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Wyszukujesz frazę "soil conductivity" wg kryterium: Temat

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    Wyświetlanie 1-11 z 11
    Tytuł:
    Determining bulk electrical conductivity of soil from attenuation of electromagnetic pulse
    Autorzy:
    Malicki, M.A.
    Kokot, J.
    Skierucha, W.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/26177.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    electromagnetic pulse
    electrical conductivity
    soil
    soil salinity
    Źródło:
    International Agrophysics; 1998, 12, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluating the suitability of a new telemetric capacitance-based measurement system for real-time application in irrigation and fertilization management
    Autorzy:
    Treder, Waldemar
    Klamkowski, Krzysztof
    Tryngiel-Gać, Anna
    Wójcik, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2203534.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    electrical conductivity
    fertigation
    salinity
    soil moisture
    Opis:
    The suitability of a new wireless smart farming system for controlling irrigation and fertilization of horticultural plants was assessed in the study. The system (name: AGREUS® ) includes sensors (soil moisture, salinity, weather data), executive modules (valve modules), and an application available on the web portal (accessed through computers and mobile devices). The studies were performed under laboratory and field conditions. Laboratory tests included appraisal of the precision of soil moisture and salinity measurements carried out with the soil probe (comparison with the results obtained by laboratory methods). Operational tests were conducted in field trials. In these trials, assessment of the possibility of practical control of irrigation and monitoring soil salinity was performed in an apple orchard. The conducted analyses have shown the usefulness of the system, not only for automatic control of irrigation but also for making decisions about the necessity to fertilize plants. The system enables continuous monitoring of changes in soil moisture and salinity, including the migration of minerals across the soil profile (using a probe with several measuring elements) as a result of the applied irrigation or rainfall. The system allows for automatic application of irrigation or fertigation depending on the adopted soil moisture and salinity thresholds. However, the tests showed that a salinity index calculated by the system does not directly correspond to the salinity values determined by laboratory methods. For this reason individual interpretation and determination of optimal ranges for plants is required.
    Źródło:
    Journal of Water and Land Development; 2023, 56; 67--73
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soil moisture and bulk electrical conductivity variability measured by TDR
    Autorzy:
    Sobczuk, H.A.
    Zhixiong, C.
    Liuzong, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/24636.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    variability
    soil heterogeneity
    electrical conductivity
    soil water
    measurement
    soil moisture
    water content
    Źródło:
    International Agrophysics; 1996, 10, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temporal stability of electrical conductivity in a sandy soil
    Autorzy:
    Pedrera-Parrilla, A.
    Brevik, E.C.
    Giraldez, J.V.
    Vanderlinden, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/26163.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    temporal stability
    electrical conductivity
    sandy soil
    soil texture
    soil water content
    spatial variability
    Źródło:
    International Agrophysics; 2016, 30, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effectiveness of biochar in mitigating changes in the chemical properties of sandy soil treated with various chemicals
    Autorzy:
    Gondek, K.
    Mierzwa-Hersztek, M.
    Kopec, M.
    Losak, T.
    Bennewitz, E.
    Spandel, A.
    Kuc, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192382.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    biochar
    soil
    sorption complex
    pH
    electrical conductivity
    heavy metal
    Opis:
    The progressive degradation of soils is a recently increasing environmental problem. The risk of soil degradation may be associated, for example, with landslides, flooding, soil erosion. However, these are relatively rare phenomena compared to the risk of chemical degradation caused by human activity. Given the limited research on the positive effect of miscanthus biochar on soil properties, a study was carried out aimed at determining changes in pH, electrical conductivity, sorption properties, and mobility of selected heavy metals in sandy soil treated with various chemicals. Biochar used in the study was produced at a temperature of 300°C. The addition of biochar to soil generally increased the pH value, regardless of the type of chemical degradation. The study revealed a decrease in the hydrolytic acidity value and, at the same time, no significant changes in the content of alkaline cations and sorption capacity of the biochar-treated soil. The best effect on reducing the mobility of trace elements was achieved by adding biochar to the soil supplemented with acidifying substances. Bearing in mind the current agricultural and environmental problems, there is a need to increase the effectiveness of biochar and to direct its action to improve specific soil properties.
    Źródło:
    Journal of Elementology; 2020, 25, 3; 1045-1058
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Simultaneous measurement of oxygen flux and salinity of the water saturated mineral soils
    Autorzy:
    Bieganowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/24164.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    mineral soil
    simultaneous measurement
    electrical conductivity
    saturated soil
    oxygen flux
    soil oxygen
    soil salinity
    water
    salinity
    flux density
    Źródło:
    International Agrophysics; 2003, 17, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recent software improvements in moisture [TDR method], matric pressure, electrical conductivity and temperature meters of porous media
    Autorzy:
    Skierucha, W.
    Wilczek, A.
    Walczak, R.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/24442.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    moisture
    electrical conductivity
    user interface
    temperature
    porous medium
    soil water
    soil salinity
    time domain reflectometry
    soil temperature
    water content
    Źródło:
    International Agrophysics; 2006, 20, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Liczebnosc drobnoustrojow i przewodnictwo elektrolityczne gleby roznie uprawianej
    Number of microorganisms and electrolitical conductivity of soil under various cultivation systems
    Autorzy:
    Dabek-Szreniawska, M
    Ksiezopolska, A.
