Field Notes

<--2021-03-17 11:00:00 | 2021-04-18 11:00:00-->
Other sites visited today: West Pond | Bouldin Corn | Vaira
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Tonzi: 2021-04-01 12:45:00 (DOY 91)
Author: Joe Verfaillie
Others:

Summary: Dry and warm, tree half way through putting on leaves, more chewed wires near IRT cal panel, Tree 2 soil CO2 system power down, cordless drill gone, serial numbers

Tonzi
2021-04-01

I arrived at about 12:45 PDT. It was clear sunny and warm with a breeze from the west southwest that would come and go. All the trees have leaves but most are about halfway to full leaves. The pond is only half full and the road and expose ground is dry. Several more dead trees are noticeable now. Young cows came to see if I would feed them. In quiet periods waiting for the moisture point to do its thing, I could hear this background drone of flying insects surrounding me. Very few were to be seen but I could hear the hum of their wings in the air. There were a bunch of wood peckers making lots of noise too.

I collected the Tower data. The IRT had lost its radio link again but resetting it restored the connection.
The Tower 7500 read: 410.4ppm CO2, 442.2mmol/m3 H2O, 27.2C, 98.9kPa, 101.5SS
The Floor 7500 read: 415.0ppm CO2, 492.5 mmol/m3 H2O, 28.7C, 99.2kPa, 101.9SS

I was going to put back the IRT I found chewed by cows last time but I was missing a resistor in the cable end that I had removed when I splice on a new cable. I also discovered two more cables that had been chewed either more recently or I just missed them last time. The cable to the cal panel IRT I was able to cut off the chewed portion and reconnect (This is how I found out about the resister). The cable to the 10X by the tree was also chewed but maybe not broken. Again I was able to cut off the chewed portion and reconnect it. I fixed the wire fence around the location.

There was also no soil co2 data from the 10X by Liukang's tree. With nothing connected there was 27V on the power line but as soon as I powered something it dropped to less than 7V. I disconnected the power line at the charge controller connected the positive and negative together to measure the round trip resistance - it was something like 3MOhms. There's probably a rotten place in the wire with just enough left to pass the voltage but not any current. It would be nice to have time or some help to look at the data before we decide what to do with the soil co2 system at Tonzi and Vaira.

I did the well, DBH and moisture point measurements. I had bad connections to moisture point probes 4 and B - they may be next to die.

The cordless drill I forgot last time near the road well is gone - I'll have to buy a new one. The cows had kicked the Global Water box around a bunch. I straightened it out and seems no harm was done. The lithium power pack was dead and I swapped it for a fresh one. Then I piled some rocks on the box to discourage the cows.

I wrote down some serial numbers
PAR in sn 010164
PAR out sn 030382
Tower HMP45 sn W0730035
Floor HMP45 sn W0510026

I left at 16:12 PDT

Field Data

No tank data

Well Depth

Date	Location	Depth (feet)
2021-04-01	VR_well	56.2
2021-04-01	TZ_road	38.4
2021-04-01	TZ_tower	34.35
2021-04-01	TZ_floor	30.4

mode = both
Moisture Point Probes TZ
Array ( [0] => Tower_1 [1] => Floor_South_1 [2] => Soil_Transect_4_1 [3] => Soil_Transect_3_1 [4] => Soil_Transect_2_1 [5] => Soil_Transect_1_1 [6] => SoilCO2_West_A_1 [7] => SoilCO2_West_B_1 [8] => SoilCO2_West_C_1 [9] => Tower_2 [10] => Floor_South_2 [11] => Soil_Transect_4_2 [12] => Soil_Transect_3_2 [13] => Soil_Transect_2_2 [14] => Soil_Transect_1_2 [15] => SoilCO2_West_A_2 [16] => SoilCO2_West_B_2 [17] => SoilCO2_West_C_2 [18] => Tower_3 [19] => Floor_South_3 [20] => Soil_Transect_4_3 [21] => Soil_Transect_3_3 [22] => Soil_Transect_2_3 [23] => Soil_Transect_1_3 [24] => SoilCO2_West_A_3 [25] => SoilCO2_West_B_3 [26] => SoilCO2_West_C_3 [27] => Tower_4 [28] => Floor_South_4 [29] => Soil_Transect_4_4 [30] => Soil_Transect_3_4 [31] => Soil_Transect_2_4 [32] => Soil_Transect_1_4 [33] => SoilCO2_West_A_4 [34] => SoilCO2_West_B_4 [35] => SoilCO2_West_C_4 )

