<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Quesada, C. A.</style></author><author><style face="normal" font="default" size="100%">Lloyd, J.</style></author><author><style face="normal" font="default" size="100%">Schwarz, M.</style></author><author><style face="normal" font="default" size="100%">Patino, S.</style></author><author><style face="normal" font="default" size="100%">Baker, T. R.</style></author><author><style face="normal" font="default" size="100%">Czimczik, C.</style></author><author><style face="normal" font="default" size="100%">Fyllas, N. M.</style></author><author><style face="normal" font="default" size="100%">Martinelli, L.</style></author><author><style face="normal" font="default" size="100%">Nardoto, G. B.</style></author><author><style face="normal" font="default" size="100%">Schmerler, J.</style></author><author><style face="normal" font="default" size="100%">Santos, A. J. B.</style></author><author><style face="normal" font="default" size="100%">Hodnett, M. G.</style></author><author><style face="normal" font="default" size="100%">Herrera, R.</style></author><author><style face="normal" font="default" size="100%">Luizao, F. J.</style></author><author><style face="normal" font="default" size="100%">Arneth, A.</style></author><author><style face="normal" font="default" size="100%">Lloyd, G.</style></author><author><style face="normal" font="default" size="100%">Dezzeo, N.</style></author><author><style face="normal" font="default" size="100%">Hilke, I.</style></author><author><style face="normal" font="default" size="100%">Kuhlmann, I.</style></author><author><style face="normal" font="default" size="100%">Raessler, M.</style></author><author><style face="normal" font="default" size="100%">Brand, W. A.</style></author><author><style face="normal" font="default" size="100%">Geilmann, H.</style></author><author><style face="normal" font="default" size="100%">Moraes, J. O.</style></author><author><style face="normal" font="default" size="100%">Carvalho, F. P.</style></author><author><style face="normal" font="default" size="100%">Araujo, R. N.</style></author><author><style face="normal" font="default" size="100%">Chaves, J. E.</style></author><author><style face="normal" font="default" size="100%">Cruz, O. F.</style></author><author><style face="normal" font="default" size="100%">Pimentel, T. P.</style></author><author><style face="normal" font="default" size="100%">Paiva, R.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Variations in chemical and physical properties of Amazon forest soils in relation to their genesis</style></title><secondary-title><style face="normal" font="default" size="100%">Biogeosciences</style></secondary-title><alt-title><style face="normal" font="default" size="100%">Biogeosciences</style></alt-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">240</style></keyword><keyword><style  face="normal" font="default" size="100%">Content Type: Biblio</style></keyword><keyword><style  face="normal" font="default" size="100%">Czimczik Research Group</style></keyword><keyword><style  face="normal" font="default" size="100%">decomposition</style></keyword><keyword><style  face="normal" font="default" size="100%">dynamics</style></keyword><keyword><style  face="normal" font="default" size="100%">ecosystems</style></keyword><keyword><style  face="normal" font="default" size="100%">hedley fractionation</style></keyword><keyword><style  face="normal" font="default" size="100%">litter</style></keyword><keyword><style  face="normal" font="default" size="100%">nitrogen</style></keyword><keyword><style  face="normal" font="default" size="100%">organic phosphorus</style></keyword><keyword><style  face="normal" font="default" size="100%">phosphate</style></keyword><keyword><style  face="normal" font="default" size="100%">plant-available phosphorus</style></keyword><keyword><style  face="normal" font="default" size="100%">rhizosphere</style></keyword><keyword><style  face="normal" font="default" size="100%">rock</style></keyword><keyword><style  face="normal" font="default" size="100%">tropical rain-forests</style></keyword><keyword><style  face="normal" font="default" size="100%">Trumbore / Czimczik Research Group</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2010</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">&lt;Go to ISI&gt;://000278184500011</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">5</style></number><volume><style face="normal" font="default" size="100%">7</style></volume><pages><style face="normal" font="default" size="100%">1515-1541</style></pages><isbn><style face="normal" font="default" size="100%">1726-4170</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">Soil samples were collected in six South American countries in a total of 71 different 1 ha forest plots across the Amazon Basin as part of the RAINFOR project. They were analysed for total and exchangeable cations, C, N, pH with various P fractions also determined. Physical properties were also examined and an index of soil physical quality proposed. A diverse range of soils was found. For the western areas near the Andean cordillera and the southern and northern fringes, soils tend to be distributed among the lower pedogenetic levels, while the central and eastern areas of Amazonia have more intensely weathered soils. This gives rise to a large variation of soil chemical and physical properties across the Basin, with soil properties varying predictably along a gradient of pedogenic development. Nutrient pools generally increased slightly in concentration from the youngest to the intermediate aged soils after which a gradual decline was observed with the lowest values found in the most weathered soils. Soil physical properties were strongly correlated with soil fertility, with favourable physical properties occurring in highly weathered and nutrient depleted soils and with the least weathered, more fertile soils having higher incidence of limiting physical properties. Soil phosphorus concentrations varied markedly in accordance with weathering extent and appear to exert an important influence on the nitrogen cycle of Amazon forest soils.</style></abstract><work-type><style face="normal" font="default" size="100%">Article</style></work-type><accession-num><style face="normal" font="default" size="100%">ISI:000278184500011</style></accession-num><notes><style face="normal" font="default" size="100%">ISI Document Delivery No.: 603CCTimes Cited: 5Cited Reference Count: 107Quesada, C. A. Lloyd, J. Schwarz, M. Patino, S. Baker, T. R. Czimczik, C. Fyllas, N. M. Martinelli, L. Nardoto, G. B. Schmerler, J. Santos, A. J. B. Hodnett, M. G. Herrera, R. Luizao, F. J. Arneth, A. Lloyd, G. Dezzeo, N. Hilke, I. Kuhlmann, I. Raessler, M. Brand, W. A. Geilmann, H. Moraes Filho, J. O. Carvalho, F. P. Araujo Filho, R. N. Chaves, J. E. Cruz Junior, O. F. Pimentel, T. P. Paiva, R.Gordon and Betty Moore FoundationCarlos A. Quesada was funded by a scholarship from the School of Geography, University of Leeds. The final stages of data analysis and manuscript preparation were funded by the Gordon and Betty Moore Foundation, now supporting the RAINFOR project (www.rainfor.org).Copernicus gesellschaft mbhGottingen</style></notes><auth-address><style face="normal" font="default" size="100%">[Quesada, C. A.; Lloyd, J.; Baker, T. R.; Fyllas, N. M.] Univ Leeds, Sch Geog, Earth &amp; Biosphere Inst, Leeds LS2 9JT, W Yorkshire, England. [Schwarz, M.; Czimczik, C.; Schmerler, J.; Arneth, A.; Lloyd, G.; Hilke, I.; Kuhlmann, I.; Raessler, M.; Brand, W. A.; Geilmann, H.] Max Planck Inst Fuer Biogeochem, Jena, Germany. [Patino, S.] Inst Invest Recursos Biol, Bogota, Colombia. [Patino, S.] INRA, UMR ECOFOG, Korou 97310, French Guiana. [Martinelli, L.; Nardoto, G. B.] Ctr Energia Nucl Agr, Piracicaba, Brazil. [Quesada, C. A.; Santos, A. J. B.; Luizao, F. J.; Moraes Filho, J. O.; Carvalho, F. P.; Araujo Filho, R. N.; Chaves, J. E.; Cruz Junior, O. F.; Pimentel, T. P.; Paiva, R.] Inst Nacl de Pesquisas da Amazonia, Manaus, Amazonas, Brazil. [Hodnett, M. G.] Ctr Ecol &amp; Hydrol, Wallingford, Oxon, England. [Herrera, R.; Dezzeo, N.] Inst Venezuelano Invest Cient, Caracas, Venezuela.Quesada, CA, Univ Leeds, Sch Geog, Earth &amp; Biosphere Inst, Leeds LS2 9JT, W Yorkshire, England.betoquesada@yahoo.com.br</style></auth-address></record></records></xml>