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Wyświetlanie 1-15 z 124
Tytuł:
Effect of management of a volcanic ash soil on structural properties
Autorzy:
Ellies, A.
Horn, R.
Smith, R.
Powiązania:
https://bibliotekanauki.pl/articles/26609.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil
volcanic ash soil
soil management
structural property
Źródło:
International Agrophysics; 2000, 14, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient soil solarization for weed control in the rain-fed upland rice ecosystem
Autorzy:
Khan, A.R.
Srivastava, R.C.
Ghorai, A.K.
Singh, S.R.
Powiązania:
https://bibliotekanauki.pl/articles/25142.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
environment
soil
ground water
weed competition
crop yield
herbicide
solarization
ecosystem
rainfed upland
weed control
toxic residue
rice
Źródło:
International Agrophysics; 2003, 17, 3
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:
Effect of penetration resistance, bulk density and moisture content of soil on selected yield components of winter triticale in relation to method of cultivation
Autorzy:
Weber, R.
Biskupski, A.
Powiązania:
https://bibliotekanauki.pl/articles/25246.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Źródło:
International Agrophysics; 2008, 22, 1; 171-177
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of salt stress on growth and frost resistance of three winter cereals
Autorzy:
Matuszak-Slamani, R.
Brzostowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/26365.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
This paper presents results of a study on the in-fluence of 0-150 mmol NaCl dm-3 Hoagland solution on growth, chlorophyll content, photosynthesis and frost resistance of seed-lings of three winter cereals: wheat – cv. Almari, rye – cv. Amilo, and triticale – cv. Tornado. Sodium chloride at 25 mmol dm-3 caused better growth of wheat shoots and roots, both of fresh and dry matter. Higher concentrations of NaCl in the medium decreased the biomass of the tested seedlings. The influence of NaCl on the chlorophyll content in the seedlings varied. The conductometry method showed that the resistance of the cell walls of wheat and rye to low temperature decreased in the presence of NaCl in the growth medium. Luminescence has shown that seedlings that grew in NaCl-containing medium indicatedan impediment of electron flow at a lower temperature than the control plants.
Źródło:
International Agrophysics; 2015, 29, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparing the potentials of clay and biochar in improving water retention and mechanical resilience of sandy soil
Autorzy:
Ajayi, A.E.
Horn, R.
Powiązania:
https://bibliotekanauki.pl/articles/25030.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
Changing climate is threatening rainfall regularity particularly in the semi-arid and arid regions; therefore, strategies to conserve water within their coarse-grained soils and to improve water use efficiency of crops are critical. This study compared the effectiveness of biochar and two types of clay materials in augmenting water retention and improving mechanical resilience of fine sand. The amendment of fine sand with woodchip-biochar and kaolinite (non-swelling clay) and Na-bentonite (swelling clay) improved the water retention capacity and interparticle bonding of the substrate depending of the rate of amendment and water content of the substrates. Na-bentonite was more effective at increasing water retention capacity at more negative matric potentials. Biochar was more effective at saturation due to the increased porosity, while kaolinite responds similarly to biochar. It is, however, shown that most of the water retained by the Na-betonite may not be available to plants, particularly at high amendment rate. Furthermore, the clay and biochar materials improved particle bonding in the fine sand with the Na-bentonite being more effective than biochar and kaolinite (in that order) in strengthening interparticle bonds and improving the resilience of fine sand, if the rate of amendment is kept at ≤50 g kg-1.
Źródło:
International Agrophysics; 2016, 30, 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:
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:
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:
Quantity of hydrophobic functional CH-groups - decisive for soil water repellency caused by digestate amendment
Autorzy:
Voelkner, A.
Holthusen, D.
Ellerbrock, R.H.
Horn, R.
Powiązania:
https://bibliotekanauki.pl/articles/24134.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Opis:
Anaerobic digestates are used as organic fertilizers; however, they are suspected to interfere negatively with soils.To investigate the relevance of the anaerobic digestates composition on potential wettability and contact angle of the soil, we mixed in a laboratory experiment 30 m³ ha-1 of anaerobic digesta-tes derived from mechanically pre-treated substrates from maizeand sugar beet with a homogenized Cambic Luvisol. Fourier trans-form infrared-spectra and diffuse reflectance infrared Fouriertransform-spectra of particle intact and finely ground soil-anaerobic digestates-mixtures were analyzed to determine the quantities of hydrophobic functional groups in the soil-anaerobic digestates-mixtures that are used here as an indicator for the potential hydrophobicity. The anaerobic digestates application increased the amount of hydrophobic functional groups of the mixtures and reduced the wettability of the soil. However, for intact particle samples an up to threefold higher amount of hydrophobic groups was found as compared to the finely ground ones, indicating a dilution effect of mechanical grinding on the effectivity of the organic matter that is presumably located as a coating on mineral soil particles. For the particle intact samples, the intensity of hydrophobic functional groups bands denoting hydrophobic brickstones in organic matter is indicative for the actual wettability of the soil-anaerobic digestates-mixtures.
Źródło:
International Agrophysics; 2015, 29, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
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:
Tensile strength and relaxation of tomato skin by a loop technique
Autorzy:
Rajabipour, A.
Zariefard, M.R.
Dodd, G.T.
Norris, E.R.
Powiązania:
https://bibliotekanauki.pl/articles/26629.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
relaxation
skin cracking
loop technique
tomato skin
tensile strength
fruit cracking
Źródło:
International Agrophysics; 2004, 18, 2
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 124

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