Wyniki wyszukiwania - AGRO

1

The vertical distribution of Collembola in an agricultural landscape

100%

Filser J., Fromm H.

Polskie Pismo Entomologiczne

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1995

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tom 64

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nr 1-4

2

Collembolan communities in winter wheat - clover cropping system on two different soil types

100%

Kovac L., Miklisova D.

Polskie Pismo Entomologiczne

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1995

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tom 64

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nr 1-4

3

Long-term changes in the flora of the "Krowie Bagno" against a background of changes in habitat conditions

86%

Buczek A., Urban D.

Teka Komisji Ochrony i Kształtowania Środowiska Przyrodniczego

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2004

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tom 01

4

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Content of selenium in arable soils near Wroclaw

86%

Patorczyk-Pytlik B., Kulczycki G.

Journal of Elementology

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2009

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tom 14

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nr 4

The material for this study consisted of 60 soil samples collected from the arable layer of cultivated fields located in the vicinity of Wrocław. The samples varied in their properties and reflected a whole range of soil types to be found in the region of Lower Silesia. The examinations proved that selenium content in arable soils near Wroclaw ranged from 81 to 449 μg⋅kg-1 and the average value of Se content in these soils was 202 μg⋅kg-1. The lowest Se content appeared in sandy soils (174 μg⋅kg-1), while the highest value was found in loamy soils. The mean value of Se content calculated for this group of soils was 228 μg⋅kg-1. Selenium content in soils varied to a high degree (V=42%). The value lower than 100 μg⋅kg-1, assumed as a critical one for the quality of plant yield, was recorded for 4 samples, while in 33 soil samples the Se content fell in the range of 101- -200 μg⋅kg-1 and in 14 samples it ranged from 201 to 300 μg⋅kg-1. Only 9 soils out of these subjected to investigation characterized selenium value higher than 300 μg⋅kg-1, i.e. the value regarded as medium soil fertility. Se content in soils was highly correlated with their content of silt and clay, as well as colloidal parts and also with the amount of C and total content of such chemical elements as P, S, Fe, Cu, Zn and Ni.

5

Degradation of ethofumesate in soil under laboratory conditions

86%

Kucharski M., Sadowski J.

Polish Journal of Environmental Studies

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2009

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tom 18

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nr 2

243-247

The aim of our research was to determine the influence of the soil type and adjuvants on the dynamics of ethofumesate degradation in soil. Samples of two types of soil were placed in growth chambers. Ethofumesate was applied at a rate of 800 g·ha⁻¹, alone and in mixture with adjuvant based on methylated crop oil and surfactant adjuvant. Residues of ethofumesate were determined using high-performance liquid chromatography with UV detection. The type of soil influenced the degradation rate of ethofumesate. Significant differences in degradation rate between soils during the first period after treatment (36 days) influenced the DT₅₀ indicator. The addition of oil adjuvant slowed down the degradation of ethofumesate and increased the level of residue in soils. The DT₅₀ value for mixture ethofumesate + oil adjuvant was about 8-10 days higher in comparison with the DT₅₀ for ethofumesate applied alone. No significant differences were observed between degradation rates and the DT₅₀ for ethofumesate applied alone and with surfactant adjuvant.

6

Usage of the graph clustering algorithm to the recognition of geotechnical layers

86%

Rabarijoely S., Bilski P., Falkowski T.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2007

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nr 38

57-67

The aim of the paper is to present the approach to the application of the graph clustering algorithm to the recognition of geotechnical layers from the dilatometer tests. Results of the measurements obtained from the DMT test in the test site (subsoil of one of the buildings in the Warsaw University of Life Sciences campus) were analyzed by the clustering algorithm which was able to extract the separate groups of the measurements, representing identical soil type. This method is parameterized, so its verifi cation by the geotechnical experts was necessary to determine the optimal parameter values. They lead to the determination of the soil types as close to the actual situation, as possible. Also, the output of the algorithm was analyzed by the geotechnical experts to identify and label the extracted soil types.

7

Nematodes colonizing power plant ash dumps. II. Nematode communities in ash dumps covered with turf - effect of reclamation period and soil type

86%

Dmowska E.

