Field Notes

<--2021-03-02 11:30:00 | 2021-04-01 12:45:00-->
Other sites visited today: Vaira

Tonzi: 2021-03-17 11:00:00 (DOY 76)
Author: Joe Verfaillie
Others:

Summary: Rain coming, removed COSMOS soil moisture system, removed cow chewed IRT, Installed Theta probe #6, Removed CO2 tank for old co2 profile system.

Tonzi
2021-03-17

I arrived at about 11:00 PDT. It was mild and overcast with almost no wind â€“ rain coming tomorrow. There were puddles on the road but the ground is still firm. Some of the trees have begun to put on leaves. The mutant tree near Mr Tonziâ€™s house was nearly fully leafed out. There are young cows around that came to see if I would feed them.

I installed Theta probe sn 139/052 to replace Theta #6 that I removed last time. I put it back in the same hole and tried to get at the same depth inserted vertically with its times 44-50cm deep. The soil is transitioning to decomposed granite at this depth. I added a power strip to the data logger box and rewired all the Theta probes to the power strip. They seemed to be reporting reasonable numbers.

I collected all the data logger data and the flux data. The IRT radio link had quit five days ago but a restart fixed it. The reflected PRI sensor was a little tilted I straightened it and tightened its mounting screw.

I did the Moisture Point, well depth and DBH measurements and serviced the z-cams. I collected the FD chamber data and cleared their memories.

A cow had eaten the cable for the IRT sensor sn 7385 pointed at the grass north of the Floor solar panels. From the sensor to the data logger, the cable was gone. I removed the sensor and the chewed end of the cable from the data logger.

We need a tank of CO2 in air for Pattyâ€™s isotope machine to extend its run for the planned hot spot sampling experiment at SW. So, I removed the tank from the old CO2 profile system on the tower. It still had about 1200psi in it. There is also a N2 tank which should have a similar pressure left at the tower.

I also removed the COSMOS soil moisture system. I took everything (box, tubes, solar panel, sat antenna) off the post but left the post. The project funding ended long ago and it has not sent good data in more than a year. After talking to the tech it was decided it could not be fixed remotely but they could refurbish it and use it for another project. They will send boxes and shipping labels for its return.

I was going to mount the Road well data logger box to the concrete pad but the box was missing its metal mounting flange. I brought the drill and concrete anchors but left them sitting on the pad. I hope the rain doesnâ€™t destroy the drill.

I left at about 2:30 PDT

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2021-03-17	VR_well	56.75
2021-03-17	VR_pond	18.98
2021-03-17	TZ_floor	30.85
2021-03-17	TZ_road	37.55
2021-03-17	TZ_tower	34.7

mode = both
Moisture Point Probes TZ
Array ( [0] => Tower [1] => Floor_South [2] => Soil_Transect_4 [3] => Soil_Transect_3 [4] => Soil_Transect_2 [5] => Soil_Transect_1 [6] => SoilCO2_West_A [7] => SoilCO2_West_B [8] => SoilCO2_West_C )

Date	DOY	Rep	Depth	Tower	Floor_South	Soil_Transect_4	Soil_Transect_3	Soil_Transect_2	Soil_Transect_1	SoilCO2_West_A	SoilCO2_West_B	SoilCO2_West_C	Avg	Spacial Count	Measurement Count
2021-03-17	76	0	0-15cm	33.8	20.3	12.7	24.7	22.9	19.1	30.2	25	24.1
2021-03-17	76	0	15-30cm	33.2	30.7	27.7	31.6	30.7	19.4	26.1	18.8	31.6
2021-03-17	76	0	30-45cm	34.6	38.5	26.8	31.8	34.9	32.1	34.1	24.8	37.1
2021-03-17	76	0	45-60cm	42.5	50	32.2	43.4	46.3	32.2	44.5	59.2	48.8
2021-03-17	76	1	0-15cm	33.8	19.1	13.8	25.6	22.9	19.4	29.9	24.7	25
2021-03-17	76	1	15-30cm	32.6	30.4	27.1	31	30.7	19.4	24.9	18.8	31.6
2021-03-17	76	1	30-45cm	34.6	38.5	26.8	32.4	34.1	32.1	34.3	24.8	38.8
2021-03-17	76	1	45-60cm	42.5	49.1	31.4	43.1	48.4	32.2	44.8	59.4	48.6
2021-03-17	76	Avg	0-15cm	33.8	19.7	13.25	25.15	22.9	19.25	30.05	24.85	24.55	23.72	9	18
2021-03-17	76	Avg	15-30cm	32.9	30.55	27.4	31.3	30.7	19.4	25.5	18.8	31.6	27.57	9	18
2021-03-17	76	Avg	30-45cm	34.6	38.5	26.8	32.1	34.5	32.1	34.2	24.8	37.95	32.84	9	18
2021-03-17	76	Avg	45-60cm	42.5	49.55	31.8	43.25	47.35	32.2	44.65	59.3	48.7	44.37	9	18

mode = both
Moisture Point Probes VR
Array ( [0] => Flux_Tower [1] => Biomass_Cage )

Date	DOY	Rep	Depth	Flux_Tower	Biomass_Cage	Avg	Spacial Count	Measurement Count
2021-03-17	76	0	0-15cm	13.2	9.4
2021-03-17	76	0	15-30cm	29.5	18.5
2021-03-17	76	0	30-45cm	15.6	27.6
2021-03-17	76	0	45-60cm	26.2	27.1
2021-03-17	76	1	0-15cm	12.7	9.4
2021-03-17	76	1	15-30cm	29.8	17
2021-03-17	76	1	30-45cm	15.6	27.4
2021-03-17	76	1	45-60cm	25.4	27.4
2021-03-17	76	Avg	0-15cm	12.95	9.4	11.18	2	4
2021-03-17	76	Avg	15-30cm	29.65	17.75	23.7	2	4
2021-03-17	76	Avg	30-45cm	15.6	27.5	21.55	2	4
2021-03-17	76	Avg	45-60cm	25.8	27.25	26.53	2	4

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2021-03-17	1	12.1
2021-03-17	2	11.8
2021-03-17	245	13.5
2021-03-17	3	17.5
2021-03-17	4	11.4
2021-03-17	5	4.4
2021-03-17	6	16.9
2021-03-17	7	19.6
2021-03-17	72	11.6
2021-03-17	79	10.6

No water potential data found

No TZ Grass Biomass data found

No TZ OakLeaves Biomass data found

No TZ PineNeedles Biomass data found

1 photos found

20210317TZ_Leafout.jpg ( 2021-03-17 00:00:00 ) Full size: 1440x1920
Mutant tree nearly full of leaves otherwise about 5% of trees putting on leaves