When: Datae 4/20/2008 , Day: 111 , Watch Time: 5:30am .
Where: Tonzi/Vaira Ranch
Who: Siyan and Xingyuan
Weather: clear, windy, cold
Phenology

• Grasses at Vaira and Tonzi have passed leaf developing period.
• Grasses at Tonzi looked greener than those at Vaira.
• Grasses at Vaira started turning to yellow.
• TDR probes showed that the top three layers were pretty dry already. The forth layer looked OK, around 40%.

Summary

1. The first pre-dawn and mid-day water potential this year. The pre-dawn values were around 1 – 5 bar.
2. EC systems worked well, and data were downloaded. Notice that power juice wasn’t enough for turning on the screen in the early morning. We may need put two more batteries on the floor site.
3. grass samples for LAI and phenology in Tower and Vaira, oak branches for N
4. soil moisture measurement
5. dendrometer readings
6. spectrometer measurement at Vaira and Tonzi.

Vaira_Grass Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: 14.0 v; amps; amps.
3. Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 – 5 v.)

Time
Path/File name	D:\Data\V08_111 .flx D:\Data\VR08 .raw
	mean	std		mean	std
w	0..14	0.359	Ts	11.1	4.587
u	2.22	1.488	H2O	1.48	0.04
v	0.27	6.489	CO2	2.01	0.043
			Tc	0.832	0.12

1. downloading data YES!
2. check the fans of air temp. and relative humidity sensors at Vaira. YES!
3. Check MD-9 system connections: YES!
4. Check levels of Radiation sensors, clear up surfaces. YES!
5. Clean up the rain gage: YES!
6. Closed gate and set up fence. YES!

Tonzi_Tower Site

1. Fence and gate power: >12 v.
2. Panel and Batteries: 12.0 v; 0.0 amps; 5.9 amps.
3. Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 – 5 v.)

Time
Path/File name	D:\Data\T08_ 111 .flx D:\Data\TW08 .raw
	mean	std		mean	std
w	-0.32	0.312	Ts	7.938	0.332
u	-2.88	0.516	H2O	1.637	0.006
v	1.63	0.427	CO2	2.162	0.009

1. downloading data YES!
2. check the fans of air temp. and relative humidity sensors on the tower and the floor. YES!
3. Check calibration cylinders;

CO₂ 1700 psig; flow 20 psi.
N₂ 1700 psig; flow 20 psi.
Manually calibrate Li-800. Following Ted’s instruction: H:\IoneSavanna_2004\Tower_2004\CO2Profile\LI800_Calibration_Procedure_2Nov04.txt
Is the pump running‌

1. close gate and set up fence. YES!

Toniz_Floor Site

1. Fence and gate power: 12 v.
2. Panel and Batteries: 12.4 v; 0.8 amps; 2.2 amps. (9:00am)
3. Reading from Gillsonic screen before downloading data. (The value of H₂O and CO₂ should be in the range of 0 – 5 v.)

Time
Path/File name	D:\Data\F08_ 111 .flx D:\Data\FL08 .raw
	mean	std		mean	std
w	0.07	0.046	Ts	4.34	0.16
u	0.22	0.141	H2O	1.46	0.078
v	-0.:83	0.13	CO2	2.28	0.011

1. downloading data: YES!
2. Check MD-9 system connections

CR23X3 – floor-Met
CR23X5 – soil CO₂ profile
CR23X6 – tower-Met
CR10X2 – floor-Met
CR10X4 – sap-flow
CR10X7 – CO₂ profile
CR10X8 – wind profile

1. Soil CO₂ profile

Reading from datalogger

Panel temp		3.1
Battery voltage		12.1
CO2E_1	262	TCE_1	10	CO2W_1	1155	TCW_1	9.3
CO2E_2	367	TCE_2	9.6	CO2W_2	1238	TCW_2	31
CO2E_3	651	TCE_3	12	CO2W_3	2040	TCW_3	9.4
CO2E_4	940	TCE_4	15	CO2W_4	2930	TCW_4	13.6

Reading from panels of analyzers

depth	Open	order	depth	Tree	order
2cm (1%)	540	1	2cm (1%)	2220	1
4cm	740	2	4cm	2330	2
8cm	1320	3	8cm	3850	3
16cm	1900	4	16cm	5870	4

1. Close gate and set up fence. YES!

tonzi	7931AFE	402165	574B4B	402FF3	574632	7A432E	7A3C6E	7A3B40	7A4AAA
20-Apr-08	111
	SM
0-15	10.3	9.3	16.5	9.6	11.7	8.7	10.1	11.3	8.2
15-30	16.8	15.0	12.6	16.3	12.1	9.6	14.8	20.7	8.2
30-45	25.8	26.3	19.9	23.9	18.3	15.6	18.2	24.3	23.6
45-60	29.4	38.2	23.5	45.6	34.4	19.3	20.9	40.4	18.6
	A6D882B	A3D04E8	A6D72F5
0-15	15.0	11.3	4.4
15-30	11.5	11.2	14.1
30-45	23.5	23.1	17.9
45-60	31.9	34.8	29.7
vaira	57318a	7933dee
0-15	2.6	3.7
15-30	11.5	12.0
30-45	17.6	18.3
45-60	21.9	25.0

Tonzi
Dendrometer
Date	Day	Tag #	Reading (cm)
4/20/2008	111	71	x
		72	9.8
		77	Broken
		78	Broken
		79	12.5
		245	4.7
		248	14
		250	10.1
		255	X
		‌252‌	X
		102	4.9

Sample sheet for MIBA

Sample vial	What
MIBA-US-01.178	Leave 1
MIBA-US-01. 179	Leave 2
MIBA-US-01. 180	Grass 1
MIBA-US-01. 181	Grass 2
MIBA-US-01. 182	Soil in 10 cm
MIBA-US-01. 183	Stem 1
MIBA-US-01. 184	Stem 2