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Wyświetlanie 1-15 z 21
Tytuł:
Modelling infiltration rate in conditioned soil: comparisons and modifications
Autorzy:
Nnabude, P.C.
Agunwamba, J.C.
Mbagwu, J.S.C.
Powiązania:
https://bibliotekanauki.pl/articles/25116.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
model
agricultural land
waste application
soil
infiltration dynamics
conditioned soil
modelling infiltration
modification
Źródło:
International Agrophysics; 2000, 14, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reduction in organic matter fractions and structural stability following cultivation of tropical forests in Ethiopia and Nigeria
Autorzy:
Mbagwu, J.S.C.
Piccolo, A.
Powiązania:
https://bibliotekanauki.pl/articles/25479.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
organic matter
Ethiopia
tropical soil
soil
tropical forest
aggregate stability
Nigeria
Źródło:
International Agrophysics; 2004, 18, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some factors affecting clay dispersion and aggregate stability in selected soils of Nigeria
Autorzy:
Mbagwu, J.S.C.
Schwertmann, U.
Powiązania:
https://bibliotekanauki.pl/articles/25842.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil aggregation
organic matter
aggregated clay
soil
chemical extractant
clay dispersion
aggregate stability
Nigeria
Źródło:
International Agrophysics; 2006, 20, 1
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:
Laser-scanner used in a wind tunnel to quantify soil erosion
Autorzy:
Asensio, C.
Weber, J.
Lozano, F.J.
Mielnik, L.
Powiązania:
https://bibliotekanauki.pl/articles/2082510.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil roughness
tilled soils
wind erosion
soil
loss
Opis:
A methodology was developed in order to estimate wind erosion by comparing the differences in soil loss with a 3D laser scanner inside a wind tunnel, to relate the change in soil micro-relief to soil loss. We evaluated the effectiveness of a low-cost laser scanner in a wind tunnel for examining the winddependent variation in soil surface micro-topography, thereby enabling soil wind erosion to be quantified both quickly and accurately. We, therefore, studied the effect of soil crusting in an intensive horticultural crop, low-tilled soil (once a year) in cereal cultivation, and tilled soil (several times a year) in an ecological citrus orchard, paying attention to the changes occurring when soils are tilled. Moreover, we observed an aggregation effect of CaCO3 in the wind-erodible fraction, a protective effect of surface stoniness against a direct impact of wind and the incidence of soil particle content. Different behaviour, in terms of random roughness, is due to more stones and/or remnant vegetation being highly resistant to wind in Calcisol, Cambisol, Fluvisol and Arenosol plots, thus increasing surface roughness. In Anthrosol and Leptosol plots, on the contrary, initial roughness was due to large unstable and wind-eroded aggregates which resulted in a decreased surface roughness.
Źródło:
International Agrophysics; 2019, 33, 2; 227-232
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Water conductivity of Arctic zone soils (Spitsbergen)
Autorzy:
Witkowska-Walczak, B.
Slawinski, C.
Bartminski, P.
Melke, J.
Cymerman, J.
Powiązania:
https://bibliotekanauki.pl/articles/25209.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
water conductivity
soil
grain size
distribution
pore size
Arctic zone
Spitsbergen
Opis:
The water conductivity of arctic zone soils derived in different micro-relief forms was determined. The greatest water conductivity at the 0-5 cm depth for the higher values of water potentials (> -7 kJ m-3) was shown by tundra polygons (Brunic-Turbic Cryosol, Arenic) – 904-0.09 cm day-1, whereas the lowest were exhibited by Turbic Cryosols – 95-0.05 cm day-1. Between -16 and -100 kJ m-3, the water conductivity for tundra polygons rapidly decreased to 0.0001 cm day-1, whereas their decrease for the other forms was much lower and in consequence the values were 0.007, 0.04, and 0.01 cm day-1 for the mud boils (Turbic Cryosol (Siltic, Skeletic)), cell forms (Turbic Cryosol (Siltic, Skeletic)), and sorted circles (Turbic Cryosol (Skeletic)), respectively. In the 10-15 cm layer, the shape of water conducti-vity curves for the higher values of water potentials is nearly the same as for the upper layer. Similarly, the water conductivity is the highest – 0.2 cm day-1 for tundra polygons. For the lower water potentials, the differences in water conductivity increase to the decrease of soil water potential. At the lowest potential the water conductivity is the highest for sorted circles – 0.02 cm day-1 and the lowest in tundra polygons – 0.00002 cm day-1.
Źródło:
International Agrophysics; 2014, 28, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Number and Activity of Microorganisms in Soil Inoculated With the Rhizocell C Biopreparation In Strawberry Cultivation (Fragaria × Ananasa Duch.)
