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Effect of tillage tool geometry on soil porosity

100%

Ijioma C. I.

International Agrophysics

|

1992

|

tom 06

|

nr 1-2

2

Fluctuations of depth of land drainage in Uhnin grassland in years 2011–2012

86%

Grzywna A.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

|

2013

|

tom 10

3

Effect of the ploughing depth and the weed control method on the winter oilseed rape yield

86%

Jankowski K. J., Budzynski W. S.

Acta Scientiarum Polonorum. Agricultura

|

2003

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tom 02

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nr 1

The effect of differentiated pre-sow ploughing depth (30, 20 and 10 cm) and weed control method (mechanical, chemical, combined mechanical and chemical) on the overwintering, weed infestation, yield and quality of seeds of oilseed rape was tested. Shallower ploughing worsened the main traits of the autumn condition of rape plants. Rape plants treated chemically had better-formed rosettes than those treated mechanically. Ploughing made to the depth of 30 and 20 cm did not significantly differentiate the yield of rape plants. However, a significant decrease (9-13%) in the yield occurred when the ploughing depth went down to 10 cm. The highest yield was obtained from the rape controlled chemically against weeds. The yield-protective effect of the combined mechanical and chemical weed control was comparable to that of mechanical method.

4

Depth of carriageway and cut slopes on forest roads

72%

Potocnik I.

Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa

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2005

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tom 91

67-73

5

Phyllotaxis instability - exploring the depths of first available space

72%

Szpak M., Zagorska-Marek B.

Acta Societatis Botanicorum Poloniae

|

2011

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tom 80

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nr 4

The theoretical analysis of the consequences of the phyllotactic pattern being propagated according to the first available space rule has revealed that all monojugate patterns, with the exception of the main Fibonacci pattern, should become developmentally unstable in their low expressions. This fact explains why the main Fibonacci pattern plays the dominant role among other patterns of spiral phyllotaxis. The probability that the pattern becomes unstable varies for different patterns, which likely makes them more or less frequent, and thus easier or more difficult to encounter in nature. The unstable pattern inevitably transforms into another, as the computer simulations show. Theoretically predicted instability of low order phyllotaxis may be treated as one of the causes of natural ontogenetic transitions, occurring in plants. This, however, still does not explain why in nature some patterns with high order of phyllotaxis also change, quite readily one into the other, in shoot apical meristem’s ontogeny.

6

Seasonal dependence of changes in snow cover depth on directions of air-flows

72%

Bednorz E.

Quaestiones Geographicae

|

2000

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tom 21

7

Model of the in vivo spectral absorption of algal pigments. Part 2. Practical applications of the model

72%

Majchrowski R., Wozniak B., Dera J., Ficek D., Kaczmarek S., Ostrowska M., Koblentz-Mishke O. I.

Oceanologia

|

2000

|

tom 42

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nr 2

The article describes applications and accuracy analyses of a statistical model of light absorption by phytoplankton that accounts for the influence of photo- and chromatic acclimation on its absorption properties. Part 1 of this work (seeWoźniak et al. 2000, this volume) describes the mathematical apparatus of the model. Earlier models by Woźniak & Ostrowska (1990) and by Bricaud et al. (1995, 1998) are analysed for comparison. Empirical verification of these three models shows that the new model provides a much better approximation of phytoplankton absorption properties than do the earlier models. The statistical errors in estimating the mean absorption coefficient apl, for example, are σ+ = 36% for the new model, whereas for the earlier models the figures are σ+ = 43% (Bricaud et al. 1995, 1998) and σ+ = 59% (Woźniak & Ostrowska 1990). Example applications are given of the new model illustrating the variability in phytoplankton absorption properties with depth and trophicity of the sea.

8

Deep compaction alleviation using lower powered tractors

72%

Spoor G.

Bibliotheca Fragmenta Agronomica

|

1997

|

tom 2B

9

The misalignment angle in vessel-mounted ADCP

72%

Osinski R.

Oceanologia

|

2000

|

tom 42

|

nr 3

A description of the misalignment angle and the consequences if it occurs is given. It is shown that because of gyrocompass errors, the misalignment angle error α has to be computed for each cruise. A simple method of calibrating the acoustic Doppler current profiler (ADCP) mounted on a vessel has been devised by fitting the cosinusoidal function. This is a post-processing method, suitable for calibrating previously collected data. Nevertheless, because of ADCP’s constructional peculiarities, the procedure must be repeated for each cruise.

10

Effects of tillage methods and depth on fuel consumption and profitability of late season okra productions

72%

Asoegwu S. N.

International Agrophysics

|

1999

|

tom 13

|

nr 1

11

Variation of physical and mechanical properties with depth in Alfisols

72%

Panayiotopoulos K. P., Kostopoulou S., Hatjiyiannakis E.

International Agrophysics

|

2004

|

tom 18

|

nr 1

12

Investigations and analyses of spatial variability of soil temperature

72%

Usowicz B., Walczak R.

International Agrophysics

|

1992

|

tom 06

|

nr 1-2

13

An attempt to classify groundwater level depth in pine forest stands on fresh sites

58%

Okonski B., Grajewski S., Kayzer D.

