Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 8

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  peat formation
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Age of mires and lakes in the light of radiocarbon dating

100%
Zurek S.
Quaestiones Geographicae
|
2000
|
tom 21
2
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Influence of the state of peat mass secondary transformation and date of sowing on darnel [Lolium perenne L.] emergencies

84%
Gawlik J., Harkot W.
Acta Agrophysica
|
2001
|
tom 52
Influence of the sowing date and state of secondary transformations of moorsh formations on the Lolium perewne seed germination in the condtions of pot xperiments was studied. Peaty moorshes (Zi) and proper moorshes (Z2) with granular structure'taken TrönTTFe peat-moorsh soils at various stages of the moorshing process were used in the present experiment. Two levels of soil moisture were applied. It was found out that the influence of the sowing date on the differentiation of darnel emergencies on the moorsh soils was not big. However, a clear tendency for better germination of the seeds sown in summer than those sown in spring was observed. It was especially visible on the granular moorsh formations (Z3) that were not able to create as favourable water conditions for darnel seed germination and development of seedlings as peat moorshes (Zi) because of poor abilities for water conductivity. The present experiment showed that in order to ensure darnel emergencies on the soils formed of granular moorshes it is necessary to keep their moisture level close to 80% of their full water capacity. Seed germination was influenced more by the kind of moorsh and its moisture level than by the status of secondary transformation of the moorsh mass and sowing date.
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Division of differently silted peat formations into classes according to their state of secondary transformations

84%
Gawlik J.
Acta Agrophysica
|
2000
|
tom 26
Three groups of moorsh formations distinguished on the basis of their ash content were divided into classes according to the state of progress of their secondary transformations. The basis for the division were numerical values of their water-holding capacity index W1. It was found that with the increase of ash content, the threshold value of the W1 index that distinguishes peats without any signs of secondary transformations from the peat formations secondary transformed, i.e., moorshes, also increases. In the moorshes with the lowest ash content (<25%) and weakly silted moorshes (26-50%), the threshold value of the W1 index is 0.35, whereas in the strongly silted moorshes with the mineral part content from 51 to 80%, it is 0.40. Five classes were defined in each of the group of moorshes - the first of them includes moorshes at the initial stage of secondary transformations, and the fifth one totally degraded formations.
4

A genetic classification of the palsa-like mounds in Western Canada

84%
Harris S. A.
Biuletyn Peryglacjalny
|
1998
|
tom 37
5
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Changes in the hydro-geochemical functions of the peat soils of the Polisya under drainage and agricultural usage

84%
Medvedyev V. V., Truskavetsky R. S., Zinchuk P. Y.
Acta Agrophysica
|
2002
|
tom 68
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Influence of the kind of moorsh and the state of its transformation on the germination and growth of Lolium perenne in the pot plant experiment during spring-summer cycle

67%
Gawlik J., Harkot W.
Acta Agrophysica
|
2000
|
tom 26
The influence of the kind of moorsh and the state of its transformation, as expressed in numerical values of the water absorption index W1, on the germination conditions of Lolium perenne seeds and further growth of young plants have been studied. It was found out that the main factor differentiating these conditions was grain structure of the moorsh mass that determined water conductive properties of the studies soils. The highestnumber of germinated seeds (40-85%) and the best plant growth was observed on peaty moorshes (Z1) of fine fibrous character with fresh humus admixture. Considerably worse conditions for darnel germination and growth (25-50% of germinated seeds) were found on proper fine-grained moorsh (Z3). It was confirmed by a relatively low dty mass yield of plants collected on these soils after completion of the experiment. The highest differentiation of seedlings, and at the same time the poorest germination were found on the proper degraded moorsh with crumble-grained structure with poor conductivity, and on peaty fibrous moorsh that formed a macro-porous layer on the soil surface in the conditions of intensive insolation and high air temperatures. This macro-porous layer efficiently limited capillary rise and evaporation. It was observed that the stale of transformation of moorsh formations expressed with numerical values of the W1 index did not exert any visible influence on the conditions of plant vegetation. The above observation proved that the W1 index is only vaguely connected with the soil conductive properties.
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Regularities of peat soils anthropic evolution

67%
Bambalov N.
Acta Agrophysica
|
2000
|
tom 26
Regularities in the transformation of peat structure, organic matter and nitrogen-bearing compounds composition were shown and prognosis of the consequences of the meliorated peat evolution by 2020 are made.
8
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Organic substance and classification of the meliorated soils forming as a results of peat layer destruction

67%
Bambalov N.
Acta Agrophysica
|
2000
|
tom 26
Scientific data on the evolution of meliorated peat soils under the impact of agricultural use are presented. The following 3 soil groups are formed as a result of destruction of a peat layer after drainage of mires:peat soils containing more than 30% of organic matter, organic-mineral and mineral residual-peatysoils containing15-30% and less than 15% of organic matter,respectively.The classification of each of this group based on the criteria of the morphology of soil profile, ratio between organic and mineral parts of the soil and granulometric composition of mineral bedrock is given. Suggestions about nomenclature of new soils are presented.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.