Wyniki wyszukiwania - AGRO

1

Solar radiation variability over the Baltic Sea due to weather conditions

100%

Dera J., Rozwadowska A.

Oceanologia

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1991

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tom 30

2

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Testing the performance of a solar energy cooling system in Baghdad City

100%

Ahmed M. H., Al-Salihi A. M., Hussain H. H.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

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2021

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tom 30

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nr 2[92]

3

Nitrates [V] in loess soils modified by weather conditions [preliminary data of a model experiment]

100%

Glinski P., Stepniewska Z., Kotowska U., Borkowska A.

International Agrophysics

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2007

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tom 21

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nr 1

4

The influence of several agrotechnical factors on winter wheat yields

100%

Jonczyk K.

Fragmenta Agronomica

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1995

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tom 12

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nr 2

5

The effect of some winter weather indicators on overwintering of cereals

100%

Szymczyk R.

Fragmenta Agronomica

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1995

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tom 12

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nr 2

6

Employing empirical mode decomposition to determine solar radiation intensity curve

86%

Kapica J., Scibisz M.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2013

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tom 13

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nr 1

7

Weather conditions during the blossoming period and their effect on the yield of three cultivars of blackcurrant (Ribes nigrum L.)

86%

Grabowski J., Kawecki Z., Bieniek A., Tomaszewska Z.

Folia Horticulturae

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2009

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tom 21

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nr 2

35-42

8

Detectability of elusive reptiles under artificial cover objects is species- and year-specific

86%

Kolanek A., Bury S.

Polish Journal of Ecology

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2020

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tom 68

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nr 4

9

Health condition and structure of pine stands on permanent experimental plots in the Kwidzyn Forest Division

86%

Beker C., Wudarczyk M.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2007

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tom 06

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nr 4

The study presents the health condition and structure of pine stands growing on permanent experimental plots in the Kwidzyn Forest Division, the Ryjewo working circle, the Lisewo Forest District. Forest mensuration analyses were performed in a 127-year old pine stand (compartment 214), in five plots of 0.26 ha each. The health condition of the stand was determined on the basis of the losses of the assimilatory organs, i.e. defoliation. Mean defoliation of tree crowns was 20.3% (below the warning level), which corresponds to the damage rate of 1.14. A vast majority, i.e. 67% of the 176 analysed trees, represented damage rate 1 (Table 2). Taking into consideration the age of the stand (127 years) and its provenance (it was planted on former farmland) the health condition may be considered good. The structure of social classes of tree position in the stand shows an appropriate share of the upper storey (81.2-95.1%) and the second storey (4.9-18.8%). When analysing the basic characteristics of the stand structure it was found that the biggest variation was observed in crown length (from 17% to 30%), while the smallest – in height (from 6% to 9%). The mean relative crown length in the stands ranged from 0.21 to 0.24. Tree slenderness, defining resistance of trees to damage caused by wind and snow took mean values below 1.0 (from 0.71 to 0.83). This shows good stability of the analysed stands. Those stands are characterized by high yields of 465-614 m3 large timber per 1 ha and stocking of 1.0 to 1.3. As a result of the analyses of the interdependencies between the basic mensuration characteristics the most significant relationship was found for diameter at breast height and slenderness (from –0.718 to –0.913), height and absolute crown length (0.619-0.715) and diameter at breast height and height (0.161-0.708; Table 4). The trends in the annual increment in diameter at breast height showed the biggest decreases in the years 1977-1983, 1969-1974, 1962-1967, 1956-1960 and 1949-1952 (Fig. 6). Those periods coincide with gradations of nun moths and adverse weather conditions.

10

Study on the effects of changes of ambient temperature and solar irradiance on the efficiency of the silicon PV modules

86%

Sarniak M.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2016

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tom 16

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nr 1

11

Grass pollen seasons in Poland against a background of the meteorological conditions

86%

Myszkowska D., Piotrowicz K., Ziemianin M., Chlopek K., Dabrowska-Zapart K., Kasprzyk I., Grewling L., Majkowska-Wojciechowska B., Malkiewicz M., Nowak M., Piotrowska-Weryszko K., Puc M., Weryszko-Chmielewska E.

