ACIDIFICAÇÃO DOS SOLOS NA CHINA

http://www.sciencemag.org/cgi/content/abstract/sci;327/5968/1008?maxtoshow=&hits=10&RESULTFORMAT=&fulltext=soil+acidity+and+china&searchid=1&FIRSTINDEX=0&resourcetype=HWCIT

http://tempsreel.nouvelobs.com/actualites/sciences/nature/20100212.OBS6798/chine_lacidite_des_sols_menace_les_recoltes_futures.html