Field Notes

Tonzi: 2014-03-27 00:00:00 (DOY 86)
Author: Siyan Ma
Others: Dennis

Summary: oak leaf-out, grass green, no cows at either site, Checked CO2 probes at Vaira - ok, Removed last of sap flow east station, swapped CO2 profile CO2 tank, zcam 1 down, Moved CO2 probes at Tonzi

When: Date: 3/27/2014 , Day: 86 , Watch Time: 10:00 am .
Where: Tonzi/Vaira Ranch
Who: Siyan Dennis
Weather: cloudy, shower about 10 minutes
Phenology: oak leaf-out; grass green; no cows at both sites.

Summary

Checked flux and met data from PC at Tower, Floor, and Vaira, but no data were downloaded this time.
Dennis put a new tank of CO2 for calibrating the CO2 profile system.
Dennis cleaned up the sap flow sensors near the road well.
Relocated probes at Tonzi-open profiles to Tonzi-Tree2.
Read dendrometers.
Measured grass height.
Measured groundwater well.
Collected grass samples for LAI at Tonzi and Vaira.

Vaira_Grass Site

Checked the fans of air temp and relative humidity sensors at Vaira. YES!
Checked soil CO2 profiles: all probes were dry.
Checked levels of Radiation sensors, clear up surfaces.YES!
Checked rain gage, make sure not clogged. YES!
Cleaned the surface of Li-7500. YES!
Closed gate and set up fence. YES!

Tonzi_Tower Site

checked Winflux data from PC.

checked the fans of air temp. and relative humidity sensors on the tower and the floor. YES! Reconnected the broken (black) wires.
Checked rain gage, make sure not clogged. YES!
Cleaned the surface of Li-7500. YES!
Checked CO2 profile: Dennis put a new tank of CO2 for calibrating the CO2 profile system.

Tank
N2,700,10
CO2,1900,5,402.68ppm
Is the pump runningâ€Œ YES!

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

Checked EC system

Checked 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!

Soilco2
Moved soil CO2 sensors:
1%, sn z2720012, moved from Open -2cm to Tree2 -4cm
1%, sn x4840007, moved from Open -4cm to Tree2 -2cm
3%, sn f4960020, moved from Open -8cm to Tree2 -8cm
need more U PVC connectors

Veg Height (cm): Tape measure from ground to top of plant
6, 4, 7, 10, 4, 7, 5, 7, 4, 5, 7, 7, avg = 6.1, stdev = 1.78

Field Data

CO2 Profile Tanks

Date	Tank	Pressure (psi)	ppm
2014-03-27	CO2	1900	402.68
2014-03-27	N2	700	0

Well Depth

Date	Location	Depth (feet)
2014-03-27	TZ_floor	30.8
2014-03-27	TZ_road	38.8
2014-03-27	TZ_tower	34.7

No TZ Moisture Point data found

No VR Moisture Point data found

Grass Height TZ 12

Date	Height reps (cm)												Location	Average	Samp	STDEV
2014-03-27	6	4	7	10	4	7	5	7	4	5	7	7	GH_ALL	6.08	12	1.71

Grass Height VR 16

Date	Height reps (cm)																Location	Average	Samp	STDEV
2014-03-27	20	20	21	20													GH_FENCED	20.25	4	0.43
2014-03-27	13	18	22	16	5	14	12	17	18	24	17	24	13	13	16	18	GH_OUT	16.25	16	4.64

Tree DBH

Date	Tag#	Reading (mm)
2014-03-27	102	22.9
2014-03-27	2	19.8
2014-03-27	245	16.3
2014-03-27	3	22.1
2014-03-27	4	1.1
2014-03-27	5	25.5
2014-03-27	7	20
2014-03-27	72	17.1
2014-03-27	79	23
2014-03-27	8	11.2

No water potential data found

Biomass TZ Grass

Date	rep	AREA (cm2)	LEAFAREA (cm2)	Green WETWT (g)	Green DRYWT (g)	LAI (m2/m2)	Green WETWT/AREA (g/m2)	Green DRYWT/AREA (g/m2)	Brown WETWT/AREA (g/m2)	Brown DRYWT/AREA (g/m2)
2014-03-27	0	400	108	6.34	0.62	0.27	587.04	57.41	0	0
2014-03-27	1	400	223	3.22	1.07	0.56	144.39	47.98	0	0
2014-03-27	2	400	205	3.77	0.98	0.51	183.9	47.8	0	0
2014-03-27	SUM
2014-03-27	CNT	3	3	3	3	3	3	3
2014-03-27	AVG					0.45	305.11	51.06