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Guelle : ausbringungstechniken im Vergleich \ Bio-land : Fachzeitschrift fuer den Organisch-Biologischen Land- und Gartenbau [Artikel]
Gudat, J. \ Bless, H - G \ 1991
Manure application techniques are compared on their exactness of dosage, which is important for the output of ammonia
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Immigranten uit Noord-Afrika en Zuid-Europa in de Laat-Krijtzee van Noord-Europa : een samenspel van warme zeestromen, verdwenen barrieres en gunstige milieufactoren \ Grondboor en hamer [Artikel]
Bless, M.J.M. \ 1991
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