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_. __ -. _ -_ _. __— �..--r r.-......+. -eu.....:ca.c B•ree�:... y>.>s.a ws.>J...tl s......w+.a w.. .:dw <br /> f <br /> N <br /> ((� 17 <br /> 0 °T® 1.very fine gronulat <br /> ®® <br /> 2.11"o ®ronin@! / <br /> 3•Ined or costo@ 'ronulat <br /> M 10 9 ® .60 ®-blocky, ®1@1y.or moseive ® ® Mir <br /> •• ® %OMe0 SOIL STRUCTURE <br /> ® <br /> 1 2 50 tc # <br /> 1-' to 20 80— 3/ . / / <br /> / / <br /> ® ®``o \ \ ®® ® 0 Al <br /> Z ` \ \ / I / <br /> b' U) \°` �. .. ...... .... s. .30 5....... <br /> Ki 50 °` y — .20 .70 --� / <br /> 010 <br /> 0tQ <br /> rd a 70 \ ® O .50 <br /> � � � ` Y • 6♦ g. PERMEABILITY <br /> PERCENT SAND a 0: 40 <br /> h ®® (0.10-2.OMM) \ 20 ®° td <br /> , \ 15 <br /> 0 u ✓ / <br /> 90- r.30 ® — <br /> ®®®® ® 6.very slow <br /> 100 ® r� / s• emew <br /> aaea}�+++ ae+s see+ 0.L® ® 4• slow 10 mod. <br /> 0 FROCtMe1: atth appropriate data,ester scale at left and proceed to pints representing W / / ® 3• modeecle <br /> i the .ell's 1 fond(0.10.1.0 wa), 1 organic matter. structure. aha uo sha <br /> permeability. 1a that}g t• !, / 2-mad to rapid <br /> loterpotote between plotted curves. the dotted line illustrate$procedure for a lett having: O ,(0 /7/ 1•rop10 <br /> shW10041111111uts Its. sand St.ON t.@l. structure W10041111111 s. Solution: g.0.11. 1 <br /> 1L <br /> a 00,0 <br /> FIGURE 3.—Tho soll•aodibility nomograph. Where the x111 traction don not sassed 70 percent, ohs equation Is 100 K-- 2.1 M'•'° (10) (IZ —o)-{•3.23 Ib-Z)-} 2.3 (c—') <br /> Q1 <br /> ' whore M= (percent at+vis) (100—percent d, a=Percent organic mollor, b - structure code, and c=profile permeability class. <br /> I'T <br /> 1 <br />