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Wyświetlanie 1-15 z 39
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:
Using the ARP-03 for high-resolution mapping of calcic horizons
Autorzy:
Priori, S.
Fantappie, M.
Magini, S.
Costantini, E.A.C.
Powiązania:
https://bibliotekanauki.pl/articles/24650.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
The aim of this work is to present a fast and cheap method for high-resolutionmapping of calcic horizons in vineyards based on geoelectrical proximal sensing. The study area, 45 ha located in southern Sicily (Italy), was characterized by an old, partially dismantled marine terrace and soils with a calcic horizon at different depths. The geoelectrical investigation consisted of a survey of the soil electrical resistivity recorded with the Automatic Resistivity Profiling-03 sensor. The electrical resistivity values at three pseudo-depths, 0-50, 0-100 and 0-170 cm, were spatialized by means of ordinary kriging. A principal component analysis of the three electrical resistivity maps was carried out. During the survey, 18 boreholes, located at different electrical resistivity values, were made for soil description and sampling. The depth to the calcic horizon showed a strong correlation with electrical resistivity. The regression model between calcic horizon and the principal component analysis factors with the highest correlation coefficients was selected to spatialise the calcic horizon values. An Normalized Difference Vegetation Index map was used to validate the calcic horizon map in terms of crop response to different soil rooting depths. The strengths of this method are the quick, non-invasive kind of survey, the relevance for vine vigour, and the high spatial resolution of the final map.
Źródło:
International Agrophysics; 2013, 27, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic rheology and microstructure of starch gels affected by triticale genomic composition and developing stage
Autorzy:
Cornejo-Ramirez, Y.I.
Cinco-Moroyoqui, F.J.
Carvajal-Millan, E.
Brown-Bojorquez, F.
Rosas-Burgos, E.C.
Burgos-Hernandez, A.
Martinez-Cruz, O.
Del Toro-Sanchez, C.L.
Powiązania:
https://bibliotekanauki.pl/articles/24257.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2019, 33, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New trends for reference evapotranspiration and climatic water deficit
Autorzy:
Paltineanu, C.
Chitu, E.
Mateescu, E.
Powiązania:
https://bibliotekanauki.pl/articles/24153.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
The paper deals with the trend for Penman- Monteith reference evapotranspiration and climatic water deficit during the first decade of the 21st century in Southern Romania vs the 20th century. For the first half of the year the monthly evapotranspiration values were higher for the first decade of the 21st century vs the means of the 20th century. However, the trend reverses for the second half of the year, but for the whole year the totals were higher for the first decade of the 21st century vs the totals of the 20th century. The yearly temperature means in the first decade of the XXI century showed an increase in the three locations studied, respectively, vs century XX. This warming is responsible to a great extent for the increase in evapotranspiration, and the relationship between evapotranspiration and temperature was highly significant. Water deficit decreased in Constanta and Pitesti, but there was a slight increase in water deficit in the same period in Bucharest-Baneasa. Water deficit increased in the first half of the year and decreased in the second half during the first decade of century XXI in all the three locations investigated vs century XX.
Źródło:
International Agrophysics; 2012, 26, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Procedure to control hydraulic potential variation in soil microcosms
Autorzy:
Agostinni, F
Shmidt, C.S.
Mullins, C.E.
Leifert, C.
Powiązania:
https://bibliotekanauki.pl/articles/24999.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
procedure
hydraulic potential variation
soil
microcosm
biological control
soil water content
water regime
soil texture
Źródło:
International Agrophysics; 2009, 23, 3; 215-227
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of tillage tool geometry on soil structural stiffness
Autorzy:
Ijioma, C.I.
McKyes, E.
Powiązania:
https://bibliotekanauki.pl/articles/26263.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil behaviour
tillage
soil
tool geometry
soil property
soil stiffness
Źródło:
International Agrophysics; 1995, 09, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Field validation of DNDC and SWAP models for temperature and water content of loamy and sandy loam Spodosols
Autorzy:
Balashov, E.
Buchkina, N.
Rizhiya, E.
Farkas, C.
Powiązania:
https://bibliotekanauki.pl/articles/972349.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
field validation
agroecosystem
modelling
soil water content
soil temperature
DNDC model
SWAP model
temperature
water content
loamy sand
sandy loam
Spodosol
Opis:
The objectives of the research were to: fulfil the preliminary assessment of the sensitivity of the soil, water, atmosphere, and plant and denitrification and decomposition models to variations of climate variables based on the existing soil database; validate the soil, water, atmosphere, and plant and denitrification and decomposition modelled outcomes against measured records for soil temperature and water content. The statistical analyses were conducted by the sensitivity analysis, Nash-Sutcliffe efficiency coefficients and root mean square error using measured and modelled variables during three growing seasons. Results of sensitivity analysis demonstrated that: soil temperatures predicted by the soil, water, atmosphere, and plant model showed a more reliable sensitivity to the variations of input air temperatures; soil water content predicted by the denitrification and decomposition model had a better reliability in the sensitivity to daily precipitation changes. The root mean square errors and Nash-Sutcliffe efficiency coefficients demonstrated that: the soil, water, atmosphere, and plant model had a better efficiency in predicting seasonal dynamics of soil temperatures than the denitrification and decomposition model; and among two studied models, the denitrification and decomposition model showed a better capability in predicting the seasonal dynamics of soil water content.
