D296, Oct 22,2000

Start the official Experiment

clear and windy.

Finishing up on setting up the flux system.

lat: 38o 24.400 N

long: 120o 57.044 W

1255 pst set time on PC to atomic clock on gps

soil moisture (channels on CR10x)

ch 1: 0.188; loc 20; sensor sn 54/015

ch 2 ; 0.221; loc 21; sensor sn 54/016

ch 3: 0.264; loc 22; sensor sn 54/017

ch 4: 0.314; loc 23; sensor sn 54/019

ch 5 ; 0. 196; loc 24; sensor sn 54/020

Tested soil moisture sensors with value at surface in same location

Ch 1: 0.3591 v; loc 20; sensor 15; dielectric=2.760

Ch 2: 0. 31508; loc 21; sensor 16; dielectric=2.598

Ch 3: 0.30588 v; loc 22; sensor 17; dielectric=2.563

Ch 4: 34589 v; loc 23; sensor 19; dielectric=2.712

Ch 5: 3258 v; loc 24; sensor 20; dielectric=2.638

Zeros (Zeroed on Nov 19)

Ch 1: xxxx v; loc 20; sensor 15

Ch 2: 0.0705 v; loc 21; sensor 16; dielectric=1.494

Ch 3: 0.08262 v; loc 22; sensor 17;dielectric=1.557

Ch 4: xxxx v; loc 23; sensor 19

Ch 5: 0.07 v; loc 24; sensor 20; dielectric=1.488

The dry values of are reasonable and are in the range of 1.6 for mineral and 1.3 for organic soils.

Soil can L7 C wet 181.4 g; dry 168.17 g

Can wt: 28.8

Volume: 160 ml

Relative soil moisture: 13.23/160 = 0.0826 g/ml

Bulk density: 0.871

Soil can L11E

201.33g wet; dry: 189.06 g

can wt: 28.8

Volume: 160 ml

Relative Soil moisture: 12.27/160 = 0.0766 g/mL

Bulk Density: 1.001

These values are within the range of bulk densities observed with the larger sample. We note that the measure of volume is not perfect. We cut cores of soils out with the soil can. Then measured volume by dumping the soil in a graduated cylinder.

Other measures of Bulk density, vol 175 ml, can 28.8. These were conducted to improve upon the sample size.

While the zero seems good, I am not trusting the wet value

Grass height

Green:

5,2,4,4,6,2,4,7,6,4,5,4,8,4,8,12,5

mean: 5.375 +/- 2.5 cm

Dead:

20,13,7,16,9,10,13,18,20,7,5,8,20,4,8,18,5

mean: 11.8 cm +/- 5.8

1435 finally able to talk to the campbells