Cenozoic evolution of Asian climate and sources of Pacific seawater Pb and Nd derived from eolian dust of sediment core LL44‐GPC3

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/95692/1/palo954.pd

Symposium no. 59 Paper no. 749 Presentation: oral 749-1

Sorghum and castor-based systems are the major rainfed cropping systems of Southern Telangana region of A.P., India. The productivity of these systems is very low (around 0.5 t ha ) due to low and variable rainfall and nutrient poor soils. A collaborative research project involving FAO-IAEA, Vienna; ANGRAU, and ICRISAT, was started during 1999 at the RARS, Palem, Mahabubnagar district, A.P. The objective of this research is to develop a set of options for improving the `N' nutrition of these dryland cropping systems through evaluation of N source partitioning between BNF, N fertilizer, N recycling from residues/FYM and soil organic matter. The main experiment, rainfed, was conducted with traditional (sorghum-castor) and improved (sorghum/pigeonpea-castor) cropping systems on a two year rotation cycle in split plot design with 4 `N' management options (0N, 60 kg N ha as urea, 1.5 t FYM ha , and 45 kg N ha as urea + 1.5 t FYM ha ) on an Alfisol

Mon. Not. R. Astron. Soc. 000, 1{?? (2001) Printed 22 May 2002 (MN L A T E X style

Analyses of the abundances of neutron-capture elements have led to the belief that these elements in metal-poor stars are r-process products with relative abundances closely resembling those found in the solar system. This picture was challenged by Magain (1995), who found that a pure r-process mix of the barium isotopes was inconsistent with the mix of odd to even barium isotopes derived from analysis of the Ba ii line at 4554 A in the spectrum of the metal-poor subgiant HD 140283. In this paper, we address Magain's challenge using new high resolution high signal-to-noise spectra of HD 140283, and nd, in contrast to his result, that a solar-like r-process isotopic mixture provides a fair t to the observed 4554 A pro le