Installed G1-3 (except G1R2 and G1R3, those two chambers were accidentally left in during herbicide application on 5/29) chambers just prior to gas sampling BCSE 7 -

BCSE 7 gas sampling -

Collect LTAR leachate -

Evacuate LTAR lysimeters - Brian, Sarah

LTAR 11 gas sampling - Sam, Slater, Jon, Andie (Hydrosense)

ASP2 forage sampling ahead of harvest, Stations 1, 2, 3: 0.5mS, 0.5mW to NE corner of 2 x 0.5m frame, oriented with the 0.5m ends on the east and west. Clip all plants rooted inside the frame as close to the ground as possible without collecting litter or soil. Sorted later in the field lab…MEDSA, TRFPR, CICSP, DACGL, BRSNA, remainder label UNSRT - Sam, Slater, Brian, Jon

Sticky traps - Sam, Slater, Brian, Jon

LTAR gas chamber prep - Alyssa, Sarah, Jon

LTER T3, T4 station (4 cores/station, 2 in the wheat row and 2 between wheat rows) and strip (4 cores spread across each strip avoiding transects, foot paths, traps and gas chambers) soil sampling - Sarah, Andie,

Sticky traps (first check for T3, T4, prairie strips; reinstallation for T1, T2 as they were pulled for fungicide over the weekend) - Slater, Brian, Jon, Sam

LTER 6 gas sampling - Olivia, Brian, Trajana, Sarah, Jon, Slater, Andie, Sam

LTER Hydrosense - Trajana

BCSE 6 gas sampling - Brian, Andie, Slater (soil, 3 cores/plot)

LTAR 10 gas sampling - Sarah, Jon, Sam

BCSE and LTAR Hydrosense - Trajana

LTER gas chamber prep -

Collect LTER leachate - Olivia, Brian, Jon, Sarah

BCSE and LTAR gas chamber prep - Slater, Sam, Trajana, Andie

Sticky traps (first cards deployed in T5-7 and forest plots) - Sam, Slater, Brian, Jon

Evacuate LTER lysimeters - Trajana w/Jon, Andie w/Sarah

Sticky traps (deploy first sticky cards in T1-4 and prairie strips) - Sam, Slater, Brian, Jon

LTER soil sampling, 2nd May -

Swap and mail first aphid tower sample - Stacey

Finish installing MCSE T-posts - Sam, Slater, Brian, Jon

Finish dumping soil - Olivia, Trajana

Finish installing LTAR station flags - Andie, Sarah

LTAR 9 gas sampling - Alyssa (train Sarah, Jon), Andie, Slater

LTAR Hydrosense - Trajana

Finish M3 switchgrass stand counts - Alyssa, Sarah

Deploy MCSE T-posts - Sam, Slater, Brian, Jon

Collect LTAR leachate - Alyssa, Jon, Sarah, Slater

BCSE 5 gas sampling - Olivia, Sam

BCSE Hydrosense - Trajana (trained by Stacey, Dave)

LTAR gas chamber prep - Brian

Install BCSE G1 station flags, prep BCSE gas chambers - Brian

Evacuate LTAR lysimeters - Alyssa (training Jon and Sarah), Slater

Switchgrass stand counts (L2, M3) - Alyssa, Sarah, Jon

Start installing T-posts in MCSE plots for sticky card deployment starting 5/20/2025 - Slater, Brian

First day for Sarah Ru and Jon Di

LTAR station flag installation - Alyssa, Trajana

LTAR soil sampling - Slater, Olivia, Brian, Sam

Switchgrass stand counts (T6, L2). T6 and Scale-up (L2, M3) were the same as BCSE G4, G5… using 75 x 75 cm frame split into 25 cells (5x5) each measuring 15cm x 15cm. Started approximately 1m N and 1m W of each station, placed the frame on the ground and counted each cell that had switchgrass growing inside it. Then the frame was flipped to the north and switchgrass cells counted three more times. So, 100 cells were evaluated in total at each station. The GPS was used to navigate to the Scale-up station locations since the flags weren’t installed. - Alyssa, Sarah, Jon

Dump soil - Sam, Brian

Dave and I lowered the tower boom between 14:00 and 14:30. Dave aligned the CO2 sensor and I installed the rain gauge and the soil sensors. I put the heatflux plates about 1 cm below the surface with the dot facing up, the soil moisture and temperature probes vertically. I’m not sure if the soil temperature probes are supposed to be vertical or horizontal. Planting was nice and close to the tower.

