Gas sampling

June 30, 2006

Collected gas samples in all sites.



With Nathan, Coral and Ozden

Fig. 1 Gas sampling in JWB

Fig. 2 JWG site

Fig. 3 Gas sampling in LWB.

Fig. 4 LWG site

Fig. 5 RCF site

Fig. 6 Gas collecting in RCF

N mineralization experiment

July 27, 2006

Collected the buried bags which was installed April, 2006 in RWG, RWB and RCG and took out the soil from the bags.

Placed subsoil of the soil into bottles containing 100 ml 2M KCl and some subsoil transported to the lab and determined soil moisture.

Sampled 3 of 10cm intact soil cores in gas chambers of each site and placed it into poly-bags and buried again. Placed the subsoil into bottles containing 100ml 2M KCl and some subsoil transported to the lab to determine soil moisture.

Shanked the bottles about 1hr and allowed it to settle about 1hr and filterate the solution.

The solution was freezed and storaging in the freezer.

With Coral

Gas sampling

June 23, 2006

Collected gas samples in all sites.

A soil moisture sensor was broken in LWB site, so there is only one site (LWG) soil moisture data.


By Zack, Coral, Odzon, and Grant

C2H2 treatment previous experiment

June 22-23, 2006


Produced pure C2H2 gas from reaction of CaC2 and water.

Treated C2H2 10 K Pa to intact soil cores.

Sampled gas 3hr, 6hr, 12, 18hr and 24hr later after C2H2 treatment.



With Tom, Leigh Ann, and Nathan

Fig. 1 Materials for C2H2 gas producing- CaC2, 3 jars, 2 tubes, 1 gas bag and a syringe.

Fig. 2 Inserted C2H2 gas inside Mason jars containing intact soil cores (L=8cm, D=2cm).

Fig. 3 6 intact soil cores (0-10cm n=3, 90-100 cm n=3) treated C2H2 (10 K Pa) are incubated in room temperature (22oC).

Intact soil core sampling

June 21, 2006

Sampled intact soil cores (1 m depth, n=3) using a jack hammer and a jack in the first gas sampling point of John Risdal farm site.

Moved to lab and top 0-10cm and bottom 90-100 cm soils were seperated.

Put the seperated soil into Mason jars and storaged in the lab cooler.


With Leigh Ann, Zack, Grant and Coral

Ground water sampling

June 20, 2006

Collected groundwater for nitrate and dissolved nitrous oxide and measured pH of groundwater in site.

With Jessi and Paul

Gas sampling

June 15, 2006

We (Grant and Coral) collected gas samples in all sites.

Fig. 1 Ron Risdal North site (a crop field, a warm season grass filter and a woody buffer).

Fig. 2 Woody buffer in Ron Risdal North site.

How to measure the headspace of a bottle containning soil core?

June 13, 2006

Conduct pressure transducer test to know headspace volume using tubes (known volume) and made several equations to estimate headspace of bottles containning soil core.

Fig. 1 Tubes (known volume) and pressure transducers for the experiment to make equation - relation between haedspace and pressure change after adding air.

Gas sampling

June 8, 2006

Collected gas samples in all sites.


With Grant and Coral

Fig. 1 Warm season grass filter in Lonnie Strum farm site.

Fig. 2 Woody buffer in Lonnie Strum farm site.

Gas sampling

June 1, 2006

Collected gas samples in all sites.

With Jess, Coral and Nathan

Fig.1 Nathan in a crop field, trees in riparian area and cloudy sky.

Fig.2 Nathan is collecting gas sample in the crop field of Ron Risdal farm site.

Fig. 3 A warm season grass filter in John Risdal farm site.

Fig. 4 A woody buffer in John Risdal farm site.

Fig. 5 A woody buffer in Ron Risdal site.

Fig.6 A warm season grass filter in Ron Risdal farm site.

Fig. 7 A cool season grass filter in Ron Risdal site.

Fig. 8 Coral and Jess are collecting gas sample in the cool season grass filter in Ron Risdal site.