Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "area structure" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Zboża jako składnik rolnictwa i gospodarki Polski
Cereals as a component of agriculture and Polish economy
Autorzy:
Kapusta, Franciszek
Powiązania:
https://bibliotekanauki.pl/articles/569868.pdf
Data publikacji:
2016
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
cereals
area
production
structure
balance
self-sufficiency
Opis:
The aim of this study was to: a) show the place and role of cereals in the Polish economy in the early twenty-first century; b) analyze changes in the area of cereal crops and their share in the structure of crops in the years 1938-2013; c) analyze trends in the size and structure of grain production in the years 1938-2013; d) perform balance of cereals and determination of Polish self-sufficiency in this product; e) characterize trends in destiny cereals; f) present state intervention in the grain market. The analysis is based on sources such as scientific publications, reports of the Institute of Agricultural and Food Economics − National Research and statistical materials. The collected material was developed and interpreted using the methods: a comparison in the horizontal and vertical form, statistical form and determine the Polish self-sufficiency in grain production in terms of technical and economical Kapusta method. Cereals are an important component of agriculture and Polish economy since they are grown by 89.5% of farms, occupy almost three quarters of crop area and are an essential component of crop rotation (2013). 19.1% of global agriculture production and 35.5% of plant production and 13.1% of the agricultural commodity production and 29.1% of crop production form an important source of nutrients, the basis of the food pyramid and a basic component of food security, cereals and their derivatives are the subject of foreign trade and a source of increasing surplus in the trade balance (2012/2013 + 1 150 thousand euros). Already in pre- WWII Poland the position of grain was high, and in post-war Poland variable with a tendency to increase their role in plantings and agricultural production. Under the influence of various factors, mainly economic and natural there are changes to the total cereal cultivation area and the individual species. The universality of cereal crops makes difficulties in disseminating biological and technological progress. Although in the post-war period there was a decrease in areas planted with cereals, their collections are on the rise; also changes its structure in favor of more intensive species at a higher value in use (wheat, barley, triticale, corn). The production is realized in order to satisfy human needs, and therefore a good measure of the production of goods per 1 inhabitant, in this case the grain. From the pre-war years to modern years grain production has increased from 404 kg per capita to 739 kg. In the balance sheet of cereals at the beginning of the twenty-first century, we have two different situations; relatively stable internal consumption is accompanied by high volatility on the production side (changes in acreage and yields), which generates the need for imports in the years of crop failure. In Poland, cereals consumed (average of the years 2000 / 01-2012 / 13, for 13 years) are as follows: grazing − 60.5%, consumption − 22.2%, sowing (reproduction) − 7.2%, industrial processing − 4.5%, other (loss defects) − 3.7%. At the same time Poland exported 15,676 thousand tons of grain, and imported 16, 530 thousand tones, i.e. 854 thousand tons more. In subsequent years, however, there were changing trends in the balance of foreign trade in grain. In the period of Polish membership in the European Union we observe the increased foreign sales of grain and milk (both exports and imports). As a result of well-developed grain processing and export of its products Poland has achieved positive balance of trade with increasing surplus with foreign countries in terms of value for several years. The cereals market in Poland − as in other European Union countries − is regulated, and this action is led the Agricultural Market Agency on behalf of the state.
Źródło:
Ekonomia XXI Wieku; 2016, 2 (10); 121-137
2353-8929
Pojawia się w:
Ekonomia XXI Wieku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics, structure and chemistry of litterfall in headwater riparian forest in the area of Middle Pomerania
Autorzy:
Jonczak, J.
Olejniczak, M.
Parzych, A.