LTER 5 gas sampling - Alyssa, Sam, Slater, Brian, Olivia

LTER Hydrosense - Alyssa

Dump soil -

LTAR 8 gas sampling - Sam, Slater, Brian

LTAR Hydrosense - Alyssa

Switchgrass stand counts (SWF) - Alyssa, Trajana

Dump soil -

REX probe K on T7R4 was shorted to ground. I disconnected the probe. Probe addresses were not on the SDI12 ports that the program was expecting. I updated the program to match the sdi12 port connections. Probe i had the power wire tied in a knot which i often do when I want to mark a probe as bad, but I reconnected probe i and it appears to work.

Collect LTER leachate - Sam, Slater

Prep LTAR and LTER gas chambers - Olivia, Trajana

Continue switchgrass stand counts (finished G5, started SWF). For the switchgrass gradient: frame was placed about 1mN and 1mW of the southeast plot corner for both the former H1 and H2 plot halves. Switchgrass cells were counted and then the frame filpped once to the north. So, each plot had 100 cells evaluated… 50 in former H1, 50 in former H2. - Alyssa, Brian

Evacuate LTER lysimeters - Trajana, Sam

LTER 1st May soil sampling - Alyssa, Sam, Slater, Trajana, Andie

Replace T8 station flags - Olivia, Brian

Help Poulamee and Maxwell from the Kravchenko lab sample BCSE soil for MONet - Brian, Olivia

Start switchgrass stand counts in BCSE G4, G5 main plots only, using 75 x 75 cm frame split into 25 cells (5x5) each measuring 15cm x 15cm. Started approximately 1m N and 1m W of each station, placed the frame on the ground and counted each cell that had switchgrass growing inside it. Then the frame was flipped to the north and switchgrass cells counted three more times. So, 100 cells were evaluated in total at each station. - Alyssa,

Install T6 station flags - Sam, Slater

Finish trimming and marking LTER forest paths - Olivia, Trajana, Slater, Sam

Pull T8 flags and frames for mowing - Andie, Brian

Dump BCSE biomass on the burn pile - Slater, Sam

BCSE Series 4 gas sampling with soil sampling (pre-fertilization, one 0-25cm core per station, where applicable one was taken in the previous crop row, one half way between rows and one half way between those two), in error some plots (G1R1, G2R1, G2R2, G3R1, G3R3, G4R1, G4R2, G4R3, G5R1, G5R3) were sampled three cores per station instead of three total per plot. - Andie, Olivia, Brian (soil)

LTAR Series 7 gas sampling - Slater, Trajana, Sam

BCSE and LTAR Hydrosense - Alyssa

BCSE and LTAR gas chamber prep - Alyssa, Brian

Finish forest N-deposition fertilization (SF2, DF3, CF3) - Trajana, Olivia

Collect LTAR leachate - Slater, Sam

Sample ASP3 and ASP4 plants ahead of herbicide. Both: Stations 1, 2, 3: 0.5mS, 0.5mW to NE corner of 2 x 0.5m frame, oriented with the 0.5m ends on the east and west. Clip all plants rooted inside the frame as close to the ground as possible. Avoid collecting litter, soil and especially compost in ASP3. Sorted in field lab later… ASP3: MEDSA, TRFPR, CICSP, LOLMU, and UNSRT. ASP4 was sorted in the field: SECCE, CAMSA (Camelina sativa, winter camelina, none found) and UNSRT. In addition ASP4R5 was sampled for the first time by placing the frame approximately in the center of each half of the plot (east and west halves), with the frame perpendicular to the rye grass row. Samples labeled ASP4R5 W and E. - Alyssa, Brian, Trajana, Olivia, Slater, Sam

Help Poulamee and Maxwell from the Kravchenko lab sample BCSE soil for MONet - Brian, Olivia

