Projectlog Entries List

Reinstall ASP2, ASP3 and BAU2 gas chambers right before sampling. LTAR Series 9 gas sampling - Brian, Jon, Olivia, Sam

LTAR Hydrosense - Emily

Install T-posts in T5-7 (1.5m NE of each station, to avoid NW where soil will be sampled in 2026) and prairie strips (1m N of Haddad lab transect flags in center of prairie strips) - Emily, Olivia, Sam, Jon, Brian

Tower 1 (Eddy Covariance tower) on LTAR ASP3 F1 scale-up was adjusted for farm management (planting). At approximately 9:30am, tower was raised to 12’7” height, and all sensors brought in. At approximately 3:45pm, tower was lowered back to ~2m height and all sensors re-deployed.

LTER Series 5 gas sampling - Alyssa trained Glori and Bella in the morning and they split up to sample the forest with others in the afternoon, Jon, Emily, Sam, Brian

LTER Hydrosense - Emily

LTER gas chamber prep - Emily, Olivia

Collect LTER leachate - Jon, Glori, Sam

LTAR gas chamber prep most, pull ASP2, ASP3; pull G4, G5 chambers too - Brian, Olivia

LTER lysimeter evacuation - Brian, Emily

Replace T1 S4 and S5 - Stacey

Finish M3 switchgrass stand counts - Alyssa,

Dump plant samples - Emily, Glori

LTER soil sampling - Alyssa, Emily, Brian, Jon, Sam, Bella and Glori (their first days accompanied Alyssa)

Start M3 switchgrass stand counts - Alyssa, Glori

Tower 4 (Eddy Covariance) on LTAR BAU1 F1 was adjusted for farm management. At ~9:00 am tower was raised to 12’6” height and all sensors removed from deployment. At ~3:30pm tower was lowered to ~2m height and all sensors re-deployed.

LTAR Series 8 gas sampling - Alyssa, Emily, Brian, Jon; Hydrosense - Emily

Pull BAU1, ASP2 gas chambers, plus BAU1 flags after gas sampling for soil finishing and planting corn - Jon, Brian, Emily

BCSE Series 4 gas sampling - Jon, Brian; Hydrosense - Emily

Scale-up Lux Switchgrass stand counts - Alyssa, Olivia, Jon

Finish T4 cover crop sampling - Stacey, Emily, Brian

Reinstall ASP2, ASP3 AND BAU2 gas chambers - Alyssa, Jon

Collect LTAR leachate - Brian, Jon

Prep BCSE, LTAR gas chambers; pull ASP2, ASP3, BAU1, BAU2 chambers for farming. - Sam

Finish T6 switchgrass stand counts - Alyssa, Emily, Sam

Continue T4 cover crop sampling - Jon, Brian

Switchgrass stand counts, start T6 with same frame placement as G4, G5 - Alyssa, Jon

Evacuate LTAR lysimeters - Emily, Olivia

T4 cover crop sampling (same as T3) - Emily, Sam, Brian

Finish T3 cover crop sampling - Alyssa, Brian, Jon, Emily, Sam, Stacey

Reinstall ASP2 and ASP5 gas chambers right before sampling. LTAR Series 7 gas sampling - Alyssa, Emily, Jon, Brian

LTAR Hydrosense - Emily

Switchgrass stand counts… finish SWF - Alyssa, Brian

LTER Series 4 gas sampling - Alyssa, Emily, Jon, Brian, Stacey

LTER Hydrosense - Alyssa

Collect LTER leachate - Jon, Brian

Prep LTER and LTAR gas chambers, except pull ASP2 and ASP5 chambers for herbicide. - Sarah, Emily

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 - Jon, Emily

Start switchgrass stand counts in G4, G5. Using 75 x 75 cm frame split into 25 cells (5x5) each measuring 15cm x 15cm. Started approximately 1m S and 1m E 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 south and switchgrass cells counted three more times. So, 100 cells were evaluated in total at each station. - Alyssa, Emily

Started T3 cover crop sampling, finished R1. Used 2 x 0.5 m frame. All stations: 2mS, 2mE of each station to NW corner of frame, 0.5m ends to the east and west. Clipped everything growing inside frame and separated in the field to red clover, TRFPR and UNSRT. - Jon, Brian

After yesterdays rainfall, we will adjust the soil at the ASP3 flume. Bentonite swelled making the area uneven.

