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Wyświetlanie 1-10 z 387
Tytuł:
Effect of tillage practices and farmyard manure on rice Oryza sativa L. and water storage capacity of upland inceptisols of Bastar Plateau in India
Autorzy:
Pandey, T.D.
Thakur, D.S.
Powiązania:
https://bibliotekanauki.pl/articles/8882060.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
tillage practice
farmyard manure
rice
Oryza sativa
water storage
upland inceptisol
Bastar plateau
India
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2003, 58; 185-191
0365-1118
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Late Cretaceous mammals from the Intertrappean beds of Rangapur, India and paleobiogeographic framework
Autorzy:
Rana, R S
Wilson, G.P.
Powiązania:
https://bibliotekanauki.pl/articles/21414.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Eutheria
mammal
Gondwana
Cretaceous
Late Cretaceous
tooth
Intertrappean bed
biogeography
India
Rangapur
paleobiogeography
paleontology
Opis:
A new mammal−bearing locality from the Intertrappean beds (Maastricthian) of Rangapur, Andhra Pradesh, India provides isolated teeth referable to Deccanolestes and a new eutherian, Sahnitherium rangapurensis. Dental comparisons with Cimolestes, Procerberus, and Aboletylestes do not support proposed “palaeoryctoid” affinities for Deccanolestes. Although similarities exist with Otlestes and Batodon, Deccanolestes is currently considered to be of uncertain familial affinities. Sahnitherium rangapurensis exhibits similarities to Procerberus, Paranyctoides, Alostera, Aboletylestes, and Avitotherium, but it is here placed within Eutheria incertae sedis. Despite family level taxonomic uncertainties, the new material confirms the presence of eutherians on the Indian subcontinent during the Late Cretaceous. A Eurasian connection via an early collision or some other dispersal route may explain these paleobiogeographic data, but other hypotheses are considered. In particular, paleogeographic, paleontological, and molecular systematic data hint that boreosphenidan mammals may have had wider distribution on Gondwana during the Cretaceous than previously supported.
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light minerals of beach sediments from Southern Tamilnadu, South East coast of India
Autorzy:
Cherian, A.
Chandrasekar, N.
Rajamanickam, V.
Powiązania:
https://bibliotekanauki.pl/articles/47531.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
sphericity
Tamilnadu
beach
provenance
India
light mineral
quartz
sediment
coast
roundness
Opis:
A brief investigation of light minerals along the beaches between Valinokkam and Tuticorin has been carried out for the first time along the Southern Tamilnadu coast in order to discover the provenance of the sediments. The study spotlights a wide variation in light mineralogy along the three zones of the investigated area (Valinokkam, Vaippar and Tuticorin). A higher percentage of quartz is reported from the Valinokkam (48.34 to 68.63%) and Tuticorin zones (55.66 to 73.05%) than from the Vaippar zone (40.24 to 60.77%). The trend with regard to the maturity index is similar, with appreciably higher values in Valinokkam (1.15 to 1.89) and Tuticorin (1.61 to 1.94) than Vaippar (0.79 to 1.39). Morphological analysis of quartz grains shows a higher order of sphericity and roundness values in Valinokkam and Tuticorin as compared to Vaippar. Moreover, the surface texture of quartz grains observed with the aid of scanning electron microscope (SEM) photographs reveals the presence of different depositional environments and the multiple origin of beach sediments in the study area. From the present study of the light mineralogy of beach sediments, it is inferred that the source of the sediments is a mixed type: igneous and metamorphic crystalline rocks, together with palaeosediments.
Źródło:
Oceanologia; 2004, 46, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mikromorfologiczne cechy pokryw glebowych obszaru o najwyższych opadach na świecie - Cherrapunji, Wyżyna Meghalaya, Indie
Micromorphological features of the soil covers in the area of the highest rainfall in the world -Cherrapunji, Meghalaya Hills, India
Autorzy:
Budek, A.
Prokop, P.
Powiązania:
https://bibliotekanauki.pl/articles/2074407.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
analiza mikromorfologiczna
pokrywa glebowa
proces wietrzenia
micromorphology
soil cover
weathering
India
Opis:
The paper presents the results of micromorphological analyses concerning soil covers near Cherrapunji with mean annual rainfall of 12 000 mm. Two soil profiles representing typical land use: grass formation (Cherrapunji–1) and natural evergreen forest (Cherrrapunji–2) have been choosen. Processes leading to formation of Dystric Cambisols predominate in both profiles. However they have different weathering features. Soil cover under grass has more weathered quartz and contains less feldspars compared to soil cover in the forest area. Soils are characterized also by a large volume of pores which is typical for the tropical humid areas. The rapid infiltration of large amounts of water protects forest soil from surficial erosion. In case of soils under grass vegetation, micropores are filled with fresh organic matter (fine roots and plants tissue). Since both profiles are located on similar substratum (Paleogene sandstones) and under the same climatic conditions, it is assumed that the micromorphological differences are due to long-term (several centuries) differences in local land use.