Polish Journal of Ecology

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2005

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tom 53

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nr 1

Changes in the below-ground system of ash dumps reclaimed by covering with turf were estimated using parameters and indices based on analysis of nematode communities. Higher trophic diversity, higher values of Maturity Index (MI), and higher complexity of foodweb structure were expected when reclamation proceeded. The study was carried out for three years in chronosequences of ash dumps. Two of the dumps were reclaimed shorter and were studied between the 2nd and 5th year of reclamation, the first one was reclaimed by covering with turf with mineral soil (S-M), the second one with turf with organogenic soil (S-O). The third ash dump reclaimed in longer time, covered with turf with organogenic soil was studied between the 8th–11th year of reclamation (L-O). Until the fourth year of reclamation S-O site provided better conditions for the development of nematodes than S-M site; trophic diversity and MI were higher in S-O site in comparison with S-M site. Later on most parameters and indices were similar in S-M and S-O site. Longer reclamation resulted in higher total abundance, higher abundance of bacterivores, plant feeders and omnivores, and also higher biomass of bacterivores and plant feeders. However, changes in the below-ground system of reclaimed ash dumps were very slow because even after 11 years of reclamation the ash dump had the features of a degraded environment.

8

Effect of the soil type on the molecular structure, properties and conditions of occurrence of humous acids

86%

Ksiezopolska A.

Acta Agrophysica

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2000

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tom 35

The study presented here concentrates on the characteristics of the humous compounds of humic and fulvic acid fractions of ß-humus, originating from the typologically differentiated soils (podzolic soil and chernozem). The soils were chosen so as to emphasize differences between chemical structure and degree of aromatic nucleus condensation in the humous acids isolated from them. It was found that the structure of the humous substances isolated from the podzolic soil is characterised by the lowest degree of condensation of the aromatic nucleus and the lowest polymerisation, while the humous acids from the chernozem are characterised by the highest degree of condensation of the aromatic nucleus and the strongest polymerisation.

9

Physical properties of soil aggregates from various horizons of four soils

86%

Turski M., Lipiec J., Nosalewicz A.

Polish Journal of Soil Science

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2000

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tom 33

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nr 1

10

The development of bacteria with different food requirements as affected by the pH and type of soil

86%

Weyman-Kaczmarkowa W., Pedziwilk Z.

Acta Microbiologica Polonica

|

1999

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tom 48

|

nr 3

11

Changes in soil quality due to tillage practices in rainfed hardsetting alfisols and irrigated vertisols of Eastern Australia

86%

Chan K. Y., Hulugalle N. R.

Bibliotheca Fragmenta Agronomica

|

1997

|

tom 2A

12

Particulate organic matter and microbial biomass C contents in soils with different mechanical structure

72%

Gajda A., Martyniuk S.

Pamiętnik Puławski

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2005

|

tom 140

13

Yield changeability of winter wheat cultivars in diversified environments and herbicide variants

72%

Kieloch R., Weber R., Doroszewski A., Purchala L.

Acta Scientiarum Polonorum. Agricultura

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2015

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tom 14

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nr 3

Yield size is the product of the genetic properties of the cultivar, environmental conditions, and the applied agrotechnics, including herbicide application. In agricultural practice, cultivars with high adaptation to changeable environmental conditions and tolerant in relation to many active substances of herbicides are preferred, as this ensures the obtainment of stable yield. The aim of the work was the evaluation of the effect of different herbicides on the yield changeability of winter wheat cultivars grown in diversified environmental conditions in Lower Silesia. In the years 2010-2013, field experiment was carried out on the yield changeability of four winter wheat cultivars (Boomer, Cubus, Nadobna, and Rapsodia) depending on the herbicide and environmental conditions. Studied environments were located in two towns in the vicinity of Wrocław, with diversified soil conditions (podsolic soil and chernozem). Three herbicides with different action mechanisms were applied: Panida 330 EC (pendimethalin), Snajper 600 SC (diflufenican + isoproturon), and Axial 100 EC (pinoxaden) with adjuvant Adigor 440 EC. Multivariate analysis of variance and discriminant analysis were used for the evaluation of the yield changeability of wheat cultivars in the particular environments. In order to group herbicides of similar effect, Ward’s method of cluster analysis was applied. Cultivar Rapsodia was characterized by significantly higher yield, whereas Nadobna gave lower yield, in particular on chernozem. The studied variants of plant protection against weeds did not diversify the yield size of winter wheat cultivars. Cultivar Cubus was characterized by higher yield stability in comparison with the other cultivars. Herbicide Panida 330 EC contributed to the higher yield changeability of the studied cultivars. The chemical may contribute to the reduction in grain yield of some winter wheat cultivars in unfavourable environmental conditions.

14

Ascorbate-glutathione cycle and other bioactives variability in two kale genotypes in relation to soil type and N-level

72%

Lata B.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 2

15

Effect of long storage and soil type on the actual denitrification and denitrification capacity to N2O formation

72%

Wlodarczyk T., Szarlip P., Koziel W., Nosalewicz M., Brzezinska M., Pazur M., Urbanek E.

