Projectlog Entries List

Tower 4 BAU1F1 raised to 14'3", crop is approx 9'. About as tall as possible. Reestablished N-S coor on the horizontal bar. 330 PM complete.

GC run on Dawn GC: LTAR, Series 19, 07/23/2026. Two vials submitted out of order - 40 before 39. These were switched to proper order on the GC rack and all vials run sequentially. In addition, there was an issue with LTAR Series 18 being stuck on "acquiring" at the very last standard in it's sequence. This caused an issue with loading the Series 19 run, until the Series 18 was aborted for the last standard, and the run cleared from the Run Queue. I think everything worked out, but there may be no data for that last standard on series 18.

BAU Tower 2 (soybeans) raised to 7ft. Soybeans at tower are at a height of 2 ft. Original tower height was 6 ft. Raised to 7 ft. to be 5 ft above canopy, which is approximately 1.5m difference (between tower sensors and top of canopy).

LTER Series 8 06/26/2026 GC run had some samples submitted out of order. All samples run in sequential order, but these vials submitted out of order (as listed): ...220, 224, 222, 223, 221, 225....

LTAR Series 18, 07/20/2026 GC run. Two samples submitted out of order. All samples run sequentially. Sample vials 80 and 79 were swapped in racks submitted for analysis (i.e. vials ordered ...76, 77, 78, 80, 79, 81....).

flumes ASP3F2 and BAU2F1 flumes are now covered with plywood. Collection Bottles were installed by Drew last week. ASP1F2 and BAU1F1 are complete and covered as well.

Will start installing autosamplers this week and next.

Sort T3, T4 prairie strip ANPP plants -

LTER 11 gas sampling -

LTER Hydrosense -

Sticky traps - Sam, Emily

LTER gas chamber prep - Bella, Jon

Clip T3, T4 prairie strip ANPP - Alyssa, Glori, Bella, Jon, Emily, Sam

Sort T3, T4 prairie strip ANPP plants - Alyssa, Glori, Stacey

LTER gas tote prep - Stacey

WPS - Emily

Tried to sample LTER soil with bucket augers but conditions were very dry and difficult. Decided to postpone soil sampling.

Finished fertilizing N-deposition microplots in DF3 and CF3 - Sam, Emily

Sticky traps - Brian, Jon

Sort T3, T4 prairie strip ANPP plants - Alyssa, Brian, Olivia

Filter T3, T4 T21 soil extracts - Glori, Jon, Emily

LTER gas vial prep - Stacey

removed the logger, tr100, CH150, SDM8x50 and battery from the transitional site at the fence. The logger box and the TDR cables are still in the box. The SDM8x50 wing devices are also still at the site. I did not check what is still in the forest end box at the transitional site.

Fertilize N-deposition microplots in all R1 and R2 plus SFR3 - Sam, Emily

Clip ANPP samples from T3, T4 prairie strips - Brian, Bella, Glori, Alyssa

Weigh T21 soil from T3, T4 stations and strips - Brian, Bella, Glori

BCSE 14 gas sampling - Brian, Alyssa

BCSE Hydrosense - Alyssa

Collect LFLIT from T5 traps, trim under traps - Emily, Glori

Continue clipping T3, T4 R1 prairie strip ANPP - Sam, Jon

Finish pooling T21 soil - Alyssa, Glori, Emily

Sort T3, T4 R1 prairie strip ANPP - Sam, Jon, Brian, Emily, Alyssa, Glori, Stacey

MCSE radio network was blinking and not passing data. I rebooted the base station and it cleared up. Noticed a high volume of watchdog errors on T7R4 due to MQTT being enabled but not used. Disabled MQTT and updated OS on T7R4

BCSE gas vial and tote prep - Stacey

Pool T21 soil bags A and B from T3, T4 stations and prairie strips -

LTAR 20 gas sampling - Alyssa, Glori, Sam, Olivia

LTAR Hydrosense - Emily

BCSE gas chamber prep - Jon

Start cutting T3R1 prairie strip ANPP: Along each EW transect (South, Center, North): 2 x 0.5m frame, 5m south of strip center to center of 2m frame side (north side). Cut T4 corn paths to station flags - Jon, Emily

Collect T21 bags from T3, T4 stations and prairie strips -

Acid washed dishes.