Autorzy:
Hawrot-Paw, M.
Mikiciuk, G.
Mikiciuk, M.
Izwikow, M.
Kiniorska, J.
Powiązania:
https://bibliotekanauki.pl/articles/125351.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
biopreparation
microorganisms
biological activity
soil
Rhizocell C
Opis:
An experiment involving vegetation pots was conducted to assess the effect of inoculating the soil with the Rhizocell C biopreparation, which includes bacteria from the genus Bacillus amyloliquefaciens IT45, on the number and activity of selected groups of soil microorganisms. The biopreparation was applied in strawberries (Fragaria × ananasa Duch.) in a dose recommended by the manufacturer. Microbiological analyses were conducted four times during the vegetation of plants. The obtained results led to a conclusion that the use of biopreparation affects biological activity of soil, and a majority of the observed changes were beneficial. The mean number of the most microorganisms after Rhizocell C biopreparation was higher than in the control object. Soil inoculation had an influence on the activity of microorganisms determined based on biomass content, but the differences were not significant.
Źródło:
Journal of Ecological Engineering; 2016, 17, 2; 135-140
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Soil wind erosion characterization in south-eastern Spain using traditional methods in front of an innovative type of dust collector
Autorzy:
Guerrero, R.
Valenzuela, J.L.
Torres, J.L.
Lozano, J.
Asensio, C.
Powiązania:
https://bibliotekanauki.pl/articles/2082948.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
dust collector
semi-arid environment
tilled
soil
unploughed soil
wind tunnel
Opis:
The movement of soil particles by the wind can be measured using wind tunnels and collectors, or dust traps. We tested both in Southeast Spain in order to compare movement in four types of soil. Our tests were carried out in a well-tilled orchard on an Anthrosol, an unploughed Leptosol and Arenosol, and finally on an olive-cropped Cambisol. We estimated soil loss using a wind tunnel with a built-in laser-scanner, and then compared the results with records from nine vaned masts, each with four big spring number eight collectors at different heights, and the same for another nine masts but with a new type of dust trap known as the multidirectional. The collectors can differentiate between overall loss and particle deposition, which is not detectable on a larger scale in the tunnel. The results from the big spring number eight traps and our wind tunnel showed a high degree of correlation (R² = 0.933) and an even closer correlation with the multidirectional trap (R² = 0.978). Moreover, the new multidirectional trap collectors are very efficient and easy to manufacture from thermoplastic filaments with an industrial 3D printer.
Źródło:
International Agrophysics; 2020, 34, 4; 503-510
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
State-space estimation of soil organic carbon stock
Autorzy:
Timm, L.C.
Ogunwole, J.O.
Obidike-Ugwu, E.O.
Gabriels, D.M.
Powiązania:
https://bibliotekanauki.pl/articles/26250.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil
organic carbon
variability
component analysis
organic matter
agricultural management
Opis:
Understanding soil spatial variability and identifying soil parameters most determinant to soil organic carbon stock is pivotal to precision in ecological modelling, prediction, estimation and management of soil within a landscape. This study investigates and describes field soil variability and its structural pattern for agricultural management decisions. The main aim was to relate variation in soil organic carbon stock to soil properties and to estimate soil organic carbon stock from the soil properties. A transect sampling of 100 points at 3 m intervals was carried out. Soils were sampled and analyzed for soil organic carbon and other selected soil properties along with determination of dry aggregate and water-stable aggregate fractions. Principal component analysis, geostatistics, and state-space analysis were conducted on the analyzed soil properties. The first three principal components explained 53.2% of the total variation; Principal Component 1 was dominated by soil exchange complex and dry sieved macroaggregates clusters. Exponential semivariogram model described the structure of soil organic carbon stock with a strong dependence indicating that soil organic carbon values were correlated up to 10.8m.Neighbouring values of soil organic carbon stock, all waterstable aggregate fractions, and dithionite and pyrophosphate iron gave reliable estimate of soil organic carbon stock by state-space.
Źródło:
International Agrophysics; 2014, 28, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial characteristics of water conductivity in the surface level of Polish arable soils
Autorzy:
Walczak, R
Ostrowski, J.
Witkowska-Walczak, B.
Slawinski, C.
Powiązania:
https://bibliotekanauki.pl/articles/26447.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
surface level
Polska
water permeability
soil
water conductivity
water retention
arable soil
water balance
Źródło:
International Agrophysics; 2002, 16, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial characteristic of hydro-physical properties in arable mineral soils in Poland as illustrated by field water capacity [FWC]
Autorzy:
Walczak, R.
Ostrowski, J.
Witkowska-Walczak, B.
Slawinski, C.
