Hello I work on my thesis in soil science about processes of humus in soil. Specially I'm interested in loss of humus in subsoils over the last 15 years. Where can I get information about this problem or does someone else work on a similar topic? please mail Christian Christian Hitz, Geographisches Institut der Universitaet Zuerich-Irchel, Winterthurerstr. 190, CH-8057 Zuerich, Tel.: 01 / 257 51 14