Field Notes

<--2021-03-17 11:00:00 | 2021-04-18 11:00:00-->
Other sites visited today: West Pond | Bouldin Corn | Vaira

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] => 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
2021-04-01	91	0	0-15cm	30.5	13.2	38.9	17.3	17.9	13.2	16.2	19.4	15.9
2021-04-01	91	0	15-30cm	31.3	31	22.8	27.4	29.2	15.2	33.2	14.8	27.7
2021-04-01	91	0	30-45cm	31.8	41.6	26.2	29	33.8	32.1	41	22.3	36.3
2021-04-01	91	0	45-60cm	43.1	50.3	30.8	40.3	48.6	33.4	26.2	58.3	49.4
2021-04-01	91	1	0-15cm	30.8	13.8	39.9	17.6	17.3	13.5	15	19.1	16.5
2021-04-01	91	1	15-30cm	31.3	31.3	23.7	27.1	29.2	16.1	33.8	14.8	27.4
2021-04-01	91	1	30-45cm	32.7	41.3	25.7	28.5	33.5	31.5	41	31.5	36.8
2021-04-01	91	1	45-60cm	42	52.3	30.5	41.7	51.7	33.7	26.8	51.4	50.3
2021-04-01	91	Avg	0-15cm	30.65	13.5	39.4	17.45	17.6	13.35	15.6	19.25	16.2	20.33	9	18
2021-04-01	91	Avg	15-30cm	31.3	31.15	23.25	27.25	29.2	15.65	33.5	14.8	27.55	25.96	9	18
2021-04-01	91	Avg	30-45cm	32.25	41.45	25.95	28.75	33.65	31.8	41	26.9	36.55	33.14	9	18
2021-04-01	91	Avg	45-60cm	42.55	51.3	30.65	41	50.15	33.55	26.5	54.85	49.85	42.27	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
2021-04-01	91	0	0-15cm	8	5.9
2021-04-01	91	0	15-30cm	24	14.4
2021-04-01	91	0	30-45cm	12.6	23.5
2021-04-01	91	0	45-60cm	23.6	25.9
2021-04-01	91	1	0-15cm	7.7	6.2
2021-04-01	91	1	15-30cm	24	14.2
2021-04-01	91	1	30-45cm	14	24
2021-04-01	91	1	45-60cm	24.2	25.6
2021-04-01	91	Avg	0-15cm	7.85	6.05	6.95	2	4
2021-04-01	91	Avg	15-30cm	24	14.3	19.15	2	4
2021-04-01	91	Avg	30-45cm	13.3	23.75	18.53	2	4
2021-04-01	91	Avg	45-60cm	23.9	25.75	24.83	2	4

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