Fertilize N-deposition microplots (CF1, DF1, SF1, DF2, CF2, SF3). Using Urea (46% N), first of three applications for 2025. 1F (all except CF3): 1gN/m2 applied to 10×10m plot, equal to 217g Urea divided into three applications of 72.5g (spring, summer, fall) each mixed with 4L water 1F-CF3: 1gN/m2 applied to 2×3m plot, equal to 13g Urea divided into three applications of 4.3g each mixed with 2L water 3F: 3gN/m2 applied to 2×2m plot, equal to 26.1g Urea divided into three applications of 8.7g each mixed with 2L water 10F (in DF only): 10gN/m2 applied to 2×2m plot equal to 87g Urea divided into three applications of 29g each mixed with 2L water. Accidentally mixed CF1-3F and DF1-3F into 4L of solution instead of 2L, so received the right amount of fertilizer but twice as much water. - Slater, Andie

Evacuate LTAR lysimeters - Sam, Trajana

LTER Series 4 gas sampling - Slater, Trajana, Brian, Andie, Olivia

LTER Hydrosense - Alyssa

LTAR Series 6 gas sampling (BAU1 R1 was installed just prior to sampling - was missed during prep); ASP3 microplot chambers were installed by the Blesh lab 4/23 since they are sharing those chambers, were installing their other chambers and techs had forgotten to install those. An error was made in sampling ASP3 microplots due to confusion with the Blesh lab chambers in the neighboring microplots in ASP3. ASP3 R2 and R4 no compost microplots were sampled correctly. ASP3 R1 and R3 Blesh lab microplot chambers in the next microplot to the east were accidently sampled. - Slater, Olivia, Stacey

LTAR Hydrosense - Alyssa

Install LTER T1, 2, 6 gas chambers - Slater, Trajana, Brian

LTER 2nd April soil sampling - Alyssa, Slater, Brian, Trajana, Andie

Install ASP1 and ASP5 chambers -

Help Mark move OTCs - Brian, Slater

Collect LTER leachate - Olivia, Slater

LTAR and LTER gas chamber prep; pulled ASP1 and ASP5 chambers, installed BAU1 and ASP3 main, forgot to install ASP3 microplot chambers - Brian, Trajana

Evacuate LTER lysimeters - Brian, Olivia

Install T6R1-6S5 flags for Jin Ho to sample soil - Brian

Install ASP6 flags -

LTAR 5 gas sampling - Slater, Trajana, Olivia

LTAR Hydrosense - Alyssa

Collect LTAR leachate - Andie, Trajana

BCSE 3 gas sampling - Slater, Brian

BCSE Hydrosense - Alyssa

Evacuate LTAR lysimeters, prep BCSE and LTAR gas chambers - Olivia, Brian

LTAR April soil sampling, first sampling to include new R5 plots - Alyssa, Slater, Brian, Trajana

Added CS650 sensors to T7r3,4,2,6 (did T7 r1,5 2 weeks ago). Added positions to Survey 123 and hard copy map.

LTER Gas Series 3 - All + hydrosense (Alyssa, Andie) (Forest set DF2, CF2, SF3 split and sampled by two people due to issue with golf cart)

Dishes - Brian

All chambers and bases are removed from BCSE G1 and 5. Compressor shut down in December for last measurements. Keeping both analyzers running to keep stable. Waiting for electric at LTAR R5 to move system.

LTAR Gas Series 4 - Trajana, Slater, Brian + Hydrosense (Alyssa)

Finish LTER gas frame prep - Alyssa

Collect LTER Lysimeters - Slater, Andie

Prep LTAR, LTER gas frames - Brian, Trajana

Evacuate LTER Lysimeters - Brian, Trajana

Finish sieving LTER soil - Slater

LTER Soil sampling - Alyssa, Brian, Slater, Trajana

LTAR Series 3 gas sampling - Slater, Andie, Alyssa (+Hydrosense), Olivia

Collect LTAR leachate from 4/1 evacuation - Slater, Andie, Alyssa, Olivia

Collection of LTAR leachate had to be delayed until 4/3 due to all day heavy rain and storms.