LTAR BAU2 F1 and ASP3 F2 now equipped with erosion/overland flow H style flumes at agreed upon locations (Kevin Kahmark, Brook Wilke, Subahsis Giri).

Kevin Kahmark and David Weed installed a large flume at BAU2 F1 at the southern edge drainage point. We extended wooden walls out and to the east and west 12’ on each side using 2x8 and 2x6 treated lumber and 4x4 vertical posts cut to three foot lengths. We graded the surrounding surface and added Benseal sodium bentonite and the flume front and the wall front sides receiving the surface flow. We extended the wall at least thirty feet with a silt fence. We also used Benseal/soil mixture along the fence.

The flume was leveled N-S and E-W at each site.

The ASP3F2 flume is a 1’ flume, slightly smaller than the BAU2F1 flume. We again selected a landscape position that has the best shot at collecting erosion water from the field. We positioned the flume near the SW corner in an area that looked like it was slightly channelized. Same agreement. The side walls were extended ten feet on the north and six feet to the south of the flume. The same bentonite seal used as previous.

LTAR April soil sampling - Alyssa, Sarah, Brian, Emily, Jon

ASP2 plant sampling. Stations 1, 2, 3: 0.5mS, 0.5mE to NW corner of 2 x 0.5m frame, oriented with the 0.5m ends on the east and west. Adjust S2 to avoid sampling any closer than 1m from the plot edge (shouldn’t be needed). Exceptions to avoid noNI subplots: ASP2 R2 S2 and ASP2 R4 S2, sample 0.5mS, 0mEW to NE corner of 2 x 0.5m frame. Clip all plants rooted inside the frame as close to the ground as possible without collecting litter or soil. Store samples in closed black bags in a refrigerator until sorted, as follows: MEDSA, Medicago sativia, alfalfa; DACGL, Dactylis glomerata, orchard grass; TRFPR, Trifolium pratense, red clover; CICSP, Cichorium spp, six-point chicory; remainder label UNSRT. - Alyssa, Sarah, Brian, Emily, Jon

BCSE Series 3 gas sampling - Jon, Brian

BCSE Hydrosense - Emily

BCSE pre-fert soil sampling. G1-5, R1-4. One core per station, three cores pooled per plot. Where row crop stubble visible, one core in the row, one core halfway between rows, and one core halfway between those locations. - Emily, Jon, Brian, Olivia

LTAR Series 6 gas sampling - Olivia, Emily, Jon, Brian

LTAR Hydrosense - Alyssa

Replace T6 station flags post-harvest - Jon

Cut back grass around LTER lysimeter boxes and clean inside of box around lid - Emily, Brian

Collect LTAR leachate - Emily, Jon

Prep LTAR and BCSE gas chambers - Brian, Sarah

Evacuate LTAR lysimeters - Brian, Olivia

Cut trees on station flag paths in T7 - Emily, Jon

2nd April LTER soil sampling - Alyssa, Sarah, Brian, Jon, Emily

Cut trees on station flag paths in T7 -

LTER Series 3 gas sampling - Jon, Brian, Emily, Alyssa, Stacey

LTER Hydrosense - Alyssa, Emily

LTAR Series 5 gas sampling - Emily, Olivia, Jon, Brian, Alyssa (Hydrosense)

Finish N-deposition fertilization with R2, R3. - Emily, Jon, Brian

Reinstall ASP5 main and noNI gas chambers - Brian

LTER N-deposition fertilization, finished CF1, DF1 and SF1. - Emily, Sarah, Jon

Using Urea (46% N), first of three applications for 2026.

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.

