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.

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).

Sticky traps - Sam, Emily

LTER gas chamber prep - Bella, Jon

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

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

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

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

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 -

Sticky traps - Emily, Brian, Jon

Collect LTAR leachate - Glori, Bella

LTAR gas chamber prep - Sam, Jon

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 -

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 -

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

Finish ASP4, 5 flagging stations with REACH - Jon

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

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.

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.

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

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

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

Evacuate LTAR lysimeters - Olivia, Brian

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

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

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

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

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

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

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

LTAR gas chamber prep - Brian, Jon, Sam

Sticky traps - Brian, Emily

Collect LTAR leachate - Sam, Jon

BCSE 11 gas sampling and Hydrosense - Emily, Glori

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

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

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

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

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

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

BCSE Series 9 gas sampling - Jon, Bella

BCSE Hydrosense - Emily

NAS gas and Hydrosense - Olivia

Use REACH to collect T7 microplot corners (Hsunyi trained) - Glori, Jordyn

Pull and immediately replace T-posts/sticky cards for cultivating in T4 and side dress in T3 - Sam, Jon

Finish woody maintenance - Jon, Sam

Help move T7 rainout shelters into the plots - Glori, Bella

Clean trucks - Brian, Jordyn

LTAR gas chamber prep, immediately prior to gas sampling. Agronomic plans changed and gas sampling needed to be moved from 6/19 to 6/18 - Jon, Sam, Glori, Brian, Emily, Jordyn

LTAR Series 14 gas sampling - Jon, Sam, Glori, Brian

LTAR Hydrosense - Emily

Woody maintenance - Brian, Jordyn

Sticky traps - Emily, Jon, Sam, Olivia

Collect LTAR leachate - Brian, Jordyn

BCSE gas chamber prep - Glori

NAS gas and Hydrosense - Olivia

The added REX radios caused the RF407 network to go into a nework storm. I turned off T7R4, R5, R3 and R1. The network traffic went back to normal. I restarted T7R1 and it's stable so far.

Sticky traps, pull T1 and T3 for side dress - Jon, Emily, Sam, Brian

Evacuate LTAR lysimeters - Jon, Sam

raised the antenna on the Switchgrass tower at lux arbor to improve connectivity.

LTER 2nd June soil sampling -

Pull T2 sticky cards, T-posts for side dress -

Woody maintenance -

LTAR Gas Sampling Series 13 - Jon, Sam, Jordyn, Glori; LTAR Hydrosense - Emily

Install LTAR ASP1, ASP3, and BAU1 flags - Brian, Emily

Woody maintenance - Jon, Emily

LTER Series 7 gas sampling - Brian, Jon, Sam, Bella, Glori; Hydrosense - Emily

LTAR gas chamber prep - Jordyn

Replace G1-3 station flags - Emily, Glori

Sticky traps -

BCSE Series 8 gas sampling - ; Hydrosense - Emily

LTER gas chamber prep -

Collect LTER leachate -

Sticky traps -

BCSE gas chamber prep -

Evacuate LTER lysimeters - Sam, Emily, Glori

NAS soil, gas, Hydrosense sampling - Olivia

LTAR 12 gas sampling - Brian, Jon, Glori, Jordyn

LTAR Hydrosense- Emily

Remove and replace T4 T-posts during rotary hoeing - Olivia

NAS gas and hydrosense sampling - Olivia

Dump plant and soil samples - Emily, Jon

BCSE 7 Gas sampling - Glori, Sam

BCSE Hydrosense - Emily

LTAR gas chamber prep - Jordyn, Brian

Prep BCSE gas frames - Emily, Bella

Collect LTAR Lysimeters - Glori, Jordyn

Sticky traps, install T-posts in T4 - Brian, Jon, Sam

Sticky traps (install T1-3) - Emily, Jon, Sam

Install T4 short station flags - Brian

Evacuate LTAR lysimeters - Alyssa, Jordyn

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

ASP1 forage 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, if necessary, to avoid sampling any closer than 1m from the plot edge. Clip all plants rooted inside the frame as close to the ground as possible without collecting litter or soil. Put clipped plants into paper bag(s) LIVE. Store samples in closed black bags in a refrigerator until sorting. Sort plants as follows, in the field lab: MEDSA, Medicago sativia, alfalfa; TRFPR, Trifolium pratense, red clover; CICSP, Cichorium spp, six-point chicory; DACGL, Dactylis glomerata, orchard grass; BRSNA, live volunteer canola; remainder label UNSRT. -

