Inorganic N extraction, soil moisture and gas samples analyzing

Jan. 31, 2006

Conducted soil inorganic N extraction with 2M KCl and filterate the extracted solution and then store in the freezer.

Conducted soil moisture measurement with dry method

Asked NSTL to analyze gas samples we collected last Saturday in the field.


With Phil and Jim (NSTL)

Gas and soil cores samplings

Jan .28, 2006

Collected gas samples in all sites for N2O gas flux.

Collected soil cores in all sites for soil moisture, nitrate and ammonia analyzing.

Took 0ld poly-bags (with 10cm intact soil cores) and buried new poly-bags (with 10cm intact soil cores) in RCF, RWB,RWG, and RCG.

- lost a poly-bag in RWB and left a poly-bag in RWG owing to frozen.

Fig. .1. A polyethylene bag contained 10cm intact soil core was buried around gas collecting point in RWB.

With Lindsey and Phil

Groundwater gas sampling

Jan. 25, 2006

Collected 18 samples (10ml) of groundwater and inserted into 20ml evacuated vials in North and South Ron Risdal farm site.

Stored 4 oC in the lab.



With James Gilbert

Gas sampling and a data logger for air temp.

Jan. 16, 2006

Collected gas samples on soil surface in LWB,LWG,JWB,JWG,RWB,RWG,RCG and RCF.

Installed a data logger with an air temp. sensor in RWB (measuring 4min interval, recording 1hr interval, 3:30 PM)

Fig. 1. Gas sampling in a warm season grass filter site in Ron Risdal farm (Lindsey).

Fig.2. Installing a data logger with a thermal sensor to record air temperature in a wood buffer (RWB) in Ron Risdal farm site (Dong-Gill).

Fig.3. A data logger with a thermal sensor to record air temperature in RWB.

Manifold (vials evacuation equipment) set up

Jan. 11, 2006

Dr. Tom Isenhart set up a manifold (vials evacuation equipment) in the lab. Using the equipment, we can flush sampling vials with He gas and then evacuate the vials with a vacume pump easily.

Fig. 1. A manifold, an equipment for He flushing and evacuating of gas storage vials in the lab

Gas sampling on snow surface and soil surface after removing snow

26, 26 December, 2006 with Keegan and Lindsey

Conducted gas sampling on snow surface in woody buffer, warm and cool season grass filter and crop field in Ron Risdal site.

Fig. 1. Installed a gas chamer on snow surface

Conducted gas sampling on soil surface after removing snow in woody buffers, warm and cool season grass filters and crop field in Ron Risdal, John Risdal and Lonnie Strum site.

Fig. 2. Installed a gas chamber on soil surface after removing snow

Fig. 3. Measuring an anchor length after removing snow (Keegan Kult)

Fig. 4. Collecting gas samples in snowy crop field (Lindsey Barney)

gas sampling on snow surface and soil surface after removing snow

December 19,20,21

Conducted gas sampling on snow surface and then soil surface after removing snow in RWG,RWB,RCG, and RCF

Conducted gas sampling on soil surface after removing snow in LWG, LWB,JWG and JWB.


With Lindsey and Zack

Fig. 1. Warn season grass filter site in Lonnie Strum

Fig. 2. Gas sampling point (destg 5) in warn season grass filter site in Lonnie Strum

Fig. 3. Gas sampling (destg 5) in warn season grass filter site in Lonnie Strum

Fig. 4. Measuring soil moisture and soil temperature around an anchor in wood buffer of Lonnie Strum site (Lindsey Barney)

Fig. 5. A lonly tree in snowy field

Gas sampling (snow inside anchors)

December 6, 2005

Collected gas samples (intacted snow were inside anchors) in John Risdal farm site.

* New idea-

collect gas samples on the snow surface and removing the snow of inside anchors. Is there any significant differece?

Fig. 1. Snow around anchors were removed,however, snow inside anchors were not disturbed.

Gas sampling (snow inside anchors)

December 5, 2005

Collected gas samples in Lonnie Strum farm site.
We removed snow around anchors, however, we did not disturbed the snow inside anchors.


* Our green van stopped in the middle of R77. It's an amazing situation! The school tansfortation servive brough other van to us and we continued the trip. Meanwhil, I took several pictures around there.

With Keegan

Fig. 1. Our green van stopped on the road R77

Fig. 2. Trees and white world

Gas sampling on the surface of snow

December 2, 2005

Collected gas samples on the surface of snow in North and South Ron Risdal farm site.

