LTAR 5 gas sampling -

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

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.

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

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?

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

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

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

Evacuate LTAR lysimeters - Mae, Trajana, Brian, Emily

Finish clipping ASP3 -

LTAR Series 26 gas sampling - Alyssa, Brian, Emily, Andie (Hydrosense)

MLE MC Lake City soil sampling - Todd, Chris

ASP2, ASP3 end of season plant sampling. All stations: 2mN, 0.5mW to SE corner of 2 x 0.5m frame, oriented with the 0.5m ends on the east and west. Sorted plants later in the field lab: MEDSA, TRFPR, CICSP, LOLMU, DACGL, BRSNA (live volunteer canola ) and the remainder UNSRT. - Emily, Brian, Trajana, Mae, Slater

LTER soil sampling - Alyssa, Slater, Trajana, Mae, Olivia

LTAR gas chamber prep -

MLE MN Escanaba soil sampling - Todd, Chris

BCSE Subplot soil sampling… 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. Nine 0-25cm cores from each area, along a diagonal transect within each subplot. When a row crop had been present then alternated coring between row and within row. No samples taken from the previously sheltered area in G5. - Alyssa, Brian, Slater, Trajana, Mae

Help David Lowry’s lab sample switchgrass - Emily, Andie

Collect LTER leachate - Slater, Emily, Emily, Trajana

Help David Lowry’s lab with switchgrass sampling - Olivia, Mae

KK/SV finished switchgrass gradient deep cores today, 6 plots (12 cores). Total of 64, two per plot. Core 1 was always in the south half of the plot and Core 2 in the north.

Evacuate LTER lysimeters, included all new forest lysimeters (installed in the last month: CF1, CF2, CF3, DF3, SF3). - Emily, Slater, Olivia

LTER Series 13 gas sampling - Alyssa, Slater, Emily, Trajana, Mae, Andie (Hydrosense)

MLE MS soil sampling - Todd, Chris

Completed all but 12 deep cores on the Switchgrass Gradient project. KK/DW Still need to collect inorganic N samples and another gas sample due soon.

Thresh LTER soybeans - Mae, Trajana, others, two people at a time with Jarrod and Ethan

LTER gas chamber prep - Emily, Slater

BCSE Series 17 gas sampling - Slater, Alyssa, Andie (Hydrosense)

Thresh LTER soybeans - Trajana, Mae, Slater, Emily, two people at a time with Jarrod and Ethan

BCSE main soil sampling, three 0-25cm cores per station, alternated in and between rows where present - Brian, Trajana, Mae, Andie, Alyssa

Collect LTAR leachate, collect leaf litter from traps in T5, G8, CF and DF, BCSE gas chamber prep (all needed to be installed post-harvest) - Emily, Slater, Olivia, Andie, Trajana, Mae, Brian

Evacuate LTAR lysimeters - Emily, Slater, Mae, Trajana, Brian

T7 post-frost plant sampling - Slater, Brian, Trajana, Mae, Olivia

LTAR Series 25 gas sampling - Emily, Mae, Trajana, Andie (Hydrosense)

Finish N-deposition fertilization (CF3 only) - Alyssa, Brian

Finish installing BCSE station flags -

Post-frost plant sampling in T7, 4mN, 4mW of each station flag to the SE corner of 2x0.5m frame, just UNSRT and SURFL -

Final forest fertilization (N-deposition microplots), finished all except CF3 - Alyssa, Slater, Olivia

Prep LTAR gas chambers; replace BCSE station flags in G1,3,4,5,7,9,10, finished R1-3 - Brian, Trajana

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

Shred G2 sorghum -

Install BAU1 station flags - Emily, Andie

Finish LTER soil sampling -

Install station flags in ASP4 -

Replaced the battery of the T7R4 logger on monday. The battery went down below 9V again overnight. I disconnected the SDI12 sensor power to see if there might be a short in one of the sensor cables.