Nitrogen Application Study (NAS) gas and Hydrosense sampling - Olivia

Install chambers just prior to sampling LTER gas: T1R3, T1R2, T4R1, T1R4, T1R1, T2R2. LTER 6 gas sampling - Brian, Glori, Jon, Sam, Emily, Jordyn, Alyssa

LTER Hydrosense - Emily

Collect LTER mainsite leachate - Alyssa, Jon, Sam

BCSE 6 gas sampling - Jordyn, Glori

BCSE Hydrosense - Emily

LTER gas chamber prep - Brian, Sam

Collect LTER forest leachate, evacuate LTER mainsite lysimeters - Emily, Jon, Brian

LTAR 11 gas sampling - Glori, Jordyn, Jon, Sam, Bella (w/Jon or Sam)

LTAR Hydrosense - Emily

Evacuate LTER forest lysimeters, trim forest paths - Olivia, Bella, Jordyn, Glori

Sticky traps - Emily, Sam, Jon, Brian

Connected ltar tower 4 (BAU) with the wifi connection. Reinserted one heat flux plate and connected the VOLT116 to the datalogger.

LTAR soil sampling - Alyssa, Glori, Jordyn, Bella, Jon, Brian

BCSE G1,3-5 gas chamber prep - Jon, Brian

Sticky traps - Emily, Sam

LTAR gas chamber prep -

ASP3 cover crop 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, if necessary, to avoid sampling any closer than 1m from the plot edge. Clip all plants rooted inside the frame as close to the ground as possible without collecting litter or soil. Sort plants as follows, in the field: SECCE, Secale cereale, cereal rye; CAMSA, Camelina sativa, winter camelina; UNSRT, all other clipped plants. -

BCSE Series 5 gas sampling - Jordyn and Glori paired with Brian and Jon

BCSE Hydrosense - Emily

Nitrogen Application Study (NAS) pre-plant gas, soil and Hydrosense sampling - Olivia, Alyssa trained on Hydrosense

LTAR Series 10 gas sampling - Jordyn trained with Alyssa, Sam, Jon, Brian, Glori (accompanied another tech)

Install BCSE G1,3,4,5 gas chambers, then LTAR Hydrosense - Emily

Install short flags in T3 - Brian, Glori

Collect LTAR leachate - Bella with Emily, Jordyn with Jon

Prep LTAR gas chambers - Gloria with Olivia

Sticky traps (T5-7, forest) - Brian, Sam

Replace station flags, LTER with Trimble, LTAR with Reach - Jon, Emily

Install 10 chambers in Lysimeter Fetch field (NW corner, near T2R6) for pre-fert gas sampling on 5/22 for Olivia's knifed-in vs. surface applied nitrogen study with Kevin - Olivia, Kevin

Evacuate LTAR lysimeters - Sam, Brian

Sticky traps (install T5-7, install and attach cards to T3, T4 prairie strips) - Emily, Jon

Replace station flags with Reach (Hsunyi trained) on LTAR, file lost from the Trimble - Brian, Bella

Empty Grieve and FSC ovens, dump old samples - Sam, Jordyn

T3, T4 station and prairie strip soil sampling, 4 cores/station and 4 cores spread across the strip avoiding sampled areas, walking paths and no-burn microplot - Emily, Jon, Sam, Brian, Bella, Glori

Replace T1, T2 station flags (in corn row) with short flags - Emily, Sam

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

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

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.

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

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

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

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

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.

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