Evacuate LTAR lysimeters; LTAR gas chamber prep - Slater, Andie

BCSE Series 2 gas sampling - Slater, Andie (Hydrosense too)

BCSE gas chamber prep -

LTER 2 gas sampling (first full set for 2025), prairie strips had to be sampled in the afternoon - Slater, Brian, Trajana, Olivia

LTER Hydrosense; Pull LTAR ASP1, ASP5, ASP6 frames for fertilizer and mowing - Alyssa

LTAR 2 gas sampling - Slater, Brian, Trajana

LTAR Hydrosense - Alyssa

Sampled soil from new LTAR R5 plots, twelve 0-25cm cores per plot pooled, six from the north half and six from the south half, approx. evenly space across the plot EW; when a row crop was present alternated taking a core in the row and between rows - Stacey

Prep LTAR and LTER gas chambers, install T7 and T7 microplot chambers - Slater, Trajana

First 2025 LTER soil sampling, two 0-25cm cores NE of each station, did not sample T6 since flags had been pulled and switchgrass is still not harvested - Alyssa, Slater, Brian, Trajana, Andie

Replace T7 station flags, fix all other LTER, BCSE, LTAR station flags that were leaning or fallen -

Collect LTAR leachate - Brian, Trajana

Evacuate LTAR lysimeters -

First LTAR soil sampling for 2025, two 0-25cm cores per station (NE of station) - Alyssa, Slater, Trajana, Brian

LTAR Series 1 gas sampling - Slater, Brian, Olivia

LTAR Hydrosense - Alyssa

LTAR gas chamber prep, pull ASP4 microplot chambers and install in ASP3 microplots, sample ASP6 biomass to approximate what could be harvested… from each station, 1.5mN, 0mW to SE corner of 2 x 0.5m frame, plants cut at 6 inches above the ground with electric trimmers, bagged as UNSRT, if plants were lodged or lying down - they were not stood up for cutting. - Slater, Brian, Andie, Trajana

Collect LTER leachate - Slater, Brian

Pull T7 flags and gas frames for burning - Olivia, Trajana

Burn all T7 plots - Kevin, Sven, Dave, Stacey, Alyssa, Olivia, Trajana, Brian, Slater, plus several others (about 16 total)

Evacuate LTER lysimeters (first for 2025) - Slater, Trajana, Brian, Andie

BCSE Series 1 gas sampling - Brian, Slater

Hydrosense in LTER and BCSE - Kevin trained Alyssa (MCSE and BCSE) and Stacey (DF)

Evacuated LTER lysimeters that were installed in fall 2024 since conditions were very dry many did not yield leachate in November or December 2024. These lysimeters were evacuated on 3/7/2025 and left over the weekend. The lids were completely off from DF3-1 and DF3-6. On 3/11/2025 they were checked for pressure, the volume of leachate approximated and then the leachate dumped before re-evacuating with the regular sampling. - Stacey

Lysimeter, pressure, volume from 3/11/2025; CF1-1, N, 0; CF1-3, N, 0; CF1-6, N, 0; CF2-1, N, 20; CF2-3, Y, 300; CF2-6, Y, 200; SF3-1, Y, 600; SF3-3, Y, 450; SF3-6, Y, 200; DF3-1, Y, 350; DF3-3, Y, not recorded; DF3-6, N, not recorded; CF3-1, Y, 50; CF3-3, N, 50; CF3-6, Y, 200

LTER Series 1 gas sampling (last winter sampling) - Slater, Olivia, Trajana

Collect LTAR leachate - Slater, Olivia, Brian, Trajana

Evacuate LTAR lysimeters (first for 2025), ASP6R4/ASP2R4 box was frozen shut and couldn’t be opened, so those lysimeters were evacuated on 3/4/2025 and collected 3/5/2025. - Slater, Brian, Andie, Trajana