LTAR gas vial and tote prep - Sam, Jon

Measure then filter LTAR leachate, filter LTAR soil extracts, dishes - Glori, Bella, Sam

Sort ASP6 ANPP plants - Stacey, Alyssa, Jon, Emily

Sticky traps - Emily, Brian, Jon

Collect LTAR leachate - Glori, Bella

LTAR gas chamber prep - Sam, Jon

Weigh LTAR soil for extraction and moisture -

Sort ASP6 ANPP plant samples - Stacey, Jon, Sam, Emily, Brian, Bella, Glori, Jordyn

Prepared 1M KCL, prepared standards. Acid washed dishes. Lachat run 2026 July LTER T7 soil (Lau lab).

Exchanged IRGASON for calibrated (by JC lab) around noon today. Also moved our original EC100 box back. Current SN of IRGASON is 100010. Raised the sensor to 62" above canopy and 82" above ground.

Changed out CNR4 cables with DW, reconnected to V116. Check tomorrow.

Finish sampling soil from three LTAR plots that couldn't be finished yesterday due to lightning - Bella

Sticky traps - Sam, Jon

Evacuate LTAR lysimeters -

Finish clipping ASP6 R4 ANPP -

Lachat runs GLBRC soil 20260424 and 20260622.

Removed the rest of the REX sensors and box from T1R2. Also removed the sensors from T2R6. I think that all of the non T7 REX sensors and boxes have been decommisisoned.

LTAR soil sampling for July. Too dry for push corers. Used bucket augers and took one 25cm depth sample from each station. When row crop present/harvested, took one in the row, one half way between rows, and one about a quarter of the way from a row to the next. Sampled noNI microplots the same way. -

ASP6 ANPP sampling; R1-4 all stations: 0.5mS, 0.5mE of each station to the NW corner of 2 x 0.5m frame, oriented with the 0.5m ends on the east and west. Finished sampling R1-3 -

Sieve LTAR soil samples -

Sort ASP6 ANPP -

Sort T8 ANPP - Alyssa, Stacey, Jon

Filter LTER T21 soil extracts - Brian, Jordyn

LTER 10 gas sampling - Brian, Glori, JOn, Jordyn, Sam, Emily (Hydrosense too)

Finish ASP4, 5 flagging stations with REACH - Jon

replaced T7R4 logger with the one from T1R2. The sensors are now all on C3 instead of on C1, C3 and C5. I've adjusted the program to take that into account. Shields not connected to ground. There are 3 sensors installed. (g, f, e). Sensor f does not respond. Since we have only 3 sensors and 4 SDI12 ports I wired each sensor to it's own SDI12 port.

Prepared 1M KCl

Sort T8 ANPP plants - Alyssa, Stacey, Jordyn, Jon, Olivia, Bella, Glori, Sam

Weigh LTER T21 soil samples for moisture and extraction - Brian, Bella

LTER gas vial and tote prep. WPS training - Emily

decommissioned the REX logger box and sensors from T2R1.

LTAR 19 gas sampling - Jordyn, Jon, Sam, Olivia

LTAR Hydrosense - Emily

LTER gas chamber prep - Glori, Emily

Replace LTAR station flags (flagging tape in ASP4,5) with REACH - Sam, Jon

Sticky traps - Emily, Sam

Collect LTER leachate - Jon, Jordyn

LTAR gas chamber prep - Brian, Glori

T8 ANPP sampling. All stations: 1mS, 1mW of each station flag to NE corner of 0.5 x 0.5m frame - Alyssa, Brian, Glori

Measure and filter LTER leachate, dishes - Jon, Jordyn

Start sorting T8 ANPP -

Sort T5 ANPP - Brian, Emily, Jordyn, Olivia, Stacey

Sticky traps - Brian, Jon

Evacuate LTER lysimeters - Glori, Sam

Nitrogen Application Study gas sampling, too dry for Hydrosense - Olivia

Collect three SURFL samples forgotten from T5 understory sampling yesterday - Emily, Jordyn

Collect buried LTER T21 bags - Jon, Sam, Glori, Jordyn, Emily, Olivia

Lachat run LTER Lysimeter 20260402. Notes from run:

• Three vials labeled T3 R3 1, 2, and 3 were ran as T5 R3 1, 2, and 3. Flasks for T3 R3 and T5 R3 were swapped when evacuating samples. Weights were adjusted when entering in data file to the correct location, but vials were sampled incorrectly.

