Changed a rain guage data logger etc.

December 29, 2006

Changed the data logger of rain guage in Ron Risdal site.



Downloaded data from RWB, RWG, RCG and RCF.

Soil temperature sensor of RCF is needed to be changed.


With Lindsey

Gas sampling

December 27th, 2006

Collected gas samples in all sites.
The first anchor of RCG site had ice inside. Check gas flux data of the anchor (see 2nd below photo).

With Lindsey and Phil

Groundwater sampling for dissolved N2O gas

December 22, 2006

Collected groundwaters for determination of dissolved N2O in groudwater in South of Ron Risdal site.

With Jessi

Groundwater sampling for dissolved N2O gas

December 20, 2006

Collected groundwater samples in North of Ron Risdal site (6 wells)

With Jessi

Gas sampling and intact soil core sampling etc.

December 19, 2006

Collected gas samples in all sites

Sampled 10cm intact soil cores in all sites for analyzing nitrate and amminia in soil

Collected buried soil bags and buried new soil bagas in RWB,RWG,RCG, and RCF.





With Lindsey, Phil and Grant

Gas sampling and install corn decomposetion bags

December 08, 2006

Collected gas samples in RWB, RWG, RCG and GCF.

Soil was frozen so we used an electric drill to make holes and then inserted soil thermometers inside the holes.






Installed 12 mesh bags with corn residuals (20.0g) around gas sampling points in RCF (crop field).


With Grnat

Gas sampling and install orange flags

December 5, 2006

Collected gas samples in LWB, LWG, JWB and JWG.

Installed orange flags aroud gas chamber anchors and orange tapes around trees to make easy finding sampling points when snow covers the sites.

With Lindsey and Bryan

N2O gas sampling from groundwater samples

November 29, 2006

Collected gas samples from groundwater we collected from Ron Risdal sites.

Gas sampling and install a datalogger and anchors in crop field

November 28, 2006

Collected gas samples in all sites but crop field.

Installed a datalogger with soil temperature and soil moisture sensors and 5 anchors for gas sampling in crop field.

With Lindsey and Bryan

Groundwater sampling for dissolved N2O gas

November 22, 2006

Collected groundwater samples to measure dissolved N2O



With Jessi

Gas sampling and cultivated crop field

November 21, 2006

Collected gas samples all sites but crop field.

Risdal's crop filed was cultivated in the morning.

With Lindsey and Kris

DEA measurement for RWG & RWB soils

November 1, 2006

Conducted DEA (denitrification enzyme activity) measurement experiment (10 Kpa C2H2 and nutrients treatment) with soils from RWG and RWB.


With Leigh Ann and Grant

Gas sampling, collecting litterfall and grass and changing batteries

October 31, 2006

Collected gas samples in all sites except CF.

Collected litterfalls from litterfall collecting basckets in RWB.

Collected grass samples in RWG, RWB, RCG and RCF.

Changed batteries and dessicant bags of a datalogger in RCG.


With Lindsey and Byran

What's eating Dong-Gill? Riparian buffer studies: Intact soil core sampling and C2H2 incubation experiment

What's eating Dong-Gill? Riparian buffer studies: Intact soil core sampling and C2H2 incubation experiment

Intact soil core sampling and C2H2 incubation experiment

October 25-26, 2006

October 25:
1 m depth intact soil cores sampling in RCF and RCG

October 25~26;
C2H2 treatment (no, 10 Pa, 10 K Pa) incubation experiment, Soil moisture, bulk density, inorganic-N exraction and store residual soils in 4oC cooler.

gas sampling time
October 25, 10:00 pm (3hrs later)
October 26, 01:00 am (6hrs later)
October 26, 11:00 am (16hrs later)


With Kris, Jason, Francisco, Mustafa, Phil, Zack, Grant, Paulos, Leigh Ann, Paulos, and Martine.

Fig. 1 1m intact soil core

Fig. 2 Divide 4 pieces (0-15, 15-30, 30-60 and 60-100cm) and sample 8cm soil core in each piece and put the soil cores into Mason jars.

Fig. 3 Analyze nitrate and ammonia using residual soils.

Fig. 4 Incubate soils in 12oC

Fig. 5 Collect gas samples from Mason jars 3, 6 and 16hrs later after starting incubation.