the residual water content as observed when soils are de-watered in pressure cell apparatus are essentially the same. Both are produced by immiscible displacement of water by air, and this leads to the water remaining in soil not being in thermodynamic equilibrium. Water removal by immiscible displacement ceases when hydraulic cut-off is reached. The point of hydraulic cut-off may be calculated by fitting waterretention data to equations for both the non-equilibrium case and the equilibrium case, and then solving these simultaneously. This has been done forwater retention data for 52 soil horizons in Poland. These results are used to obtain a pedotransfer function for the permanent wilting point due to soil limitations and the results are presented for the different soil texture classes. The pore water suction when wilting occurs is estimated to be 1.0 MPa. The methods and findings in this paper are used to explain a range of published results on plant wilting.
Źródło:
International Agrophysics; 2013, 27, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical dispersion of clay from soil into water: readily-dispersed and spontaneously-dispersed clay
Autorzy:
Czyz, E.A.
Dexter, A.R.
Powiązania:
https://bibliotekanauki.pl/articles/24323.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
mechanical dispersion
clay
soil
water
readily-dispersed clay spontaneously-dispersed clay
Opis:
A method for the experimental determination of the amount of clay dispersed from soil into water is described. The method was evaluated using soil samples from agricultural fields in 18 locations in Poland. Soil particle size distributions, contents of organic matter and exchangeable cations were measured by standard methods. Sub-samples were placed in distilled water and were subjected to four different energy inputs obtained by different numbers of inversions (end-over-end movements). The amounts of clay that dispersed into suspension were measured by light scattering (turbidimetry). An empirical equation was developed that provided an approximate fit to the experimental data for turbidity as a function of number of inversions. It is suggested that extrapolation of the fitted equation to zero inversions enables the amount of spontaneously-dispersed clay to be estimated. This method introduces the possibility of replacing the existing subjective, qualitative method of determining spontaneously-dispersed clay with a quantitative, objective method. Even though the disper-sed clay is measured under saturated conditions, soil samples retaina ‘memory’ of the water contents at which they have been stored.
Źródło:
International Agrophysics; 2015, 29, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podłoże bezsurowicze do hodowli mysich komórek krwiotwórczych
Bezsyvorotkovyjj substrat dlja primenenija v kulture gemopoehticheskikh kletok myshi
Non-serum medium for culture of murine haemopoietic cells
Autorzy:
Pojda, Z.
Migdalska, A.
Machaj, E.K.
Dexter, T.M.
Powiązania:
https://bibliotekanauki.pl/articles/2186390.pdf
Data publikacji:
1989
Wydawca:
Polskie Towarzystwo Diagnostyki Laboratoryjnej
Tematy:
hodowla laboratoryjna
hodowla komorek
komorki krwiotworcze
podloza hodowlane
podloze bezsurowicze
Źródło:
Diagnostyka Laboratoryjna; 1989, 25, 3; 166-172
0867-4043
Pojawia się w:
Diagnostyka Laboratoryjna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response of spring barley to changes of compaction and aeration of sandy soil under model conditions
Autorzy:
Czyz, E.A.
Tomaszewska, J.
Dexter, A.R.
Powiązania:
https://bibliotekanauki.pl/articles/26019.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
aeration
oxygen diffusion rate
soil
sandy soil
compaction
yield
root growth
barley
soil compaction
soil bulk density
spring barley
model condition
Źródło:
International Agrophysics; 2001, 15, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soil crumbling during tillage as a function of soil organic matter content
Autorzy:
Dexter, A.
Czyz, E.
Powiązania:
https://bibliotekanauki.pl/articles/25817.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
crumbling
direct drilling
mouldboard ploughing
non-complexed material
organic matter
organic matter content
pasture
physical quality
soil crumbling
soil function
soil quality
tillage
Źródło:
International Agrophysics; 2011, 25, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soil mechanical properties of a partly-reloosened [split plough system] and a conventionally-tilled overconsolidated gleyic luvisol derived from glacial till
Autorzy:
Horn, R.
Kretschmer, H.
Baumgartl, T.
Bohne, K.
Neupert, A.
Dexter, A.R.
Powiązania:
https://bibliotekanauki.pl/articles/25477.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
water pressure
soil depth
Germany
soil condition
mechanical loosening
arable soil
physical property
soil
fertile soil
loosening
mechanical property
ploughing system
water content
Źródło:
International Agrophysics; 1998, 12, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 16

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