0000

Date	DOY	Rep	Depth	Tower_1	Floor_South_1	Soil_Transect_4_1	Soil_Transect_3_1	Soil_Transect_2_1	Soil_Transect_1_1	SoilCO2_West_A_1	SoilCO2_West_B_1	SoilCO2_West_C_1	Tower_2	Floor_South_2	Soil_Transect_4_2	Soil_Transect_3_2	Soil_Transect_2_2	Soil_Transect_1_2	SoilCO2_West_A_2	SoilCO2_West_B_2	SoilCO2_West_C_2	Tower_3	Floor_South_3	Soil_Transect_4_3	Soil_Transect_3_3	Soil_Transect_2_3	Soil_Transect_1_3	SoilCO2_West_A_3	SoilCO2_West_B_3	SoilCO2_West_C_3	Tower_4	Floor_South_4	Soil_Transect_4_4	Soil_Transect_3_4	Soil_Transect_2_4	Soil_Transect_1_4	SoilCO2_West_A_4	SoilCO2_West_B_4	SoilCO2_West_C_4	Spacial Count
2021-04-01	91	0	nan	30.5	13.2	38.9	17.3	17.9	13.2	16.2	19.4	15.9	31.3	31	22.8	27.4	29.2	15.2	33.2	14.8	27.7	31.8	41.6	26.2	29	33.8	32.1	41	22.3	36.3	43.1	50.3	30.8	40.3	48.6	33.4	26.2	58.3	49.4
2021-04-01	91	1	nan	30.8	13.8	39.9	17.6	17.3	13.5	15	19.1	16.5	31.3	31.3	23.7	27.1	29.2	16.1	33.8	14.8	27.4	32.7	41.3	25.7	28.5	33.5	31.5	41	31.5	36.8	42	52.3	30.5	41.7	51.7	33.7	26.8	51.4	50.3
2021-04-01	91	Avg	0-15cm																																					0
2021-04-01	91	Avg	15-30cm																																					0
2021-04-01	91	Avg	30-45cm																																					0
2021-04-01	91	Avg	45-60cm																																					0

mode = both
Moisture Point Probes VR
Array ( [0] => Flux_Tower_1 [1] => Biomass_Cage_1 [2] => Flux_Tower_2 [3] => Biomass_Cage_2 [4] => Flux_Tower_3 [5] => Biomass_Cage_3 [6] => Flux_Tower_4 [7] => Biomass_Cage_4 )

0000

Date	DOY	Rep	Depth	Flux_Tower_1	Biomass_Cage_1	Flux_Tower_2	Biomass_Cage_2	Flux_Tower_3	Biomass_Cage_3	Flux_Tower_4	Biomass_Cage_4	Spacial Count
2021-04-01	91	0	nan	8	5.9	24	14.4	12.6	23.5	23.6	25.9
2021-04-01	91	1	nan	7.7	6.2	24	14.2	14	24	24.2	25.6
2021-04-01	91	Avg	0-15cm									0
2021-04-01	91	Avg	15-30cm									0
2021-04-01	91	Avg	30-45cm									0
2021-04-01	91	Avg	45-60cm									0

No TZ grass heigth found

No VR grass heigth found

Tree DBH

Date	Tag#	Reading (mm)
2021-04-01	1	12.1
2021-04-01	102	7.8
2021-04-01	2	11.5
2021-04-01	245	13.5
2021-04-01	3	17.9
2021-04-01	4	11.9
2021-04-01	5	4.7
2021-04-01	6	17.0
2021-04-01	7	19.9
2021-04-01	72	11.8
2021-04-01	79	10.7