    Kus, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1632533.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    uprawa roli
    gleby
    mikrobiologia gleb
    mikroorganizmy glebowe
    liczebnosc mikroorganizmow
    przewodnictwo elektrolityczne
    soil tillage
    soil
    soil microbiology
    soil microorganism
    microorganism number
    electrical conductivity
    Opis:
    Autorzy niniejszej pracy przedstawili badania mające na celu określenie zmian zachodzących we właściwościach mikrobiologicznych i przewodnictwa elektrolitycznego w glebie w zależności od systemu jej użytkowania. Gleba spod uprawy jęczmienia z nawożeniem organicznym charakteryzowała się najwyższą liczebnością, badanych mikroorganizmów. Różne systemy uprawy miały wpływ także na wielkości przewodnictwa elektrolitycznego właściwego badanych prób glebowych.
    Autors of this paper presented the research which goal was to present changes undergoing in microbiological properties in electrolitic conductivity dependently on cultivation system. Organically fertilized soil received from under barley cultivation was characterized by higher number of microorganisms.Different systems of cultivation had also influence on specific electrolic conductivity of examined soil samples.
    Źródło:
    Acta Agrophysica; 1999, 23; 31-38
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessing the temporal stability of spatial patterns of soil apparent electrical conductivity using geophysical methods
    Autorzy:
    De Caires, S.A.
    Wuddivira, M.N.
    Bekele, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/26396.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    temporal stability
    spatial pattern
    soil
    plantation
    cocoa
    Theobroma cacao
    soil property
    electrical conductivity
    electromagnetic induction
    geophysical method
    Opis:
    Cocoa remains in the same field for decades, resulting in plantations dominated with aging trees growing on variable and depleted soils. We determined the spatio-temporal variability of key soil properties in a (5.81 ha) field from the International Cocoa Genebank, Trinidad using geophysical methods. Multi-year (2008-2009) measurements of apparent electrical conductivity at 0-0.75 m (shallow) and 0.75-1.5 m (deep) were conducted. Apparent electrical conductivity at deep and shallow gave the strongest linear correlation with clay-silt content (R = 0.67 and R = 0.78, respectively) and soil solution electrical conductivity (R = 0.76 and R = 0.60, respectively). Spearman rank correlation coefficients ranged between 0.89-0.97 and 0.81-0.95 for apparent electrical conductivity at deep and shallow, respectively, signifying a strong linear dependence between measurement days. Thus, in the humid tropics, cocoa fields with thick organic litter layer and relatively dense understory cover, experience minimal fluctuations in transient properties of soil water and temperature at the topsoil resulting in similarly stable apparent electrical conductivity at shallow and deep. Therefore, apparent electrical conductivity at shallow, which covers the depth where cocoa feeder roots concentrate, can be used as a fertility indicator and to develop soil zones for efficient application of inputs and management of cocoa fields.
    Źródło:
    International Agrophysics; 2014, 28, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electrokinetic remediation technology of heavy metal contaminated soil based on improving soil electrical conductivity
    Autorzy:
    Liu, Jiangang
    Zhang, Wei
    Liu, Mingwei
    Zhang, Hao
    Powiązania:
    https://bibliotekanauki.pl/articles/2032843.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    soil pollution
    heavy metals
    NaCl
    electrical conductivity
    soil remediation
    skażenie gleby
    metale ciężkie
    przewodność elektryczna
    remediacja gleb
    Opis:
    An electrokinetic remediation technique taking Cr(VI) as an example is proposed to improve the conductivity of contaminated soil, which significantly increases the current density in the soil. The improvement of soil conductivity was achieved by continuous spraying of NaCl solution with a concentration of 4 g·dm–3 on the soil surface. The distances of electrode pairs were 2.0 m and 1.5 m, respectively. The heavy metal-contaminated soil thickness was 25 cm, and the DC power supply voltage was 90 V. The experiment demonstrated that under the condition of continuous spraying of NaCl solution on the soil surface, the current density variation was related to the salt content in the soil, and the current density in the soil generally increased linearly with time. The effectiveness of soil remediation is related to the electric field strength and current density, and there exists an optimal electric field that can reduce the heavy metal content in the soil at any point by minimizing the electric field strength and current density. Most of the heavy metals can be concentrated within a diameter of about 15 cm around the anode under the optimal electric field, which can be remediated after removing the soil.
    Źródło:
    Environment Protection Engineering; 2021, 47, 4; 5-17
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nigerian lateritic clay soils as hydraulic barriers to adsorb metals. Geotechnical characterization and chemical compatibility
    Autorzy:
    Ojuri, O. O.
    Akinwumi, I. I.
    Oluwatuyi, O. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/208070.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    glina
    metale ciężkie
    gleba
    przewodnictwo elektryczne
    Nigeria
    clay
    heavy metals
    soil
    electrical conductivity
    Opis:
    The suitability of using lateritic clays from Aviele and Igarra has been investigated both in the Northern part of Edo state, Nigeria as liners of an engineered landfill and to adsorb metals in leachates. Geotechnical characteristics, pH, and elemental composition for the lateritic clay samples were determined. The chemical composition, pH, total dissolved solids and electrical conductivity were determined for leachates collected from two dumpsites. The capacities of the lateritic clay soils to adsorb heavy metals in the leachates were determined using the batch equilibrium adsorption technique. The unconfined compressive strength (UCS) of soils were found to be sufficient to resist damage. By both the standard and modified Proctor compaction tests, it was found that the coefficients of permeability for the soil samples were lower than 1×10–9 m/s that is widely recommended for soils that are to be used as landfill liners. Pb2+, Zn2+ and Cr2+ were the heavy metals in the leachates. The sorption selectivity order for tested soils depended on the soil type and properties.
    Źródło:
    Environment Protection Engineering; 2017, 43, 4; 209-222
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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