Field Notes

<--2014-04-22 05:45:00 | 2014-05-22 05:30:00-->

Tonzi: 2014-05-08 05:50:00 (DOY 128)
Author: Siyan Ma
Others:

Summary: Predawn water potential, reinstalled tram, Trouble connecting to data loggers at Vaira, no moisture point data, standard fieldwork.

When: Date: 5/8/2014 , Day: 128 , Watch Time: 5:50 am .
Where: Tonzi/Vaira Ranch
Who: Siyan
Weather: Cloudy in the early morning; sunny after 9:00am; Dew on the grasses
Phenology: Grass at filling stage, still green; a lot of wild oat, ~70 cm tall at least

Summary

Put Tram cart back.
Measured predawn water potential, still good!
Checked and downloaded winflux and met data from PC at Tower and Floor.
Connections to met and soil Co2 datalogger were not working at Vaira. So, data were downloaded directly from the datalogger.
Served Z-cams.
The CO2 profile system was calibrated on site.
Read dendrometers
Soil moisture wasnâ€™t measure because no power when I turn it on. When I put the device on the charge in the lab, it seems full in power. I donâ€™t know why.
Measured grass height
Collected grass samples
Measure groundwater well

Vaira_Grass Site

Fence and gate power: 12 v.
Downloaded Phenocam images.
Swapped the memory cards of CR1000.
Checked the fans of air temp and relative humidity sensors at Vaira. YES!
Downloaded met and soil CO2 profile data directly from each datalogger due to the connection at the PC station didnâ€™t work properly.

Checked levels of Radiation sensors, clear up surfaces.YES!
Checked rain gage, make sure not clogged. YES!
Closed gate and set up fence. YES!

Tonzi_Tower Site

Fence and gate power: 12 v.
downloaded Winflux data from PC. YES!

swapped the memory cards of CR1000.

download Phenocam images. Yes!
checked the fans of air temp. and relative humidity sensors on the tower and the floor. YES!
Checked rain gage, make sure not clogged. YES!
Downloaded met data from PC
Checked CO2 profile:

Is the pump runningâ€Œ YES!
before zero

after zero

before span

After span

9. closed gate and set up fence. YES!
Toniz_Floor Site

Fence and gate power: 12 v.
downloaded Winflux data from PC. YES!

Swapped the memory cards of CR1000.

downloaded met data from PC. YES!

CR23X3 â€“ floor-Met
CR23X6 â€“ tower-Met
CR10X2 â€“ floor-Met
Soil CO₂ profile: CR23X5 â€“ soil CO₂ profile

Closed gate and set up fence. YES!

Veg Height (cm): Tape measure from ground to top of plant
37, 33, 30, 40, 20, 55, 46, 30, 38, 70, avg = 39.9, stdev = 14.23

Field Data

CO2 Profile Tanks

Date	Tank	Pressure (psi)	ppm
2014-05-08	CO2	1800	402.68
2014-05-08	N2	500	0

Well Depth

Date	Location	Depth (feet)
2014-05-08	TZ_floor	29.8
2014-05-08	TZ_road	37.4
2014-05-08	TZ_tower	38

No TZ Moisture Point data found

No VR Moisture Point data found

Grass Height TZ 10

Date	Height reps (cm)										Location	Average	Samp	STDEV
2014-05-08	37	33	30	40	20	55	46	30	38	70	GH_ALL	39.9	10	13.5

Grass Height VR 6

Date	Height reps (cm)						Location	Average	Samp	STDEV
2014-05-08	28	22	26	35			GH_CLOVER	27.75	4	4.71
2014-05-08	120	100	80	60	130	80	GH_GRASS	95	6	24.32

Tree DBH

Date	Tag#	Reading (mm)
2014-05-08	1	25.5
2014-05-08	2	21.2
2014-05-08	3	23.7
2014-05-08	5	26.2
2014-05-08	7	21.9
2014-05-08	72	18.4
2014-05-08	79	23.1
2014-05-08	8	12.5

Water Potential - mode: raw

Time< h>	Species	Tree	readings (bar)
2014-05-08 05:58:00	OAK	102	-3	-3	-4
2014-05-08 05:58:00	OAK	35	-3.5	-3	-3
2014-05-08 05:58:00	OAK	92	-5	-3	-4
2014-05-08 06:20:00	PINE	OLD	-6	-12	-8
2014-05-08 06:20:00	PINE	YNG	-7	-2	-5	-11	-15
2014-05-08 12:28:00	OAK	102	-12	-21	-15
2014-05-08 12:28:00	OAK	35	-22	-17	-22
2014-05-08 12:28:00	OAK	92	-18	-25	-30
2014-05-08 12:54:00	PINE	OLD	-25	-18	-181
2014-05-08 12:54:00	PINE	YNG	-6	-5	-9