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15.25 With the use of hioseis increasing. investiga- tors are looking for ways in which the wood ash that is a byproduct of biomass combustion can he used. An ex- periment described in the Paper \"Wood Ash Adm'otture to Drganic Wastes Improves Compost and IE Perfor mance" ngcufturo. Ecosystems (E E mimnmont [zoos]: 4349:: lmkcd at d]: effect ofusing wood ash in compost. Comp-oats with {1%, 3%., and 15% ash were applied to Plots in an experimental field. The plots were grouped into four Hod-cs to cr-te bind-as that consisted of plots with similar soil characteristics. Treatments {the three composts} were assigned at random to H113 plots within each block. it the end of the composting period, the concentration oflead [mgi'kg] was measured. Use the accompanying data {consistent with summary quantities given in the Paper} to derernLine ifthese is evidence d't the mean lead concentration diEers for the d'll't ash concentrations. Use I1 = Jill. Block (HE. Ash BEE. Ash I695 sh I 151 Ii 39 Ell-"i T 2 511 til 33.2 El 53 33-5 Ell-"i '5" AI 153 5 villi} 33 4