298
Fig. 12. Map of nitrates in Layer 1, November 1990. (see also page 72)
Fig. 13. Map of nitrates in Layer 2, November 1990. (see also page 72)
Fig. 14. Map of nitrates in Layer 3, November 1990. (see also page 72)
N03
50
o
mgll
NOS
70
10
mgll
NOS
170
50
mgll