Removed the snow accumulated around anchors and above of anchors, however, did not remove snow which were inside of anchors. So the inside height of gas chambers is only the length of lid.

Downloaded the weather station data in Ron Ridal farm and percipitation data in Lonnie Strum farm.

Fig.1. Crop field site were covered by snow


With Keegan

Groundwater sampling

December 1, 2005

Collected groundwater to quantify dissolved N2O gas in North and South of Ron Risdal farm sties.

Fig.1. Ground water collecting and measurement of DO, EC, and Temp. (James Gilbert)

With James Gilbert

Midnight madness gas sampling

November 21, 22, 2005

We collected gas samples in a warm season garss filter, a cool season grass fitler, a woody buffer and a soy field every 3hr during a day (start 10:00 am November 21; finish 07:00am November 22)

Fig. 1. Collecting gas samples in wamr season grass filter in Ron Risdal site (Zack DeYoung, 13:00 November 21, 2005)

Fig. 2. Collecting gas samples in warm season grass filter in Ron Risdal site (Zack DeYoung, 22:00 November 21, 2005)

freezing and thawing incubation experiment

November 11~16, 2005

start time of incubation at 4 degree
11/11/2005. 16:30
11/11/05 18:58:01.0
4 degree condition

1st flux measurement, 4 degree
covering lids : 11/12/2005, 11:00
gas sampling: 11/12/2005, 13:00 and 16:00
start soil freezing, - 4 degree
11/12/2005 16:30

2nd flux measurement, -4 degree
covering lids: 11/13/2005, 14:00
gas sampling : 11/13/2005, 16:00 and 19:00
CF 3-3, CF 4-3 : collected gas samples two tines at 16:00

3rd flux measurement, -4 degree
covering lids: 11/14/2005, 17:00
gas sampling: 11/14/2005, 19:00 and 22:00

4th flux measurement, 4 degree
covering lids: 11/15/2005, 11:00
gas sampling: 11/15/2005, 13:00 and 16:00

5th flux measurement. 4 degree
covering lids: 11/15/2005, 19:00
gas sampling : 11/15/2005, 20:00 and 23:00

6th flux measurement. 4 degree
covering lids: 11/16/2005, 16:00
gas sampling : 11/16/2005, 18:00 and 21:00

Fig. 1. Freezing incubation in the lab freezer (-10oC).

Soil cores sampling and incubation experiment

November 11, 2005

We are conducting incubation experiments to measure N2O emission during thawing of froze soil. In November 11, Friday afternoon, we collected 5 intact soil cores (D 5cm * L 7cm) in warms season grass filter, woody buffer, cool season grass filter and crop field in Ron Risdal farm site, respectively (total 20 each). These soil cores are using for incubation experiments. Also simultaneously we collected a intact soil core (D 3.5cm * L 7 cm) beside the points where the intact soil cores (D 5cm X L 7cm) were collected (total 20 each). These soil cores are using for analyzing of soil properties such as soil moisture, bulk density, TN, TC, nitrate, ammonia, etc.

Fig. 1. Nitrae and ammonia extraction from sampled soil.

dry fine roots and evacuated gas vials

November 9, 2005

Weighted dry mass of fine roots

evacuated gas vials

With Zack and Jim

soil core sampling and fine root dring

October 8, 2005

soil core sampling in Lonnie Strum

washed fine roots and put the fine roots into dry oven


Jason, Jin-ki, Leigh Ann and Phil

soil core sampling

Collected soil cores using a Jack hammer (deep 1.5m) in Lonnie Strum site

With Dick, Jin-Kie, Keegan, Mustafa, and Lindsey

Gas sampling and buried fine roots mesh bags

Colleced gas samples in the crop field, woody buffer, warm season grass fitler and cool season grass filter in Ron Risdal farm site.

Installed fine root mesh bags in shallow deep soil in the woody buffer, warm season grass fitler and cool season grass filter in Ron Risdal farm site.

Fig.1. Buried fine mesh bags contained with fine roots in cool season grass filter in Ron Risdal site.

Fig. 2. Buried fine mesh bags

sorting fine roots and fine root mesh bags

November 3, 2005

Sorted fime roots and then weighted the dry mass

Put the fine roots into mesh bags and then attached label tag

With Phil

Groundwater sampling for N2O gas in groundwater

November 1, 2005

Sampled groundwaters in Ron Risdal North and South sites.

With James