The content of arsenic in the surface soils
from the CAFO zone was weakly correlated to TOC
(r2 = 5.7 102, p = 0.047), while no significant linear correlation
(r2 = 2.7 105, p = 0.97) was observed between arsenic and TOC
contents in the agricultural soils from the Pearl River Delta. Chemical
fertilizers are overwhelmingly used on agricultural lands in the
Pearl River Delta.