Dump 2024 LTER leftover plants and 2023 soil samples - Brian, Slater

Finish measuring trees - Slater, Trajana, Andie

Measure CF3 trees - Slater, Trajana

LTAR Series 30 gas sampling - Brian, Trajana, Olivia

Check LTAR gas chambers ahead of 2/11 sampling -

Measure trees (CF, DF) - Slater, Brian, Trajana

BCSE Series 20 gas sampling - Brian, Slater

LTER Series 16 gas sampling - Trajana, Slater, Brian, Olivia

Measure trees (CF, DF) - Alyssa, Slater, Trajana, Andie

Measure trees (CF, DF) - Slater, Brian, Trajana, Olivia

Measure trees (CF, DF) - Alyssa, Slater, Brian, Trajana, Andie

Measure trees (CF, DF) - Alyssa, Slater, Brian, Trajana, Olivia

Measure trees - Slater, Brian, Andie, Trajana

LTAR Series 29 gas sampling - Andie, Olivia, Brian

LTER Series 15 gas sampling - Andie, Trajana, Brian, Olivia

Measure trees in CF1 - Alyssa, Slater, Andie, Trajana

BCSE Series 19 gas sampling - Trajana, Slater

Final forest leaf litter collection, collected screens, bungees, and clips, flipped over traps - Brian, Slater

LTAR December soil sampling - Slater, Brian, Andie, Mae

LTER lysimeter leachate collection - Andie, Slater

LTAR 28 gas sampling - Olivia, Mae, Brian, Andie (Hydrosense)

Evacuate LTER lysimeters - Alyssa, Olivia, Brian, Mae

LTAR gas chamber prep - Andie, Trajana

Measure T5 poplars - Andie, Trajana, Brian, Mae

Scale-up soil sampling in switchgrass (L2, M3) - Todd, Chris?

Collect LTAR leachate - Mae, Trajana

LTER Series 14 gas sampling, first for winter so no T7 microplots, T8, prairie strips, CF or SF - Brian, Slater, Olivia

Collect leaf litter from CF, DF, SF traps - Mae, Trajana, Brian, Slater, Olivia

Bases installed on Lux Prairie and holes augered on Lux corn (base placement tomorrow). KK, DW, ER, JR.

Evacuate LTAR lysimeters - Brian, Trajana

LTER gas chamber prep for first winter sampling - Slater, Mae

LTER Hydrosense for Series 14 - Andie

Measure poplar trees in G8, random subset of 10 trees per plot - Brian, Andie

BCSE Hydrosense for Series 18 - Andie

BCSE Series 18 gas sampling (Hydrosense tomorrow) - Brian, Trajana

GLBRC Scale-up soil sampling (all but L2, M3 switchgrass plots), ten cores per station, stations kept separate - Todd, Chris

Collect leaf litter from traps in T5, G8 and remove those traps from the fields and put them into storage; Collect leaf litter from CF, DF, SF traps -

Collect LTAR leachate -

LTER Resource Gradient soil sampling, 4 cores per plot (2 within and 2 between winter wheat rows), avoiding edges, sampled at Phil’s request for CN only -

LTAR Series 27 gas sampling -

Evacuate LTAR lysimeters -

Install GLBRC Scale-up station flags in L1, M1, L3, M2 (not switchgrass) -

LTAR gas chamber prep - Trajana, Mae

Fill SWF deep core holes - Brian, Andie, Stacey

Moved sensors on T7_R2 REX to the switched power SW1 and increased the cycle time to 10 minutes in order to try to reduce the battery drain as we go into the winter.

Finish threshing LTAR canola (soybeans and wheat finished yesterday), then shell and shred LTAR corn - Olivia, Trajana, with Josh Dykstra

Shell and shred G1 corn - Slater, Mae, with Ethan and Jarrod

LTAR November soil sampling (3 0-25cm cores per station, for extraction, moisture, A&L S1 analysis, and archive) - Alyssa, Andie, Brian, Mae, Slater, Trajana

Replace BAU1, BAU2 station flags - Slater, Trajana

Thresh LTAR soybean, wheat - Brian, Andie with Josh Dykstra

Thresh LTER REX and BCSE soybeans - Alyssa, Mae with Ethan and Jarrod

LTER Post-harvest Extensive Grid soil sampling. Cores (0-25cm) taken in 5 East/West transects (avoiding sampling in the station flag walkways) using station flags as approximate guides for transects. 4 cores taken from each transect, 20 total cores per plot composited in 1 bag. T1-5 sampled. T5 was sampled using station flag locations in adjacent plots, not the condensed set-up present there. T6 is typically sampled but those plots haven’t been harvested. T6 sampling will come after harvest. - Alyssa, Brian, Slater, Trajana, Mae

Collect leaf litter from T5, G8, and forest traps - Brian, Slater, Andie

Collect LTAR leachate - Trajana, Mae, Emily, Olivia