Powiązania:
https://bibliotekanauki.pl/articles/26253.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
mineral soil
field water capacity
Polska
hydrophysical property
soil
Źródło:
International Agrophysics; 2002, 16, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of humic substances in humid subalpine forest soils in Central Taiwan
Autorzy:
Chen, J S
Chiu, C.Y.
Powiązania:
https://bibliotekanauki.pl/articles/1450325.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
subalpine forest
temperature
humic acid
humification
humic substance
soil
Taiwan
ecosystem
forest soil
terrestrial ecosystem
fulvic acid
Opis:
The study site, 2700 m a.s.l., is located in the central Taiwan. A globally rare combination of the mean temperature (ca. 9.5 °C) and total annual precipitation (ca. 4100 mm) makes studies on pedogenic and edaphic processes of the moist soils in this area worthwhile. The study was undertaken to investigate distribution and characteristics of humic substances in this subalpine forest ecosystem. Fulvic acids comprised a higher total organic carbon fraction (1.8 to 25%) than humic acids (1.1 to 13.4%). Fulvic acids were more mobile and migrated downwards to deeper horizons. Comparatively, humic acids were distributed more in the surface horizons. The hu- mification index, based on E4/E6, showed that humification varied in different horizons even in the same profile. The AlogK and RF values indicate that the types of humic acids extracted from Tsuga forest soil are grouped as P or A types, whereas Rp or B types are in Picea forest soil, suggesting a high degree of humification of humic acids in such soils. Features of the absorption spectra were consistent with the classification of humic acids with A logK and RF values. Humification indices and humic acid types in these subalpine soils indicate that they are similar to acidic soils elsewhere with abundant rainfall and cold climate.
Źródło:
Acta Agrophysica; 2001, 50; 41-47
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial characteristics of potentially useful retention in Polish arable soils
Autorzy:
Walczak, R
Ostrowski, J.
Witkowska-Walczak, B.
Slawinski, C.
Powiązania:
https://bibliotekanauki.pl/articles/25637.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
retention
soil water
Polska
hydrophysical property
soil
soil property
plant growth
potentially useful retention
arable soil
Źródło:
International Agrophysics; 2002, 16, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of bispyribac sodium 10 % SC (herbicide) residue level in straw, grain and soil using HPLC method
Autorzy:
Tamilselvan, C.
Joseph, S.J.
Angayarkanni, V.
Powiązania:
https://bibliotekanauki.pl/articles/11935.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
determination
bispyribac sodium
herbicide residue
residue level
straw
grain
soil
high performance liquid chromatography
Opis:
A field trial was conducted to evaluate the residues of Bispyribac sodium 10 % SC on rice crop during Kharif season 2013 at Kandikai in Thiruvallur District, Tamilnadu, India. Randomized block design was followed withthree treatments forthree replicates. Bispyribac sodium 10 % SC 200 g a.i./ha, 500 g a.i./ha and control (water spray) was sprayed using hand operated Maax battery sprayer with a spray volume of 300 litres per hectare at 15 days after transplantation of rice crop (ADT 45). At harvest, samples of grain, straw and soil were collected replicate wise from each treatment along with the control. These samples were stored in icebox and transfer to the laboratory under cooled condition for analysis.All the residues samples were analyzed for Bispyribac sodium content by a validated HPLC method at the minimum detectable concentration of 0.01 ppm. The result revealed that no detectable level of Bispyribac sodium in straw, grain and soil at harvest. Thepost treatmentand pre-harvest intervalwas 60 days after transplantation.
Źródło:
International Letters of Natural Sciences; 2014, 12, 1
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cadmium contents in the soils and plants cultivated in the ecologically hazardous regions
Autorzy:
Jasiewicz, C
Antonkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1448727.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
hazardous region
Silesian region
straw
grain
cadmium content
ecologically hazardous region
soil
barley
cadmium
soil property
degraded ecosystem
anthropogenic ecosystem
plant
Opis:
The studies comprised 20 points localised in four communities of the Silesian province The aim of the investigations was to assess cadmium contents in soils, grain and straw of spring barley cultivated in the ecologically hazardous region and to describe relations between this metal contents in the soils and indicative parts of barley. It was found out that 27 of the examined soils were characterised by an increased cadmium contents, 69 of the soils were slightly contaminated and 8 of them showed medium contamination. In 42 grain samples of barley the permissible dose was exceed in the plants appropriated for consumption. A significant relationship was found between cadmium contents in the soils and their granulometric composition. Significant relationships were also registered between cadmium concentration in the soil and its contents in barley. Cadmium contents in grain was significantly correlated with organic carbon and clay fraction. However for straw, significant relations were found between cadmium contents and granulometric composition, reaction and organic matter contents.
Źródło:
Acta Agrophysica; 2001, 51; 85-90
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

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