LTER soil sampling (finished T1-7 R1-5 plus T1R6 and T2R6) - Brian, Mae, Trajana, Slater, Alyssa

Finish replacing T4 station flags -

LTER T4 separate station, strip soil sampling. Two push core samples per station, one in the new wheat row and one in between rows. Augers had to be used for the prairie strip sampling, three 0-25cm auger samples spread across the strip avoiding edges and foot paths. - Alyssa, Slater, Emily, Brian, Olivia

G1 post stover harvest residue collection. Used 0.5×0.5m frame in 7 locations in each plot: one in each windrow and one between each windrow, along a diagonal from SW to NE. Also, measured the width of each windrow and space between. - Stacey

Finish G6 ANPP sampling, resume BAU1 corn sampling ahead of harvest - Alyssa, Mae, Trajana, Brian, Emily

LTER T3 separate station, strip soil sampling. Two push core samples per station, one in the new wheat row and one in between rows. Augers had to be used for the prairie strip sampling, three 0-25cm auger samples spread across the strip avoiding edges and foot paths. -

Replace T4 station flags -

BAU1 R1 corn sampling ahead of harvest. All stations: 0.66mN, 0.66mW to SE corner of 1.52 x 0.66m frame. -

Final aphid tower sample mailed for 2024 - Emily

Collect leaf litter from T5, G8 and LTER forest traps -

Continue G6 ANPP -

Finish installing new LTER forest lysimeters in CF1 lysimeters 1 and 6 - Kevin, Dave

Install station flags in LTER T1-3 -

ASP4 corn sampling, All stations: 0.66mN, 0.66mW to SE corner of 1.52 x 0.66m frame. -

Resume G6 ANPP sampling -

LTAR Series 24 gas sampling - Mae, Trajana, Alyssa, Andie (Hydrosense)

Finish G2 ANPP sampling -

Start G6 ANPP sampling. All stations: 3mN, 1.5mE to SW corner of 1.52x0.66m frame -

M4 plant species composition transects - Alyssa, Andie

Install LTAR station flags - Stacey

Install lysimeters into CF2 lysimeters 1, 3, 6, and CF1 lysimeter 3 - Kevin, Dave

Finish G1 ANPP sampling -

Start G2 sorghum ANPP sampling. All stations: 3mN, 1.5mE to SW corner of 1.52x0.66m frame. Weigh wet to later calculate percent moisture ahead of shredding -

LTAR gas chamber prep -

Install DF3 lysimeter 6, and SF3 lysimeters 1, 3, 6. Installation rod could not be pulled from the first hole at SF3-1. Rod had to be dug out, the hole filled in, and the lysimeter installed in a new hole. - Kevin, Dave

Finish G1 corn ANPP sampling - Slater, Andie, Brian, Trajana, Mae

Install new lysimeters in CF3 (lysimeters 1, 3, 6) and DF3 (lysimeters 1, 3) - Kevin, Dave

Finish G3 soybean ANPP sampling, start G1 corn sampling (Used 1.52 m x 0.66 m frame All stations: 3mN, 1.5mE to SW corner of 1.52x0.66m frame) -

LTER Hydrosense for Series 12 - Andie

G6 species composition transects. Three NS transects per plot, main only. Each transect ~2m west of the station flags and numbered 1-3 based on the station number. Stop about every 1m to identify and measure first intercepted plant. -

G3 soybean ANPP (should have been sampled earlier, plants are past peak). Used 1.52 m x 0.66 m frame. All stations: 3mN, 1.5mE to SW corner of 1.52x0.66m frame. Finished R1-3. - Slater, Brian, Trajana, Mae

LTER Series 12 gas sampling. Prairie strip sampling had to be done in the afternoon because only four trained techs were present to sample. No personnel available to take Hydrosense readings. Since no rain in forecast, Hydrosense data will be collected on 10/11/2024 by Andie. - Alyssa trained Trajana and Mae, Slater, Andie, Brian

LTER gas chamber prep - Slater, Mae, Trajana, Brian

Finish T4 soybean sampling - Alyssa, Emily, Brian, Mae, Trajana

Collect soybean stover from the irrigated blocks 5-8 of the LTER Resource Gradient following harvest. Same procedure as 10/4/2024 rainfed. - Stacey