LTAR 18 gas sampling - Glori, Brian, Jordyn, Bella

BCSE 13 gas sampling - Jon, Sam

LTAR, BCSE Hydrosense sampling - Emily

T5 understory ANPP sampling, set LFLIT traps. NS trap… 2.4mN, 1.2mW of station 5 to SE corner of trap, frame oriented with short ends on the north/south; label ex. T5R1 NS EW trap… 2.4mS, 1.2mW of station 3 to NE corner of trap, frame oriented with short ends on the east/west; label ex. T5R1 EW. Collect newly fallen poplar leaves within frame as LFLIT (if any). Clip all biomass rooted inside frame with scissors – as close to the ground as possible. Bag as LIVE to sort in the field lab later (store in black bags in fridge). Use electric trimmers to trim back plants outside the frame to keep them from falling over the frame. Leave the frame in place and lay a screen inside it. Push the screen down inside the frame so it rests on the ground. Use clips (at least 6/trap) to attach the screen to the wooden frame on all sides. - Alyssa, Jon, Emily, Sam, Bella, Glori, Jordyn, Brian

Raised tower 2 (BAU north of pond lab) sensors to 168" (14'). Rest N-S.

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.

Set up a set of six CS650 sensors on a CR800 data logger. All sensors connected to C3 control port. These measure a soil moisture profile. Three sensors in between F5 and F6 on Block 5 1 meter in from the North edge.

Address 1 = 12" depth Irrigated Address 2 = 24" depth irrigated Address 3 = 34" depth irrigated

Also installed three sensors on the rainfed side Block 2 in between F6 and F4, one meter in from the north edge.

Address 4 = 12" depth rainfed Address 5 = 24" depth rainfed Address 6 = 36" depth rainfed.

All sensors installed offset from one another so one sensor does not influence another.

Sven will connect radio and program.

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.

LTER Grad Fellow Symposium

Pack CN - Glori

Data entry - Emily, Jon

LTER field lab to do list (cleaning, organization, dump old samples) - Jordyn, Sam, Brian

Postponed field work, including LTAR 18 and BCSE 13 gas sampling, due to hazardous air quality outdoors from Canadian wildfire smoke.

Reinstalled ASP1 gas chambers after forage baling - Sam

Lachat run LTER Lysimeter 20260319. Notes from run:

• Vial labeled T2 R4 1 should not exist, not enough volume listed. Ran as Vial T3 R4 1, that was not present and should exist.
• Vial T CF R2 1 missing from box, not run (no data notes)
• Vial T6 R3 3 present, should not exist. Not enough volume in vial to run.

The usb to serial pigtail between the rpi and the RF407 radio in the BCSE gas trailer appears to have failed. I replaced it with one from the ICOS system.

Replaced Cadmium Column, acid washed dishes.

Prepared Color Reagent (2 L) 200 ml phosphoric acid 80 gm sulfanilamide, 2.0 gm N-1-naphthylethylenediamine dihydrochloride, Dilute to 2L with Nanopore H2O.

Postponed LTAR 18 and BCSE 13 gas sampling due to hazardous air quality outdoors from Canadian wildfire smoke. No field work today.

Weigh LTAR plants - Jon, Jordyn

Sort ASP1 forage - Emily, Brian, Bella, Jon, Sam, Olivia

Pack CN - Sam, Bella

Dishes, lab clean-up - Jordyn, Glori

NAS vial prep and data entry - Olivia

Rebury some T3, T4 T21 bags for station 5 as they were buried on the foot path in error, so moved further west between foot path and prairie strip.

Collect LTAR leachate - Emily, Brian

LTAR, BCSE gas chamber prep - Jordyn, Glori

Sticky traps - Jon, Sam

Measure and filter LTAR leachate, filter LTER soil extracts, LTAR and BCSE gas vial prep - Jordyn, Glori, Emily, Brian

Sort ASP1 forage - Sam, Jon

Prepared Standards.

Lachat run LTAR Lysimeter 20260616. Notes from run:

• Vial labeled ASP2 R1 N should not exist, not enough volume. Ran as vial ASP2 R2 N, that should exist and is missing.
• Vial ASP6 R2 S was missing from box and should exist, not run.

