Re: DDe^ o+? Mekong Delta

["Vu Nguyen Thanh" <thanh@ulmus.riken.go.jp>]

Cha`o ba'c Bu+?u Long va` ca? nha`,
(Xin lo^~i anh Bu+?u Long dda`nh tha^'t le^~ go.i ba'c 
xu+ng to^i cho ho+.p le^. la`ng). 
Ba'c  Bu+?u Long la`m o+n gia?i thi'ch ho^. "phe`n" o+?
dda^y nghi~a la` gi`, ma` la`m sao la.i xanh nu+o+'c 
ddu+o+.c.  Theo to^i hie^?u ma`u xanh thu+o+`ng ddi lie^`n
vo+'i Cu2+.  Ion na`y trong dda^'t nghe chu+`ng hie^'m.
Vo+'i la.i dda('p dde^ thi` se~ la`m ha. mu+.c nu+o+'c
nga^`m sao la.i no^?i phe`n le^n ddu+o+.c.   Theo
to^i thi` dda^'t chua vi` ly' do kha'c.  Trong ddie^`u kie^.n
anaerobic thi` lu+u huy`nh na(`m o+? reduced form.  Khi
nu+o+'c nga^`m ru't no' bi oxidised tha`nh H2SO4 do ddo'
pH co' the^? xuo^'ng to+'i 2-3 gi` ddo'.  Dda^'t na`y thi`
kho^ng tro^`ng lu'a ddu+o+.c ro^`i nhu+ng tro^`ng du+'a
thi` tuye^.t.   Lu'a thi` re? tie^`n ma` ta cu~ng co' nhie^`u
ro^`i chu+' du+'a thi`...nhem nhem...ngon la('m.
Dda('p dde^ se~ chu? ddo^.ng ho+n, nghe no'i bo.n 
ta`u  no' la`m dda^.p o+? thu+o+.ng nguo^`n muo^'n cho
ta lu.t lu'c na`o tu`y thi'ch.  Vo+'i la.i kho^ ra'o se~ ddo+~
muo^~i ba'c a., ma` ve^. sinh nu+~a chu+' tha^'y ba?o
nhie^`u no+i co`n chu+a co' nu+o+'c sa.ch ma` uo^'ng.
Ta^'t nhie^n se~ a?nh hu+o+?ng to+'i sinh tha'i kie^?u
nhu+ kho^ng co' muo^~i da^~n to+'i do+i va` nha'i gia?m
tie^'p theo la` ra('n gia?m, nha~n cho^m cho^m ta(ng
sau ddo' la` chuo^.t va` kie^'n ta(ng...Ha^.u qua? cha('c
co' le~ cu~ng dde^'n nhu+ Netherlands la` cu`ng.
Tho^i ca'c ba'c thu+' lo^~i to^i pha?i ddi cho ga` a(n.
Tha`nh