Acta Agrobotanica

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2015

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tom 68

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nr 4

The paper refers to the estimation of Poaceae pollen seasons in Poland in selected areas. The aim of the study was to present the long-term variability of the start, end and duration of grass pollen seasons and the seasonal pollen index (SPI) in Poland against a background of the meteorological conditions over pollen seasons. The study was performed in eight Polish cities in 1992–2014 (the common seasons were 2003–2012). Pollen season start was relatively stable in the studied period, the seasons began about the 10th of May, a bit earlier in the south part of Poland. Pollen season ends were more changeable in comparison to the season start and fluctuated from the middle of July to the middle of September. SPI clearly depended on temperature and precipitation in April–August. Daily maximum pollen concentrations were achieved between the end of May and the first decade of July and no evident relationship between this day and weather conditions was found, apart from 2004.

12

Forest ecosystem as a source of CO2 during growing season: relation to weather conditions

86%

Taufarova K., Havrankova K., Dvorska A., Pavelka M., Urbaniak M., Janous D.

International Agrophysics

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2014

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tom 28

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nr 2

Net ecosystem production reflects the potential of the ecosystem to sequestrate atmospheric CO2. Daily net ecosystem production of a mountain Norway spruce forest of the temperate zone (Czech Republic) was determined using the eddy covariance method. Growing season days when the ecosystem was a CO2 source were examined with respect to current weather conditions. During the 2005, 2006, and 2007 growing seasons, there were 44, 65, and 39 days, respectively, when the forest was a net CO2 source. The current weather conditions associated with CO2 release during the growing seasons were: cool and overcast conditions at the beginning or end of the growing seasons characterized by a 3-year mean net ecosystem production of -7.2 kg C ha-1 day-1; overcast or/and rainy days (-23.1 kg C ha-1 day-1); partly cloudy and hot days (-11.8 kg C ha-1 day-1); and overcast and hot days (-13.5 kg C ha-1 day-1). CO2 release was the highest during the overcast or/and rainy conditions (84%, average from all years), which had the greatest impact during the major production periods. As forests are important CO2 sinks and more frequent weather extremes are expected due to climate change, it is important to predict future forest carbon balances to study the influence of heightened variability in climatic variables.

13

The behaviour of calves in innovative rooms of open housing

86%

Kaczor A., Kaczor U., Mandecki A.

Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica

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2016

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tom 34

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nr 4

14

The effect of age and some environmental agents on physiological parameters of Polish Konik horses during the harrowing

86%

Pluta M., Kolstrung R., Slomiany J.

Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica

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2013

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tom 31

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nr 3

15

Prediction of yellow lupin yield (Lupinus luteus L.) for northern Poland using weather-crop model

86%

Grabowska K., Kuchar L., Dymerska A.

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

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2014

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tom 46

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nr 3

The paper presents an analysis of the impact of meteorological factors (solar radiation, maximum, minimum and mean temperature, precipitation) on the development and yield of yellow lupin Parys cultivar in the northern Poland in the years 1987–2008. Using multiple regression methods (linear and quadratic function) created regression equations that were estimated using the coeffi cients of determination (R2, R2 adj and R2 pred – using the Cross Validation procedure). Selected regression equation used to estimate the yield of yellow lupin, using generated – by means of model WGENK – daily values of global radiation, maximum and minimum temperature, precipitation, and climate change scenario GISS Model E for Central Europe. Examined dependencies weather-yield of lupine seeds (cultivar Parys) allowed the application of the chosen model to forecast yields from the time when the values are independent variables in the model by the end of the growing season. The comparison of distributions of actual and simulated yields shows that real yields are slightly (by 0.06 t·ha–1) higher than those generated for 2 × CO2 conditions.

16

The influence of weather conditions on selectivity of sulfonylourea herbicides to the selected maize varieties

86%

Golebiowska H., Rola H.

Journal of Plant Protection Research

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2003

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tom 43

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nr 3

17

Terms of winter wheat [Triticum aestivum] sowing and their influence on yields

86%

Grgic D., Kovacevic V.

Fragmenta Agronomica

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1995

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tom 12

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nr 2

18

Dormancy of onion as influenced by weather conditions during the growth season and maturity degree at harvest

86%

Grzegorzewska M.

Vegetable Crops Research Bulletin

|

1999

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tom 50

19

Operational aspects of safety from the stability point of view

86%

Kobylinski L.

Polish Maritime Research

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1999

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tom 06

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nr 3

20

Influence of weather conditions on populations of parasitic Hymenoptera in a beech forest on limestone

86%

Ulrich W.

Polskie Pismo Entomologiczne

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2000

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tom 69

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nr 1

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