Collect LTER leachate - Emily, Jon

Prep LTER, LTAR gas chambers; pull ASP5 main and noNI for herbicide - Brian, Olivia

Clean boxes and evacuate LTER lysimeters - Sarah, Emily

Fix leaning BCSE flags, cut rees on foot path in T7 - Jon, Brian, Sarah

BCSE Series 2 gas sampling - Jon, Emily BCSE Hydrosense - Alyssa

Fix LTAR and GLBRC station flags - Olivia

LTAR Series 4 gas sampling - Olivia, Jon, Brian, Emily LTAR Hydrosense - Alyssa

Install and fix LTER and LTAR station flags - Jon, Emily

BCSE and LTAR gas frame prep. All LTAR gas frames given colored flags that match gas sampling grouping - Sarah, Brian

Collect LTAR Lysimeters and O-rings from field (to be washed).

Evacuate LTAR Lysimeters - Jon, Brian

Forest Maintenance - Brian, Emily

Help move OTC’s in T7- Jon

LTER 1st April soil sampling and sieving - Alyssa, Jon, Emily, Brian, Sarah.

Collect LTER Lysimeters - Jon AM/PM, Emily PM

Install LTER station flags - Emily AM, Brian AM/PM, Olivia PM

LTER Series 2 gas sampling - Emily, Brian, Sarah, Jon, Alyssa/Stacey

LTER Hydrosense - Alyssa

Prep LTER gas chambers, install T7, T7 micro and T8. T7 R1,3,4 microplot chambers were installed too far north and outside the microplot - had to be reinstalled just prior to sampling 4/1) - Emily, Jon

Prep LTAR gas chambers, reinstall ASP4, ASP5 and installed for the first time ASP2, ASP4, and ASP5 noNI subplot chambers. New chambers were measured for installation: 20m from the south side and 3m east or west from the plot edge (opposite side from the main plot chamber) - Jon, Brian

Burn all six T7 plots and former CE study - Stacey, Kevin, Sven, Joe, Ethan, Jarrod, Mark, Hsunyi, YJ, Alyssa, Emily, Brian, Jon, Elaine, Lucas, Erica, Holly

LTAR March soil sampling. No longer sampling R5 plots (may resume later this year). First time sampling no Nitrification Inhibitor (no NI) subplots in ASP2, ASP4, ASP5, these are on the opposite side of the plot from the main plot gas chambers, 15 feet wide. In the noNI subplots, six cores were taken in roughly the center of the subplot strip and in line EW with station 1,2,3, two cores per “station”, one in the row and one between. In the main plot station 1 and 2 were sampled NW of the station while station 3 was sampled east of the station to avoid the noNI subplots. - Alyssa, Brian, Jon, Emily

Collect LTAR leachate - Brian, Alyssa

Evacuate LTAR lysimeters - Olivia, Brian

Reflag LTAR plots with GPS - Brian

LTAR Series 2 gas sampling - Brian, Sarah, Stacey/Alyssa

LTAR Hydrosense - Alyssa

LTAR gas chamber prep - Jon

March LTER soil sampling, NW of the stations (no station flags in T1,6,8 - locations approximated) - Alyssa, Brian, Sarah, Jon, Stacey

Collect LTER leachate - Jon, Brian

Evacuate LTER lysimeters - Jon, Brian

Flag forest paths, fix border PVC - Jon, Brian

LTAR Series 1 gas sampling - Olivia, Jon, Brian

Dump leftover plant samples (researcher stored samples, LTAR 2025) - Olivia, Jon

Collect LTAR leachate - Brian, Jon

Evacuate LTAR lysimeters - Brian, Jon

Dump soil, clean up field sites, install G1 station flags - Sarah, Brian

Check LTAR gas chambers, pull out ASP3 no compost chambers and install them in ASP2 no compost microplots based on GPS file - Jon, Olivia

