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<br />SOIL PORES <br />Abundance of pores by number and size <br />Very fine Fine Medium Coarse <br />Code Class (0.1-0.5 mm) (0.5-2 mm) (2-5 mm) (5-10 mm) <br /> Average number per square decimeter <br />1 Few <25 C10 <1 <1 <br />2 Common 25 to 100 10 to 50 1 to 5 1 to 2.5 <br />3 Many >200 >50 >5 >2.5 <br />Continuity: Shape: <br />discontinuous. dis vesicular. v <br />constricted. .cons irregular or <br />continuous .coot interstitial i <br /> tubular. t <br /> CLAY FILMS <br />Frequency (% of ped <br />faces and/or pores <br />• <br />containing clay films): <br />very few (<5%)...... v1 <br />few (5-25%). .... 1 <br />common (25-50~)..... 2 <br />many (50-90%)....... 3 <br />continuous (>90%)... 4 <br />Thickness• <br />thin... ..... n <br />moderately thick.... mk <br />thick ............... k <br />i <br />