Sobisz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/15438.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
litter fall
dynamics
structure
chemistry
nutrient
heavy metal
headwater area
riparian forest
Pomeranian region
Opis:
The following research on plant litterfall mass, dynamics, structure and chemistry was conducted from 2012 to 2014, on a 40- to 86-year-old stand of black alder (Alnus glutinosa) growing in a headwater area of the upper part of the valley of the Kamienna Creek (Middle Pomerania). Litterfall was collected every month with 20 circular traps, dried untill constant weight, divided into fractions, weighed and analyzed. The annual amount of litterfall deposited on soil during the study period ranged from 3482.5 to 4106.9 kg·ha-1, showing a dynamics pattern typical of temperate decidous forests. Leaves constituted the major fraction of litter with share of between 78.0 and 81.6% in its total mass. The contribution (in %) of twigs was 4.9-5.6, flowers 2.8-8.3, fruits 0.2-0.9 and other components 7.6-9.2. The relatively stable environmental conditions of headwater areas and the absence of disrupting factors during the study period were reflected in the low temporal variability of litterfall mass, dynamics and chemical composition of its individual fractions. The average annual pH of litterfall was 4.33-4.57. In general, litter was relatively rich in nitrogen and calcium but poor in phosphorus, potassium and magnesium. The content of Fe, Al and Mn was characteristic for these elements and low when compared to the other macroelements. The low contents of Cu and Zn confirm limited anthropogenic contamination of the investigated ecosystem with these metals. The annual return of the elements to the soil formed a series C>N>Ca>K>Mg>P>Mn>Fe>Al>Zn>Sr>Cu. A relatively large influx to the soil was noticed for nitrogen and calcium. Meanwhile, it was low for potassium, magnesium and phosphorus.
Źródło:
Journal of Elementology; 2016, 21, 2
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polscy optanci z Zagłębia Ruhry w 1924 roku. Aspekty demograficzne
Autorzy:
Chojecki, Dariusz K.
Powiązania:
https://bibliotekanauki.pl/articles/2036320.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Historii im. Tadeusza Manteuffla PAN w Warszawie
Tematy:
emigration
option
choice of Polish citizenship
Ruhr area
Polish consulate in Essen
interwar period
historical demography
structure
wychodźstwo
opcja
wybór obywatelstwa polskiego
Zagłębie Ruhry
polski konsulat w Essen
okres międzywojenny
demografia historyczna
struktura
Opis:
Odbudowie państwa polskiego po I wojnie światowej towarzyszyło wiele przypadków powrotu do kraju. Jeden ze strumieni remigracyjnych tworzyli polscy optanci z Niemiec, którzy na mocy traktatu wersalskiego postanowili przyjąć obywatelstwo polskie. Głównym miejscem wychodźstwa stał się obszar Zagłębia Ruhry. Celem niniejszego artykułu jest przedstawienie struktury demograficznej osób tworzących ową falę migracyjną w jej późnej fazie (1925). Do analizy wykorzystano imienne wykazy optantów, które posłużyły do przeprowadzenia grupowania statystycznego i ukazania przestrzennego rozkładu interesującego nas zjawiska. Badania dotyczyły zbiorowości 1727 osób ujętych w źródle. Oprócz metody agregatywnej i kartograficznej wykorzystano metodę porównawczą, dysponując niezbędnymi danymi dla innych obszarów państwa Prusy. Badania ukazały specyfikę polskich optantów w Zagłębiu Ruhry w odniesieniu do ich rozlokowania przestrzennego, zawodów, feminizacji, typu migrowania, form gospodarstw domowych, dzietności czy antroponimów.
The rebuilding of the Polish state after World War I was accompanied by a quantitively significant number of returns to the country. One of the re-emigration streams was created by an influx of Polish optants from Germany, i.e. ethnic Poles who had decided to take up Polish citizenship under the Versailles Treaty. The principal area of emigration was the Ruhr region. The purpose of this paper is to examine the demographic structure of the people who made up this migration stream in its late phase (1925). The analysis is based on lists of optants which were drawn up for the purpose of statistical grouping and showing the optants’ spatial distribution. The research concerns a population of 1,727 people included in the source. In addition to aggregate and cartographic methods, the paper also uses the comparative method based on the available data for other areas in the state of Prussia. The research helps describe the population of Polish optants in the Ruhr area in terms of their spatial distribution, professions, feminisation, type of migration, household forms, fertility, and anthroponyms.
Źródło:
Roczniki Dziejów Społecznych i Gospodarczych; 2021, 82; 111-147
0080-3634
Pojawia się w:
Roczniki Dziejów Społecznych i Gospodarczych
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies