scholarly journals Changes of segetal vegetation of the Piotrków Plain during the last 22 years. Part III. Weed communities of stubble fields

2013 ◽  
Vol 47 (1) ◽  
pp. 55-65
Author(s):  
A. Urszula Warcholińska
Keyword(s):  
Present State ◽  
Weed Communities

This paper presents the results of research on changes in weed communities of stubble fields of the Piotrków Plain (see W a r c h o l i ń s k a, 1994 - Figure 1) which took place during the period between 1971 and 1972 and between 1992 and 1993. On the basis of 30 phytosociological records, taken in 24 localities (Figure 1) in the years of 1971 and 1972, 3 associations were distinguished (Tables I-III, see W a r c h o l i ń s k a, 1974): <i>Centunculo-Anthoceretum punctati, Hyperico-Spergularietum rubrae</i> and <i>Herniario-Polycnemetum</i>. According to the repeated listing carried out in the years of 1992 and 1993 the changes in the communities of the above-mentioned items were stated. The comparison of the present state of these communities with their state of 22 years ago allowed to note that the analyzed agrophytocoenoses of stubble fields got impoverished due to progressive anthropopressure (Tables I-IV, Figure 2).

scholarly journals Changes of segetal vegetation of the Piotrków Plain during the last 22 years. Part 1. Communities of weeds of winter cereal cultures

2013 ◽  
Vol 47 (1) ◽  
pp. 5-36
Author(s):  
A. Urszula Warcholińska
Keyword(s):  
Present State ◽  
The State ◽  
Winter Cereal ◽  
Weed Communities ◽  
Segetal Communities

This paper presents the results of research in segetal communities of winter cereal cultures of the Piotrków Plain (Figure 1) which took place during the period between 1971 and 1972 and between 1992 and 1993. On the basis of 205 phytosociological records, taken in 103 localities in the years of 1971 and 1972 (Figure 2), 6 associations were distinguished (Tables I-IX): <i>Spergulo-Veronicetum dillenii, Arnoserido-Scleranthetum, Papaveretum argemones, Vicietum tetraspemae, Aphano-Matricarietum, Caucalido-Scandicetum</i>. According to the repeated listing carried out in the years 1992 and 1993 the changes of the communities of the mentioned items were disclosed. The comparison of the present state of the weed communities of the winter cereal cultures on the researched area with the state of 22 years ago allowed to note that the changes in the analyzed agrophytocoenoses are caused by progressive anthropopressure.

scholarly journals Use of weed communities for estimation of field habitats for needs of agriculture

2013 ◽  
Vol 33 (1) ◽  
pp. 153-171
Author(s):  
Urszula A. Warcholińska
Keyword(s):  
Biological Activity ◽  
Nitrogen Content ◽  
Present State ◽  
Soil Ph ◽  
Soil Nitrogen ◽  
Field Region ◽  
Weed Communities ◽  
Agricultural Use ◽  
State Of Field

Closed connection was found between particular weed communities and the edaphic agricultural complexes of the investigated field region (see Tab. l ). Taking adventage of bioindicative properties of weed communities the numeric values were found depicting present state of field biotops of investigated region concerning termic relations, humidity relations, soil pH, soil nitrogen content and biological activity of the soil. These resultes were further used as an aid to evaluate particular field biotops to agricultural use.

scholarly journals Changes of weed communities of root crop cultures in the region of Sieradz and Zduńska Wola during the last 16 years

2013 ◽  
Vol 46 (2) ◽  
pp. 27-53
Author(s):  
A. Urszula Warcholińska
Keyword(s):  
Present State ◽  
Root Crop ◽  
Weed Communities

This article presents the results of research on segetal vegetation of root crop cultivations of the area around Sieradz and Zduńska Wola, carried out in the years 1977 and 1992 (Figure 1). On the basis of 120 phytosociological records, taken in 1977, 6 associations were distinguished (Tables 1-8): <i>Digitarietum ischaemi, Bilderdykio-Lamietum amplexicaule, Galinsogo-Setarietum, Echino-chloo-Setarietum, Veronico-Setarietum pumilae, Lamio-Veronicetum politae</i>. According to the repeated listing, conducted in 1992, changes of the above - mentioned associations were stated. The comparison between the present state of the associations of root crop weeds on the area researched and their state of 16 years ago showed their impoverishment (compare Tables 1-9, Figures 2-9).

The Present State of the Art

1984 ◽  
Vol 29 (4) ◽  
pp. 344-346
Author(s):  
Peter A. Magaro
Keyword(s):  
Present State ◽  
State Of The Art

Present state and innovative issues for ironmaking

2005 ◽  
Vol 102 (3) ◽  
pp. 161-169 ◽  
Author(s):  
J.-M. Steiler ◽  
F. Hanrot
Keyword(s):  
Present State

Competitive Capacity and Modernization of the Russian Economy

2004 ◽  
pp. 4-34 ◽  
Author(s):  
E. Yasin ◽  
A. Yakovlev
Keyword(s):  
Present State ◽  
Transition Economy ◽  
Adaptive Model ◽  
Russian Economy

Having analyzed the present state of the Russian economy the authors come to the conclusion that the only reasonable goal of its modernization is achieving high competitive capacity of production. External and internal competitive capacity is analysed in detail basing on broad statistics as well as competitive capacity of institutions and their changes, the adaptive model of transition economy. According to the authors implementation of competitive capacity policy as a national idea should take into account long-term perspective.

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