Relationship between the amount and the activity of the microbial biomass in dutch grassland soils: comparison of the fumigation-incubation method and the Substrate-induced respiration method J. Hassink text Ind Repr. from: Soil Biol. Biochem. vol. 25(5) 1993: p. 533-538.-- Bibl.: p. 538 GRASSLANDS NETHERLANDS SOIL BIOLOGY