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Wyszukujesz frazę "Pachepsky, Y." wg kryterium: Autor

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    Wyświetlanie 1-13 z 13
    Tytuł:
    Infiltration into layered soil covered with a depositional seal: a Green-Ampt approach
    Autorzy:
    Pachepsky, Y.A.
    Timlin, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/25130.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    hydraulic conductivity
    soil profile
    Green-Ampt method
    soil
    infiltration
    water transport
    Źródło:
    International Agrophysics; 1996, 10, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimating parameters of empirical infiltration models from the global dataset using machine learning
    Autorzy:
    Kim, S.
    Karahan, G.
    Sharma, M.
    Pachepsky, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2083049.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    infiltration modelling
    random forest
    Soil Water
    Infiltration Global database
    Opis:
    It is beneficial to develop pedotransfer relationships to estimate infiltration equation coefficients in site-specific conditions from readily available data. No systematic studies have been published concerning the relationships between the accuracy of the infiltration equation and the accuracy of the predicted coefficients in this equation. The objective of this work was to test the hypothesis that, for the same infiltration data, the accuracy of pedotransfer predictions for coefficients in an infiltration equation is greater for the infiltration equation that performs better. The hypothesis was tested using the commonly employed Horton and Mezencev (modified Kostiakov) infiltration equations with data from the Soil Water Infiltration Global database. The random forest machine learning algorithm was used to develop the pedotransfer model. The Horton and the Mezencev models performed better with 928 and 758 datasets, respectively. The accuracy of the estimates of the infiltration equation coefficients did not differ substantially between the estimates obtained from all data and from the data where the infiltration equation had lower root-mean-squared error values. The root-mean-squared error values of the pedotransfer estimates decreased by 2 to 25% when only datasets with the same infiltration measurement method were considered. The development of predictive pedotransfer equations with the data obtained from the same infiltration measurement method is recommended.
    Źródło:
    International Agrophysics; 2021, 35, 1; 73-81
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Concurrent transport of reactive and non-reactive ions in undisturbed soil columns
    Autorzy:
    Korsunskaia, L.P.
    Shein, E.V.
    Pachepsky, Y.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24231.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    transport
    reactive ion
    soil heterogeneity
    non-reactive ion
    soil
    Źródło:
    International Agrophysics; 2004, 18, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transport of manure-borne Cryptosporidium parvum oocysts throught saturated and unsaturated soil columns
    Autorzy:
    Kuczynska, E.
    Pachepsky, Y.
    Rouhi, S.A.
    Shelton, D.R.
    Powiązania:
    https://bibliotekanauki.pl/articles/25144.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2005, 19, 4; 315-322
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of three techniques to assess surface heterogeneity of solids in soils
    Autorzy:
    Polubesova, T.A.
    Pachepsky, Y.A.
    Hajnos, M.
    Jozefaciuk, G.
    Sokolowska, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/25170.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil degradation
    surface adsorption
    surface heterogeneity
    energy distribution
    heterogeneity
    Źródło:
    International Agrophysics; 1997, 11, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impact of marble powder amendment on hydraulic properties of a sandy soil
    Autorzy:
    Farhadi-Machekposhti, M.
    Valdes-Abellan, J.
    Pla, C.
    Benavente, D.
    Pachepsky, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082885.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    saturated hydraulic conductivity
    soil water
    retention curve
    field capacity
    plant available water
    pore size
    distribution
    Opis:
    Marble powder is one of carbonate rock amendments that is used to improve soil reaction. We hypothesized that the powdered marble addition can cause favorable changes in hydraulic properties of sandy soils. Six levels of marble powder addition to an aridisol soil (0%; M0; 5%; M5; 10%; M10; 15%; M15; 20%; M20 and 25%, M25; by bulk volume) were analyzed in triplicate. The saturated hydraulic conductivity and soil water retention curves were obtained. Pore space properties were investigated using soil water retention curves, mercury intrusion porosimetry and scanning electron microscopy. The saturated hydraulic conductivity significantly decreased (between 83 and 97% for M5 and M25 respectively) and parameters α and n of the van Genuchten model significantly decreased in marble-amended soils. Both field capacity and permanent wilting point increased with the addition of marble powder. Plant-available water, increased significantly until 10% of marble powder application; higher percentages of application did not provide additional significant changes in the plant-available water. Pore space distributions from soil water retention curves parameters showed an increase in the pore size range and a decrease in the average pore size; pore space distribution from the scanning electron microscopy also showed the presence of a new family of dominant pore sizes which was not detected by the soil water retention curves parameters approach. It was concluded that the addition of marble powder can improve the ability of soil to store water providing an advantage for irrigation water management in water scarce environments. Further research will have to address the impact of marble powder amendment under field semi-arid conditions.