LTER Series 1 gas sampling (last winter sampling) - Jon, Alyssa, Dave

Prep LTER gas vials, grind LTAR plants - Jon

BCSE Series 1 2026 gas sampling - Jon, Olivia

Check BCSE and LTER gas chambers - Jon

Pull G8 flags for tree harvest soon, dump soil samples - Olivia, Brian

Dump finished (nitrate and ammonium uploaded and checked) soil samples -

Dumped leftover BCSE 2025 plants, then started dumping finished soil samples - Brian, Sarah

Finish dumping LTER leftover plants - Sarah

Pick up LTAR field samples from Josh, dump LTER leftover plants - Jon

LTAR Series 32 gas sampling - Brian, Jon, Sarah

LTER Series 18 gas sampling - Alyssa (am), Jon, Brian, Olivia (pm)

Check LTAR gas chambers ahead of 2/9/2026 sampling -

BCSE Series 25 gas sampling - Jon, Brian

Check LTER gas chambers ahead of 2/6/2026 sampling - Olivia

Check BCSE gas chambers ahead of 2/5/2026 sampling - Jon

LTAR Series 31 gas sampling - Alyssa, Slater, Jon

BCSE Series 24 gas sampling - Brian, Sarah

LTER Series 17 gas sampling - Slater, Brian, Sarah

mcse loggernet network was in a jabber state. I shut down the T7 R6 and R4 radios and it cleared up. I removed the radios from R2, R6 and R4, since the sensors were out.

Data is flowing again

Measure trees in CF3. Done measuring trees for this year. - Slater, Brian, Sarah, Ethan, Jarrod

Check all gas chambers (LTER, GLBRC, LTAR) -

Measure trees in DF2, CF2 and DF3 - Slater, Sarah, Brian, Ethan, Jarrod

Measure trees in DF1 and DF2 - Alyssa, Sarah, Brian, Ethan, Jarrod, Olivia

Measure trees in DF1 - Alyssa, Olivia, Brian, Ethan, Jarrod

Measure trees in CF1 and DF1 - Alyssa, Slater, Olivia, Sarah, Brian

Final forest leaf litter collection, put away screens, bungees and clips, flip traps over -

LTAR 30 gas sampling - Slater, Sarah, Jon

Check LTAR gas chambers - Slater

BCSE 23 gas sampling - Olivia, Jon

Check BCSE gas chambers - Jon

Collect LTAR leachate - Brian, Jon

Measure poplar trees - Slater, Sarah, Jon, Brian

Evacuate LTAR lysimeters, boxes needed to be dug out from under the snow - Slater, Brian, Jon, Sarah

Measure poplar trees - Jon, Brian

LTER 16 gas sampling, first winter - Brian, Slater, Sarah, Alyssa, Jon

LTAR soil sampling; approximated station flag locations in these plots since flags hadn’t been installed: ASP1-3, ASP2-3, ASP2-4, ASP5-4, ASP3-4, BAU1-4, BAU2-3, BAU2-4 - Alyssa, Slater, Brian, Jon, Sarah

Collect leaf litter from CF, DF, SF; collect last leaf litter from T5 then pulled/put away traps - Slater, Jon, Brian, Olivia

BCSE subplot soil sampling; G1-3 nine cores/subplot, G4-10 six cores/subplot. This includes G1 non-stover removal area; G2, 3, 4, 5, 6, 7, 9 unfertilized area; G8 historically unfertilized area (south end, between 1st and 2nd rows); and G10 fertilized area. - Alyssa, Slater, Olivia, Brian, Sarah Jon

Install G1 gas frames - Brian

BCSE main soil sampling; G1-3 three cores per station to ensure enough soil to send to A&L, G4-10 two cores per station. - Alyssa, Sarah, Olivia, Slater, Jon, Brian

LTAR Series 29 gas sampling - Slater, Jon, Brian

LTAR Hydrosense - Alyssa

LTAR gas chamber prep - Slater

Collect LTAR leachate - Brian, Jon

Sample MLE MC Lake City soil - Todd, Chris

Evacuate LTAR lysimeters, pull T8 flags and frames for mowing, straighten BCSE flags, install LTAR flags - Slater, Jon