Infrastruktura i Ekologia Terenów Wiejskich

|

2009

|

nr 07

The aim of the research described in this paper is to classify groundwater level patterns in pine stands of forest fresh sites. The approach has been employed with the view to facilitate explaining interactions between physiographic characteristics and groundwater dynamics in prospective research. The methods which have been employed so far for explanation of groundwater level dynamics interactions with local physiographic conditions do not let to draw firm conclusions. The classification of groundwater dynamics patterns requires employing more sophisticated methods, because of a relatively extensive range of groundwater dynamics site-to-site variability expressed, e.g., by amplitude and cycle period. The methods of groundwater patterns classification proposed in the literature focused either on hydrogeological criteria or, if related to forest ecosystems, focused on water balance elements in forest habitats. The area selected for investigation represented typical features for the Northern European Lowland forests defined by soil and form of terrain pattern shaped by the last glacial period (Vistulian glaciation) and dominant share of Scots Pine (Pinus sylvestris L.) in stand species composition. The research period covered the 2002-2007 hydrological years. The measurement used in analysis covered 35 sites equipped with measurement wells.

14

Pre-Quaternary geomorphological history and geoheritage of Britain

58%

Migon P., Goudie A.

Quaestiones Geographicae

|

2012

|

tom 31

|

nr 1

15

Influence of the local abiotic environment, weather and regional nutrient loading on macrobenthic invertebrate feeding groups in a shallow brackish water ecosystem

58%

Veber T., Kotta J., Lauringson V., Kotta I.

Oceanologia

|

2009

|

tom 51

|

nr 4

This study evaluated the extent to which depth, sediment type, exposure to waves and coastal slope inclination modulate the relationships between regional nutrient loading, weather patterns and the species composition and dominance structure of macrobenthic invertebrate feeding groups in a brackish water ecosystem of the Baltic Sea. Irrespective of feeding function, the species composition and dominance structure of benthic invertebrate communities were determined by local abiotic variables such as exposure, depth and sediment type. Regional weather variables (average southerly winds, salinity, water temperature, ice conditions) either separately or interactively contributed to the variability of benthic invertebrates. Nutrient loading had significant effects on benthic invertebrates only in interactions with local abiotic or regional weather variables. Herbivores, deposit feeders and suspension feeders exhibited a stronger response to the studied environmental variables than carnivores. All this suggests that (1) the dynamic coastal habitats studied in this work are not very sensitive to shifts in nutrient loading and (2) local abiotic conditions and weather patterns largely define the observed biotic patterns. We believe that the benthic invertebrate time series will only be a better reflection of the nutrient loading signal if more years covering extreme events are included.

16

Critical depth concept: current state and prospects

58%

Szeligiewicz W.

Acta Hydrobiologica

|

1999

|

tom 41

|

nr Suppl.6

17

The influence of waterlogging at different temperatures on penetration depth and porosity of roots and on stomatal diffusive resistance of pea and maize seedlings

58%

Przywara G., Stepniewski W.

Acta Physiologiae Plantarum

|

1999

|

tom 21

|

nr 4

18

Influence of land preparing and fertilization works before tree planting on apple growth and fruiting

58%

Iancu M.

Bibliotheca Fragmenta Agronomica

|

1997

|

tom 2A

19

Variability of the specific fluorescence of chlorophyll in the ocean. Part 1. Theory of classical in situ chlorophyll fluorometry

58%

Ostrowska M., Majchrowski R., Matorin D. N., Wozniak B.

Oceanologia

|

2000

|

tom 42

|

nr 2

The range of variability of the fluorescence properties of marine phytoplankton in different trophic types of seas and at different depths in the sea is analysed theoretically. An attempt is also made to interpret artificially induced in situ fluorescence measured with submersible fluorometers. To do this, earlier optical models of light absorption by phytoplankton (see Woźniak et al. 2000, this volume) and actual empirical data were applied. A straightforward theoretical model of artificially photoinduced phytoplankton fluorescence accounting for the complex influence of different photophysiological characteristics of phytoplankton and the optical characteristics of the instrument has been worked out. A physical method of determining chlorophyll a concentrations in seawater from fluorescence measured in situ with contact fluorometers can be based on this model.

20

Influence of tillage on iron, aluminium and manganese distribution along depth of soils

58%

Jokova M. Y., Dilkova R. S.

Bibliotheca Fragmenta Agronomica

|

1997

|

tom 2A

Ograniczanie wyników

Effect of tillage tool geometry on soil porosity

Fluctuations of depth of land drainage in Uhnin grassland in years 2011–2012

Effect of the ploughing depth and the weed control method on the winter oilseed rape yield

Depth of carriageway and cut slopes on forest roads

Phyllotaxis instability - exploring the depths of first available space

Seasonal dependence of changes in snow cover depth on directions of air-flows

Model of the in vivo spectral absorption of algal pigments. Part 2. Practical applications of the model

Deep compaction alleviation using lower powered tractors

The misalignment angle in vessel-mounted ADCP

Effects of tillage methods and depth on fuel consumption and profitability of late season okra productions

Variation of physical and mechanical properties with depth in Alfisols

Investigations and analyses of spatial variability of soil temperature

An attempt to classify groundwater level depth in pine forest stands on fresh sites

Pre-Quaternary geomorphological history and geoheritage of Britain

Influence of the local abiotic environment, weather and regional nutrient loading on macrobenthic invertebrate feeding groups in a shallow brackish water ecosystem

Critical depth concept: current state and prospects

The influence of waterlogging at different temperatures on penetration depth and porosity of roots and on stomatal diffusive resistance of pea and maize seedlings

Influence of land preparing and fertilization works before tree planting on apple growth and fruiting

Variability of the specific fluorescence of chlorophyll in the ocean. Part 1. Theory of classical in situ chlorophyll fluorometry

Influence of tillage on iron, aluminium and manganese distribution along depth of soils