Źródło:
International Agrophysics; 2014, 28, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characteristics of organic matter in selected profiles from the Gezira Vertisols as determinated by thermogravimetry
Autorzy:
Elias, E.A.
F, Alaily
Siewert, C.
Powiązania:
https://bibliotekanauki.pl/articles/24822.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2002, 16, 4; 269-275
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Root density of cherry trees grafted on Prunus mahaleb in a semi-arid region
Autorzy:
Paltineanu, C.
Septar, L.
Gavat, C.
Chitu, E.
Oprita, A.
Moale, C.
Lamureanu, G.
Vrinceanu, A.
Powiązania:
https://bibliotekanauki.pl/articles/25650.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
root density
root distribution
soil property
cherry tree
grafted rootstock
generative rootstock
Prunus mahaleb
semi-arid region
Źródło:
International Agrophysics; 2016, 30, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterising root density of peach trees in a semi-arid Chernozem to increase plant density
Autorzy:
Paltineanu, C.
Septar, L.
Gavat, C.
Chitu, E.
Oprita, A.
Moale, C.
Calciu, I.
Vizitiu, O.
Lamureanu, G.
Powiązania:
https://bibliotekanauki.pl/articles/24890.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
root density
peach tree
black earth
plant density
root distribution
soil property
trench method
Źródło:
International Agrophysics; 2016, 30, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial variability of uncultivated soils in derived savanna
Autorzy:
Obalum, S.E.
Oppong, J.
Igwe, C.A.
Watanabe, Y.
Obi, M.E.
Powiązania:
https://bibliotekanauki.pl/articles/25426.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
The spatial variability of some physicochemical properties of topsoils/subsoils under secondary forest, grassland fallow, and bare-soil fallow of three locations was evaluated. The data were analyzed and described using classical statistical parameters. Based on the coefficient of variation, bulk density, total porosity, 60-cm-tension moisture content, and soil pH were of low variability. Coarse and fine sand were of moderate variability. Highly variable soil properties included silt, clay, macroporosity, saturated hydraulic conductivity, organic matter concentration, and cation exchange capacity. Overall, soil pH and silt varied the least and the most, respectively. Relative weighting showed that location dominantly influenced the soil variability, except for soil porosity and organic matter concentration influenced mostly by land use. Most of the soil data were normally distributed; others were positively skewed and/or kurtotic. The minimum number of samples (at 25 samples ha-1) required to estimate mean values of soil properties was highly soil property-specific, ranging from 1 (topsoil pH-H2O) to 246 (topsoil silt). Cation exchange capacity of subsoils related fairly strongly with cation exchange capacity of topsoils (R2 = 0.63). Spatial variability data can be used to extrapolate dynamic soil properties across a derived-savanna landscape.
Źródło:
International Agrophysics; 2013, 27, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in the hydrophysical properties of peat soils under anthropogenic evolution
Autorzy:
Rovdan, E.
Witkowska-Walczak, B.
Walczak, R.
Slawinski, C.
Powiązania:
https://bibliotekanauki.pl/articles/24801.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
hydraulic conductivity
peat soil
hydrophysical property
anthropogenic evolution
water retention
Źródło:
International Agrophysics; 2002, 16, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Puddling intensity for late-season sawah systems based on soil hydrophysical conditions and rice performance
Autorzy:
Obalum, S.E.
Watanabe, Y.
Igwe, C.A.
Obi, M.E.
Wakatsuki, T.
Powiązania:
https://bibliotekanauki.pl/articles/26457.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
puddling intensity
late-season sawah system
soil condition
hydrophysical condition
rice
grain yield
Oryza sativa
performance
Opis:
Lowland sawah farmers often puddle to improve soil hydrophysical conditions for rice, but the puddling intensity beyond which no extra yield increases occur is unknown. Agro- nomic effects of six mechanical puddling intensities were assessed in three Nigerian inland-valley bottoms. All puddled plots, irrespec- tive of intensity, produced similar effects at all three locations. At 10 days after transplanting, soil bulk density of all puddled plots re- presented mean decreases relative to control plots of about 22.4, 15.8, and 31.7% at Akaeze, Adani, and Ejeti, respectively. Soil bulk density and moisture content upon saturation were similar during 40-120 days after transplanting. All puddled plots consistently showed taller plants and greater tillering than control plots only at Ejeti. Grain yields were similar among treatments in Akaeze and Adani (mean, 3.71 and 6.42 Mg ha -1 , respectively), but one-pass puddling yielded numerically highest in both locations. At Ejeti, grain yields followed the trend for plant growth, with mean values of 4.36 and 1.81 Mg ha -1 for puddled and control plots, respecti- vely. One-pass puddling may be sufficient for sawah rice grown late particularly in less humid environments.
Źródło:
International Agrophysics; 2014, 28, 3
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 39

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