International Agrophysics

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2014

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tom 28

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nr 3

The actual denitrification to N 2 O and denitri- fication capacity to N 2 O after flooding of different soil samples stored for over 25 years in air-dry conditions and fresh, air dried samples were compared in our study. Zero N 2 O release was ob- served from the stored soils but the fresh soil samples had very low actual denitrification to N 2 O. NO 3 - addition significantly increased the amount of N 2 O (denitrification capacity to N 2 O) released after flooding, which depended on the length of storage and type of soils and was much higher in stored soils. Prolonged exposure of the soils to drought conditions caused a greater decrease in the Eh value compared with the fresh soil. The total cumulative release of N 2 O from the stored and fresh soils was correlated with the reduced NO 3 - and organic C content in soils enriched with NO 3 - . Some soils showed the capability of N 2 O consumption. CO 2 release depended on the length of storage and type of soils under flooding after pro- longed drought. On average, CO 2 release was higher from the stored rather than fresh soils. The organic C content in the stored soils was generally lower than in the fresh soils, probably due to the storage effect. The cumulative CO 2 release from the stored soils was well correlated with the organic C while no correlation was observed for the fresh soil samples.

16

The influence of diesel fuel and biodiesel on soil microbial biomass

72%

Hawrot-Paw M., Martynus M.

Polish Journal of Environmental Studies

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2011

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tom 20

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nr 2

Our study aimed to determine the effects of conventional diesel fuel modification with biodiesel addition on the activity of soil microbiota. Diesel fuel, biodiesel and their mixture in a concentration of 5% (w/w) were introduced into soils – light loamy silty sand and light silty loam. Based on the obtained results, reduction in the content of live microbial biomass was found, irrespective of the soil type and contamination. Despite the introduction of biodiesel into soils, inhibition was observed in all examined treatments throughout the entire incubation.

17

Copper speciation in different-type soil profiles

72%

Wojcikowska-Kapusta A., Niemczuk B.

Journal of Elementology

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2009

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tom 14

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nr 4

Determination of the total content of metals in soils does not give enough information about their mobility and potential uptake by plants. The influence of heavy metals on plants depends on the type and form of a metal as well as properties of soil. The aim of the research was to evaluate the influence of soil type (Rendzic Leptosols, Haplic Luvisols, Haplic Arenosols) on the content and speciation of copper in soil profiles. The research was carried out in two physiographical regions: Lublin Upland and Sandomierska Valley. Samples were collected once from individual genetics horizons, in total from 30 typological differentiated soil profiles, made from chalk marl, loess and sands. Speciation analysis of copper was carried out with the use of a three-stage sequential method of fractionation, which can isolate four fractions with BCR: fraction I – forms soluble in water, exchangeable and bounded with calcium carbonate, extractable with CH3COOH; fraction II – forms bound with free Fe and Mn oxides, extractable with NH2OHHCl; fraction III – forms complexed with organic matter, hot extractable with 30% H2O2 and next the mineralization products reextractable with CH3COONH4; fraction IV – residual forms (residue), i.e. the difference between the total content and the sum of three fractions I – III. The speciation analysis indicated that in all the examined soil types, the residual form showed the largest share of copper in its total content, followed by forms bounded with organic matter and, containing the smallest proportion of copper, the soluble, exchangeable and bound with calcium carbonate forms. In rendzinas and lessive soils, the content of fraction IV in the humus horizons was significantly higher than in the parent rock, whereas in Haplic Arenosols the host rock was richer in this copper form than the humus horizons.

18

The evaluation of methods for detection of Bacillus anthracis spores in artificially contaminated soil samples

72%

Bielawska-Drozd A., Niemcewicz M., Bartoszcze M.

Polish Journal of Environmental Studies

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2008

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tom 17

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nr 1

5-10

The nested PCR has been used to evaluate the usefulness and efficiency of different Bacillus anthracis spore isolation methods in contaminated soil samples. The best results were obtained using two methods described by Beyer et al. [1] and Cheun et al. [9]. Outer and inner pairs of primers were designed from the protective antigen gene of plasmid pXO1 as well as from genes B and C of the capsule region of the plasmid pXO2. The influence of soil types on obtained results was also studied. The type of soil samples did not affect the nested PCR results. Furthermore, the sensitivity of nested PCR and PCR – ELISA was also examined.

19

Evaluation of correlation between parameters from CPTU and DMT tests and soil type behavior chart

72%

Rabarijoely S.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

|

2018

|

tom 50

|

nr 4

20

The development of Actinomycetes and fungistatic activity of soils as affected by pH and soil type

72%

Weyman-Kaczmarkowa W., Pedziwilk Z.

Acta Microbiologica Polonica

|

1999

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tom 48

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nr 1

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