Removed three T2R1 and three T2R6 sensors that were logging moisture over the winter. In T2R1, we installed one TOMST sensor next to sensor three and one next to six. 6=TMS95147382 and 3-TMS 95147381. Removed between 12:30-1:00PM

Senor 3,4, and 6 in T2R1 and sensor 1,2, and 7 in T2R6. sensor 1 was cut.

LTAR, BCSE gas vial and tote prep - Helen

Lachat run LTER Lysimeters 04/03/2023.

LTAR, BCSE gas chamber prep - Helen

Prepared standards.

Prepared fresh Phosphate Buffer (1L) 28 gms Sodium Hydroxide pellets 50 gms sodium phosphate dibasic heptahydrate dilute to 1 L with nanopure.

Prepared EDTA Reagent (1L) 66 gms ethylenediamine tetraacetic acid disodium salt dihydrate (EDTA) Approximately 7.0 gms sodium hydroxide pellets ph to 7.03 with NaOH pellets then dilute to volume with nanopure.

Acid washed dishes.

Collect LTER leachate - Helen, Alex

Weigh and filter LTER leachate, dishes - Helen

Evacuate LTER lysimeters; reinstall T6 station flags (switchgrass harvested 4/10/2024 and 4/15/2024); mark forest paths and trim back vines - Alyssa, Helen

The Licor in the trailer disappeared from the network at 2024-4-12 19:30 EDT. I had to power down the instrument using the button on the side and restore power to get it to reconnect the network. Before restarting the Licor I tried to reconnect the network by removing and reinserting the ethernet cable, thinking that it would notice the loss of the ethernet cable and reset the network stack, but that did not work. After restarting the instrument indicated a plugged inlet, I removed both inlet and outlet lines and restarted the licor from the web panel. It started normally. I re-attached the inlet and outlet lines and restared the gashog app.

reduced the amount of blank samples measured.

Checked Interactions/ Switchgrass Biodiversity soil moisture probes. I have 3 probes working in each logger. Each logger had one probe that did not respond to a direct connection with the A200. The missing probes are

• north logger: address 0 depth 10
• east logger: address 7 depth 10
• middle logger: address 5 depth 10
• south logger: address 5 depth 10

https://houghton.kbs.msu.edu/d/edg5891xpbcaoc/switchgrass-biodiversity-soil-moisture?orgId=1&refresh=1m

Grind plants, dishes - Alex

Grind plants - Helen

Wash dishes - Alex

LTAR Series 4 gas sampling; ASP2 chambers were installed on the morning of sampling - Alyssa, Helen, Alex

Hydrosense LTAR moisture - Helen

Acid washed dishes and reagent containers from Channel 1.

LTER Series 1 gas sampling. No soil moisture tins… moisture from Hydrosense (Kevin) - Stacey, Alyssa, Helen, Alex, Dave (trained by Kevin)

LTER and LTAR gas chamber prep - Helen

Lachat run LTER Lysimeters 03/21/23

LTER gas vial, tote prep - Alyssa, Stacey

Filter 1st April LTER soil extracts - Helen

Finished 1st April LTER soil sampling - Alyssa, Helen

Finished sieving LTER soil - Alyssa, Helen

Weigh 1st April LTER soil for extraction and moisture - Stacey, Helen, Alyssa

Sieved LTER soil - Alyssa, Helen

Installed electrical conduit for ASP3F1 EC tower. Used 3/4” conduit and 4AWG black/red wire on a 100’ run. Buried minimum 16” to max 20” along trench. Used Ditch Witch. KK, DW.

LTER 1st April soil sampling (finished MCSE R1-5 and T4R6) - Helen, Alyssa

Grind plants, wash dishes - Alex

LTAR Series 2 and 3, datafile LTAR2024403280404S2S3BGC notes: Series 2 had a number of vials out of order received by techs. All vials run in order on GC. Vial order from techs in trays: …95, 96, 117, 101, 99, 100, 121, 102, 103…. then …115, 116, 97, 118, 119, 120, 98, 122, 123…. Series 3 only had one vial pair out of order - 57 and 58 were swapped in the tray. All vials run in numerical order.