APIS Bibliography

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2002

Butterbach-Bahl K, Willibald G, Papen H. Soil core method for direct simultaneous determination of N-2 and N2O emissions from forest soils. Plant and Soil. 2002 ;240:105-116.

1998

Rennenberg H, Kreutzer K, Papen H, Weber P. Consequences of high loads of nitrogen for spruce (Picea abies) and beech (Fagus sylvatica) forests. . New Phytologist. 1998 ;139:71-89.