Evacuate LTAR lysimeters - Olivia, Brian

Finish LTER soil sampling - Emily, Glori, Jon, Jordyn, Sam

Sticky traps - Brian, Olivia, Emily, Jon, Sam

Sieve LTER soil -

Weigh LTER soil for extraction and moisture - Alyssa,

Sort ASP1 forage, empty ovens - Alyssa

Prepared 1M KCl

LTER soil sampling. T1-T5: with bucket auger, took one sample (to 25cm depth) from each station 1, 2, 3, 4 (skip station 5), alternating in the crop row and between T6, T7: with bucket auger, took one sample (to 25cm depth) from each station 1, 3, 4 (skip station 2 and 5). T8 and forest cored normally. Some mainsite samples were initially taken incorrectly, so had to be resampled in the afternoon and not all sampling finished today. - Bella, Emily, Glori, Jon, Jordyn, Sam

ASP1 forage sampling prior to second cutting. Stations 1, 2, 3: 1mS, 0.5mE to NW corner of 2 x 0.5m frame, oriented with the 0.5m ends on the east and west. Kept in field lab fridge until sorting to MEDSA, TRFPR, CICSP, DACGL, BRSNA (live volunteer canola), remainder label UNSRT. - Bella, Emily, Glori, Jon, Jordyn, Sam

removed ground sensors for forage harvest. ASP1F1 Found one 107 and one heat flux plate chewed and broken. Need to reapir.

LTER 9 gas and Hydrosense - Sam, Jon, Brian, Jordyn, Glori, Emily

Cut LTER corn paths - Brian, Sam, Glori

LTER gas chamber prep - Sam, Jon

LTAR 17 gas sampling and Hydrosense - Jordyn, Brian, Glori, Alyssa, Emily

Nitrogen Application Study gas and Hydrosense - Olivia

Bury T21 bags in T3, T4 stations and strips. Bury whirl-paks in their corresponding plot and station/strip. Stations: Measure or pace ~3m in a SW direction from each station flag. At that point, place a meterstick perpendicular to the tape measure at the 50cm mark on the meterstick. Bury T21 A at one end and T21 B at the opposite end. Bury both bags within a corn row as much as possible, so not disturbed during cultivation, etc. So, bags actually buried further than 1m apart. Strip: At the approximate center of the strip on the north end of the plot, measure or pace ~10m south into the strip. At that point, place a meterstick perpendicular to the tape measure at the 50cm mark on the meterstick. Bury T21 A at one end and T21 B at the opposite end. Each bag gets buried over an orange garden marker at about a 45-degree angle with the top of the bag about 1” below the surface and the marker sticking out of the ground only about 1-2”. For removal in 21 days - someone can pull up on the orange marker to easily remove the bags. For burial, use a trowel or narrow shovel to lift the soil, place the marker and bag, and then remove the trowel and press down the soil to ensure contact with the buried bag. A flag is placed at the 50cm point or midway between the buried bags, also within a corn row, to help locate them later. Flagging tape can be added in the prairie strips as well, to help with locating the bags later. - Emily, Brian, Jordyn, Sam, Glori, Jon

Make new LTER gas vials; all previous vials are awaiting analysis due to troubles with the old GC and switch over to a new GC - Alyssa, Olivia

LTAR gas chamber prep - Jon, Brian, Emily, Glori, Sam, Jordyn

Sticky traps - Jon, Brian, Sam

BCSE 12 gas sampling, Hydrosense - Emily, Glori

Collect LTER leachate - Sam, Jordyn

Measure and filter LTER leachate - Sam, Jordyn, Glori

Reshake then filter LTER T3, T4 soil extracts - Emily, Brian

Prep LTAR gas vials, totes - Jordyn, Glori

Weigh T3, T4 soil for extraction, moisture and T21 whirlpaks (90-100g/whirlpak) - Olivia, Brian, Jordyn

BCSE gas tote prep, dishes - Jordyn, Brian

LTAR Moved IRGASON from tower 3 to tower 4 after calibration. Removed 1375 for calibration and will move to tower 1. SN1421 now on tower 4. Did this around 11:30. Raised sensors to 11'.

