6/15:

Started processing these soils at about 1815 today -- rather late for samples taken about 1100, so might be a bit too dry.

Dry weights taken 21 hours later.

Comparison sensor measurements read by eye from WWW plot.

6/21: 1200

In both cases, should have driven the corer further in (collar was flush, but apparently had compacted) -- use 0-2cm in both cases.  a.soil also still had some litter and b.soil had some roots.  

6/26: 1015

A bit drier than before.  Mike Daniels helped.  I think we got the whole 3cm in the top sample, though the soil may have been compacted in the process.

7/3: 1015/1025

A bit wetter due to some rain last night.  Note that the wetness profile probably isn't uniform, though Qsoils did show an uptick.  b 0-3cm probably was compacted too much (too dense). Scales have been moved into base trailer (from AABC lab).

Date

Position

Tare (g) (g)

Wet (g) (g)

Dry (g) (g)

rho (g/cm^3)

Moist (%)

Moist (%)
EC-5

6/15

soil.a 0-3cm

7.981

74.357

48.354

0.61

39.2

 

6/15

soil.a 3-6cm

7.940

97.473

72.210

0.97

38.0

30

6/15

soil.b 0-3cm

7.945

90.836

67.464

0.90

35.2

 

6/15

soil.b 3-6cm

7.991

98.365

78.623

1.06

29.7

23

6/21

soil.a 0-3cm

7.972

51.536

29.353

0.48

50.1

 

6/21

soil.a 3-6cm

7.940

102.324

68.270

0.91

51.3

27

6/21

soil.b 0-3cm

7.927

59.973

42.641

0.78

39.1

 

6/21

soil.b 3-6cm

7.987

74.350

55.189

0.71

28.8

25

6/26

soil.a 0-3cm

7.972

116.089

79.391

1.08

55.2

 

6/26

soil.a 3-6cm

7.939

120.337

92.536

1.27

41.8

34

6/26

soil.b 0-3cm

7.926

78.270

59.924

0.78

27.6

 

6/26

soil.b 3-6cm

7.984

103.500

84.423

1.15

28.7

21

7/3

soila 0-3cm

7.990

73.581

46.360

0.58

41.0

 

7/3

soila 3-6cm

7.945

96.626

69.548

0.93

40.8

34

7/3

soilb 0-3cm

7.913

105.195

77.396

1.05

41.8

 

7/3

soilb 3-6cm

7.986

103.252

83.068

1.13

30.4

22

 

tare = c(c(7.981,7.940,7.945,7.991),c(7.972,7.940,7.927,7.987),c(7.972,7.939,7.926,7.984),c(7.990,7.945,7.913,7.985))

wet = c(74.357,97.473,90.836,98.365,51.536,102.324,59.973,74.350,116.089,120.337,78.270,103.500,73.581,96.626,105.195,103.252)-tare

dry = c(48.354,72.210,67.464,78.623,29.353,68.270,42.641,55.189,79.391,92.536,59.924,84.423,46.360,69.548,77.396,83.068)-tare

vol = c(2,3)*pi*(5.31/2)^2

moist = 100*(wet-dry)/vol[c(2,2,2,2,1,2,1,2,2,2,2,2,2,2,2,2)]

rho = dry/vol[c(2,2,2,2,1,2,1,2,2,2,2,2,2,2,2,2)]

m = array(moist,c(2,2,4))

grav.moist = t(0.5*(m[1,,]+m[2,,]))

grav.comp = t(m[2,,])

ec5 = matrix(c(30,23,27,25,34,21,34,22),ncol=2,byrow=T)

matplot(grav.comp,ec5,xlim=c(0,60),ylim=c(0,60)); abline(0,1,lty=2); abline(-8,1,col=3,lty=2)