Źródło:
Przegląd Geologiczny; 2005, 53, 4; 293--298
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Depositional environment of sediments along the Southern coast of Tamil Nadu, India
Autorzy:
Angusamy, N.
Rajamanickam, G.V.
Powiązania:
https://bibliotekanauki.pl/articles/48988.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
depositional environment
Tamil Nadu coast
beach sediment
wave dynamics
grain size
sediment
India fluvial input
littoral transport
Opis:
Grain size studies of sediments from beaches in the region from Mandapam to Kanyakumari, divided into 5 sectors, indicate that sediments are unimodal to polymodal in nature, coarse to fine grained, moderately to poorly sorted, and positively-negatively skewed in character. The inference to be drawn from these studies is that the variation in sedimentological parameters is governed by fluvial input, wave dynamics, and littoral transport of the sediments. Bivariant plots show that the Mandapam and Kanyakumari sectors can be classified as beach environments, whereas the Tuticorin and Valinokkam sectors come under the influence of riverine environments and the dune environment in the Manappad sector. The CM pattern of all five sectors shows a clustered distribution of sediments in the PQ and QR segments, indicating a graded mode of deposition. Visher diagrams depict a wave shadow environment for the Mandapam sector, whereas the Valinokkam, Tuticorin and Manappad sectors show double saltation populations characteristic of beaches, and the Kanyakumari sector is characterized by a more truncated population characteristic of a plunge zone, which is a high-energy environment.
Źródło:
Oceanologia; 2006, 48, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Appraisal of tsunami inundation and run-up along the coast of Kanyakumari District, India - GIS analysis
Autorzy:
Chandrasekar, N.
Immanuel, J.L.
Sahayam, J.D.
Rajamanickam, M.
Saravanan, S.
Powiązania:
https://bibliotekanauki.pl/articles/47753.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
tsunami hazard
Kanyakumari District
tsunami
geospatial technology
India
inundation
coast
evaluation
Opis:
On 26D ecember 2004, a tsunami severely affected almost all the coastal villages of Kanyakumari District, India. It was one of the worst affected coastal sectors of South India. An attempt has been made here to assess the impact of the tsunami hazard on coastal landforms and the level of inundation using GIS techniques. The areas of inundation were surveyed and mapped by fixing regular transects along the coastal regions. The percentage of inundated area in the total area was estimated. It was found that inundation was higher on low-lying coasts and relatively less on elevated coasts. In some cases, the extent of inundation was a few kilometres in relation to other coasts, but the percentage of inundated area in the total coastal area was high. The extent of inundation along the study area varied from 50 m to 450 m. Inundation was minimal in coastal villages like Kanyakumari, Agastheeswaram, Madhysoodhanapuram and Dharmapuram, but extensive at Colachel. The percentage of inundated area in the total area ranges from 8% (Dharmapuram) to 39% (Colachel). The degree of inundation was controlled by coastal geomorphological features such as sand dunes, cliffs, coastal vegetation, nature and configuration of the beach, not to mention the angle and velocity of the invading tsunami surge.
Źródło:
Oceanologia; 2007, 49, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coastal processes of Central Tamil Nadu, India: clues from grain size studies
Autorzy:
Angusamy, N.
Rajamanickam, G.V.
Powiązania:
https://bibliotekanauki.pl/articles/48429.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
depositional environment
Tamil Nadu
beach
grain size
India
sediment
coastal process
Opis:
The sediments of the beaches along the central coast of Tamil Nadu from Pondicherry to Vedaranyam were studied for their textural variation. 108 sediment samples collected from the low-, mid-, and high-tidal zones, as well as the berms and dunes of different beach morpho-units were analysed. The study area was divided into three sectors (northern, central and southern) on the basis of prevailing energy conditions and oceanographic parameters. The poorly sorted, negatively skewed, coarser sediments of the northern sector are indicative of denudational processes taking place there. Medium-to-fine, moderately-to-well sorted, positivesymmetrically skewed sediments dominate the central sector, probably as a result of the influence of palaeo-sediments deposited by rivers from inland as well as by waves and currents from offshore. Fine, poorly sorted, positive-symmetrically skewed sediments dominate the southern sector, highlighting depositional processes. Linear Discriminant Function Analysis (LDF) of the samples indicates a shallow marine environment origin for all the three sectors. These results show that reworked sediments, submerged during the Holocene marine transgression, are being deposited on present-day beaches by waves, currents and rivers in the study area.
Źródło:
Oceanologia; 2007, 49, 1
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 387

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