Sticky traps - Sam, Emily

Prep BCSE gas chambers, evacuate LTER lysimeters - Jon, Glori

Nitrogen Application Study gas and Hydrosense sampling - Olivia

Cut MCSE corn paths - Olivia, Sam, Emily

Help Nameer and others raise the height of LTER Resource Gradient rainout shelters - Jon, Glori

LTER T3, T4 station and strip soil sampling. Four cores/station, two in the corn row and two between rows. Keep stations separate. Four cores spread across the prairie strip avoiding sampled areas, like gas chambers, sticky traps, and pit fall traps, and foot paths. - Brian, Sam, Jon, Glori

ASP5 canola sampling. R1-4, all stations: 0.66mS, 0.66mE to NW corner of 1.52 x 0.66m frame, oriented with the 0.66m ends on the east and west. 1.52m side perpendicular to canola rows. - Emily, Bella, Brian, Sam, Jon, Glori, Jordyn

Cut paths through LTER corn - Jon, Emily, Sam, Bella

Dishes - Jordyn

BCSE new vial prep - Glori

Field lab clean-up - Brian

Installed sensors in irrigated control REX plots. T7, R1,3,4,5,6. Looking for replacement for R2.

LTAR 16 gas sampling and Hydrosense - Bella, Glori, Sam, Brian, Emily

NAS gas and Hydrosense sampling - Olivia

Install T3 tall flags and T-posts - Jon, Jordyn

Cut T1, T2 corn paths - Emily, Olivia, Jon, Bella, Brian, Stacey

Dishes - Jordyn

Measure and filter LTAR leachate - Sam, Glori

Filter LTER soil extracts - Jordyn, Jon

LTAR gas chamber prep - Brian, Jon, Sam

Sticky traps - Brian, Emily

Collect LTAR leachate - Sam, Jon

BCSE 11 gas sampling and Hydrosense - Emily, Glori

Moved Anna autosampler to BenGc and reconfigured the system and tray. Found that the method was not detecting the "waste" inlet for the licor. Also, the tray is not perfectly realigned even after retraining. Looking into the problem. Running the remainder of Blesh lab run (1st part on Anna GC).

New 8890 GC installed by Rick Bailey yesterday. Completely different software than the 7890.

Also, repaired valve on BenGC. Rick brought the part, I changed it. The Gerstel switch from BenGC may be bad so traded with Anna GC switch.

Weigh LTER soil for extraction, moisture and T21 incubation - Glori, Jordyn, Brian around 11

BCSE and LTAR gas vial prep - Jordyn

Checked heat flux plates on tower one and two. Seem to be installed properly but values of one on each tower say otherwise. Need to ensure multiplier is correct.

Yesterday afternoon Moriz from JC lab swapped out the IRGASON on tower 2. Calibrated last night and we will install on tower three today. Tower 2 Irgason SN now 2482 (formerly tower 1).

BCSE gas chamber prep, then evacuate LTAR lysimeters - Emily, Brian

Sticky traps - Jon, Sam, Emily

Bury T21 soil bags. Bury whirl-paks in their corresponding plot. Measure or pace ~7m in a NE direction from the SW corner of each plot. At that point, place a meterstick perpendicular to the tape measure at the 50cm mark on the meterstick. Bury T21 A at one end and T21 B at the opposite end. In corn and poplar plots, the spacing should be adjusted to ensure both bags are buried within a row of wheat or poplars. Each bag gets buried over an orange garden marker at about a 45-degree angle with the top of the bag about 1” below the surface and the marker sticking out of the ground 1-2”. For removal in 21 days - someone can pull up on the orange marker to easily remove the bags. For burial, use a trowel or narrow shovel to lift the soil, place the marker and bag, and then remove the trowel and press down the soil to ensure contact with the buried bag. Try to disturb the plants as little as possible. A flag is placed at the 50cm point midway between the buried bags to help in locating them later. In T1-4 the flag should be in a corn row between the buried bags with all bags and flags within a row of corn. Wherever helpful, tie flagging tape on a plant above the flag, so it is easily located for collection.

• Emily, Brian, Jon, Sam, Glori, Stacey

LTER soil sampling - Bella, Brian, Emily, Glori, Jon, Jordyn, Sam

Pull and replace T4 T posts during cultivation - Sam, Jon

Pull T3 T-posts for herbicide - Emily, Sam

Sample ASP4 R1-3 wheat; all stations: 0.5mS, 0.5mE to NW corner of 2 x 0.5m frame. Clipped and counted wheat stems, recorded on bag. Sample mature weeds and cover crop, if present. - Jon, Brian, Bella, Glori

Sieve LTER soil - Sam, Emily

Prepared Standards. Lachat run LTAR Lysimeter 20260602.