BCSE G1 residue collection post-stover harvest. Used 0.5×0.5m frame in 7 locations in each plot: one in each windrow and one between each windrow. Along a diagonal transect from SW (sample 1 = between) to NE (sample 7 = between) plot corner avoiding the non-removal microplot and the plot edges. - Slater, Jon, Sarah, Brian

Collect leaf litter from traps in T5, G8, CF, DF, SF. Pull traps from G8, as trees are bare. - Jon, Brian, Olivia

Pull T6 station flags - Jon

BCSE Series 22 gas sampling - Jon, Brian, Alyssa (Hydrosense)

Collect LTER leachate - Brian, Jon

Evacuate LTER lysimeters - Jon, Olivia

BCSE gas chamber prep - Brian

LTER soil sampling - Alyssa, Brian, Olivia, Jon

Replace BCSE then LTAR station flags - Olivia, Brian

Sample Sorghum Nitrogen Rate Experiment soil. Location 2: one core per plot, pooled by block, 4 total. Location 1: split into northern and southern halves, one core per plot, pooled by block, 8 total. - Slater, Jon

Sample BCSE soil for laboratory respiration incubation. G1,3,5,8,10, R1-3. Four cores/plot, one or two per station, alternating within and between crop row for G1, G3 and G8. Three cores/plot, one per station pooled for G5 and G10. - Sarah

LTAR Series 28 gas sampling - Slater, Brian, Jon, Alyssa (Hydrosense)

Collect LTAR leachate - Slater, Brian

LTAR gas chamber prep - Olivia, Sarah

Evacuate LTAR lysimeters; replace BCSE station flags - Slater, Jon

LTER Series 15 gas sampling - Alyssa, Slater, Jon, Olivia, Sarah

LTER Hydrosense pm - Alyssa

Collect leaf litter from traps in T5, G8, CF, DF, SF; reinstall LTER gas chambers in T1-4, plus prairie strips - Brian, Slater, Jon, Olivia

Shell LTAR Inhibitor Study corn with Josh Dykstra - Sarah

Sample LTAR Inhibitor Study corn - Kevin, Dave, Sarah, Josh

Prep LTER gas chambers. After chambers were prepped, heard from Joe that gas sampling could not happen tomorrow due to lime applications planned for T1-4. - Slater, Brian

Pulled all T1-4, plus prairie strip, gas chambers for lime. Finished clipping ASP2 plants. - Alyssa, Slater, Brian, Jon

LTAR November soil sampling, 4 cores/station, 12 cores total to ensure enough soil for both A&L analysis and air-dried archive besides extraction and moisture - Slater, Jon, Brian, Olivia, Sarah

Pull ASP6 flags and chambers for harvest

Start ASP2 plant sampling; Stations 1, 2, 3: 2mS, 0.5mW to NE corner of 2 x 0.5m frame, oriented with the 0.5m ends on the east and west. R5: Split the plot into quarters. Place the frame approximately in the center of the western most quarter (label west) and the eastern most quarter (label east). The frame should be perpendicular to forage rows, if visible. Sorted later in the field lab to MEDSA, TRFPR, CICSP, DACGL, BRSNA (live volunteer canola), and remainder UNSRT. - Jon, Brian, Olivia, Sarah

Switchgrass Nitrogen Rate Experiment (SWF) soil sampling to send to A&L. Six cores/plot taken from the yield strip harvested area down the center of each plot, along a diagonal from NE to SW plot corners. - Brian, Slater, Jon, Emily

LTAR 27 gas sampling - Emily, Ainsley, Jon, Alyssa (Hydrosense)

ASP1 plant sampling ahead of mowing tomorrow, Stations 1, 2, 3: 1mS, 0.5mW to NE corner of 2 x 0.5m frame, oriented with the 0.5m ends on the east and west. R5: Place the frame approximately in the center of each half of the plot (east and west halves). Sorted in the field lab later… MEDSA, TRFPR, CICSP, DACGL, BRSNA (live volunteer canola), remainder UNSRT - Alyssa, Slater, Brian, Jon, Emily, Ainsley