    Źródło:
    International Agrophysics; 2020, 34, 2; 223-232
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microbial transport in soil caused by surface and subsurface drip irrigation with treated wastewater
    Autorzy:
    Kouznetsov, M.Y.
    Pachepsky, Y.A.
    Gillerman, L.
    Gantzer, C.J.
    Oron, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/24290.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    bacteriophage
    subsurface drip irrigation
    fecal coliform
    waste water
    surface drip irrigation
    microbial transport
    soil
    irrigation
    Źródło:
    International Agrophysics; 2004, 18, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Limited entrapment model to simulate the breakthrough of Arthrobacter and Aquaspirillum in soil columns
    Autorzy:
    Pachepsky, Y.A.
    Devin, B.A.
    Polyanskaya, L.M.
    Shelton, D.R.
    Shein, E.V.
    Guber, A.K.
    Powiązania:
    https://bibliotekanauki.pl/articles/25368.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    transport experiment
    soil column
    simulation
    Arthrobacter
    ground water
    limited entrapment model
    bacterial transport
    Aquaspirillum
    Źródło:
    International Agrophysics; 2006, 20, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strain-dependent variations in attachment of E. coli to soil particles of different sizes
    Autorzy:
    Pachepsky, Y.A.
    Yu, O.
    Karns, J.S.
    Shelton, D.R.
    Guber, A.K.
    van Kessel, J.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/26571.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2008, 22, 1; 61-66
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of shallow subsurface flow pathway networks on corn yield spatial variation under different weather and nutrient management
    Autorzy:
    Morgan, B.J.
    Daughtry, C.S.T.
    Russ, A.L.
    Dulaney, W.P.
    Gish, T.J.
    Pachepsky, Y.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082501.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    subsurface flow pathways
    ground penetrating radar
    geographic weighted regression
    corn yield
    Opis:
    Ground water availability can be a major spatially variable factor of crop yields. In soils with the infiltration-restricting layer, ground water can be organized in the network of channels that conduct water laterally in wet periods and become water storage and water subsidy sources for plants in dry periods. The objective of this work was to quantify the relationships between the distances to the subsurface flow pathway network and corn yield for different weather conditions and nutrient management. Corn yield was monitored across the manured and chemically fertilized fields at the USDA-ARS OPE3 experimental site in Maryland. Data were collected during dry, normal, and above normal years in terms of the amount of precipitation from planting to physiological maturity. The subsurface flow pathway network was delineated using ArcGIS from data on topography of the infiltration-restricting layer found mostly at depths between one and three meters. The geographically weighted regression was used. Adjusted determination coefficients of regressions ranged from 0.485 to 0.655. Decrease of the adjusted determination coefficients from a dry to normal year and an increase from the normal to wet year was found. Factoring the subsurface flow pathway network influence into crop management can be an important component of precision farming strategies.
    Źródło:
    International Agrophysics; 2019, 33, 2; 271-276
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temporal stability of estimated soil water flux patterns across agricultural fields
    Autorzy:
    Guber, A.K.
    Gish, T.J.
    Pachepsky, Y.A.
    van Genuchten, M.T.
    Daughtry, C.S.T.
    Nicholson, T.J.
    Cady, R.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/26191.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Źródło:
    International Agrophysics; 2008, 22, 3; 209-214
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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