LTER Series 8 gas sampling - Brian, Bella, Jordyn, Olivia, Sam, Jon, Glori, Emily (Hydrosense)

Finish G8 plant sampling - Jon, Glori

Replace short station flags with tall in T1, cut station paths through the corn with a machete in T1R1, T2R1, T1R2 - Stacey

Nitrogen Application Study gas and Hydrosense sampling - Olivia

Finish prepping LTER gas vials and totes - Brian, Bella, Jordyn, Olivia, Sam

Prep more NAS gas vials - Olivia

GHG talk from Kevin - Alyssa, Bella, Brian, Emily, Glori, Jon, Jordyn, Sam

Added CS650 Sensors to the resource gradient to track VWC at 12", 24", and 36" in the irrigated block 5 between F5 and F6 (north end of plots 1 meter in). and rainfed block 2 between F6 and F4. Addresses 1=12" irrigated, 2=24" irrigated, 3=36" irrigated. 4=12" raidfed, 5=24" depth rainfed, and 6= 36" rainfed. During installation we used a 16" auger to make a hole large enough to be able to install the CS650s. staggered the install around the hole so no sensor overlapped another. Install in fresh soil at the circumference.

Ditchwitch trench from both locations back to the northeast corner of the grassy area where the trailer was housed.

LTAR Series 15 gas sampling - Jordyn, Bella, Glori, Brian, Emily (Hydrosense)

LTER gas chamber prep - Sam, Jon

Replace G8 station flags, G8 plant species composition (Three NS transects per plot, main only. Each transect ~1m east of the station flags and numbered 1-3 based on the station number.) - Alyssa, Emily, Brian

G8 understory plant sampling ahead of herbicide/mowing. Location for each station: 2mS, 2mW of each station flag to the NE corner of 2 x 0.5m frame. All clipped bagged as UNSRT, then collected surface litter. - Jordyn, Glori, Bella, Emily, Sam, Jon

Weigh and filter LTER leachate - Olivia, Jordyn

Filter LTAR and BCSE soil extracts - Glori, Brian

Sticky traps (replace T6, T2) - Emily, Jon, Sam

Collect LTER leachate - Olivia, Jordyn

BCSE Series 10 gas - Sam, Glori, Emily (Hydrosense)

LTAR gas chamber prep - Emily

Reinstall chambers 11am following application of treatments (surface (south half) and 6" deep nitrogen (north half). Nitrogen Application Study gas and Hydrosense sampling around 3pm - Olivia

Reconditioned Cadmium Column.

Finished dilutions from LTAR Lysimeter 20260519 run.

Sticky traps (pull T6 for herbicide and T2 fertilizer) - Sam, Emily,

Evacuate LTER lysimeters - Jon, Brian

Put tall flags into G1, G3, ASP2 -

BCSE gas chamber prep - Jon, Brian

Prepared 1M KCL.

Prepared Ammonium Chloride Reagent (4L): 320 gms Ammonium Chloride 4.0 gms EDTA pH to 8.45 with NaOH, store

Lachat run LTAR Lysimeter 20260519. Notes from run:

• Samples ASP1 R4 C, S, and ASP3 R3 C were not present, not analyzed.

Tower 4 (BAU1 north of pond lab) raised IRGASON to 1.75 m above avg canopy.

Installed 107/solar shield on rain gage vertical bar, but will remove, too close to tipping bucket. Also need proper connector.

Calibration of tower 1.

Removed GPR owned sensor SN2482 CSI for recalibration, installed JC instrument temporarily.

Weigh LTAR and BCSE soil for extraction and moisture - Glori, Jordyn

BCSE gas vial, tote prep - Glori

Grind LTAR plants - Brian

Pack CN - Jordyn

Acid washed dishes. Lachat run LTAR Lysimeter 20260505. Notes from run:

• Samples ASP3 R1 N and C were dumped before filtering, not run.

LTAR and BCSE (G1-5 one-week post side-dress in G1) soil sampling - Bella, Brian, Emily, Jon, Jordyn, Sam

Grind plants - Glori, Sam

Sieve LTAR and BCSE soil -

Pack CN - Olivia

Archive LTER air-dried soil -

Prepared Color Reagent (2 L) 200 ml phosphoric acid 80 gm sulfanilamide, 2.0 gm N-1-naphthylethylenediamine dihydrochloride, Dilute to 2L with Nanopure H2O.

Lachat run LTAR Lysimeter 20260421.