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APPENDIXChemical and Physical AnalysesTable 16 presents analyses of soils that were collected for Report No . 21 (1) . In order toeliminate, as far as possible, variations due to cultural and management practices, surface soilsamples were taken from old pastures where fertilizer applications had not been recently made.The methods used for an were as follows : mechanical analysis by the hydrometermethod (19) ; pH by the glass electrode in water; base exchange capacity and exchangeable basesby the Schollenberger method (20) ; organic matter by the Allison method (21) .Table 17 presents analyses of soils that were collected for a study of soils in the vicinity ofLake Temagami (22) . The analytical methods are outlined in the Manual on Soil Sampling andMethods of Analysis (23) . The appropriate section numbers in that manual are indicated inbrackets after the soil analyses, as follows: particle size analysis, by pipette method, after pretreatmentwith hydrogen peroxide and calgon (2.11) ; pH CaCl2 (3.11) ; pH water (3.13) ; organicmatter by wet oxidation, using ortho-phenanthraline-ferrous sulfate as indicator (3.613) ;exchangeable P (4.42) ; exchangeable Ca, Mg and K (4.51) ; Fe and Al extract by oxalate (3.52) .