Furnace vs. ceramics
So I was working with our carbon/nitrogen analyzer a few months back, and it had a pretty bad air leak. I opened up the combustion chamber and found that the intense heat of the furnace had cracked the ceramic combustion tube. For future reference 1300 degrees C is pretty dang hot. The new combustion tube seems to be ok so far, but it looks like even the slightest defect can really kill these tubes.
Soil Sampling in Upstate NY Winter
I went sampling this past weekend, because I realized that if I wanted any soils for winter greenhouse experiments I needed them soon. Any later and the ground would be completely frozen solid. As it was, I feel like a real hardcore soil scientist because it was about 28 degrees with gusty winds when I sampled. Luckily the thin layer of snow and corn stover kept the soils from being totally frozen. See below for pictures of the sites near Penn Yan, NY and my collection of 90 plus gallons of soil.
Halo/thermophiles in Yellowstone
I went to a wedding recently in Bozeman, MT and had a chance to make a quick stop at Yellowstone National park. It’s famous for microbes adapted to extremely hot and salty conditions (and I guess some sort of geysers too).
Below you can see a few of the wonderful habitats. The heat is pretty evident from the steam–it results from being on the edge of a giant supervolcano after all. The greenish tinge is microbes in action, and the smell of sulfate reducing archaea was pretty strong too.
Soil Incubators
One of my current projects involves incubating agricultural soils with different management histories to test how management and timing substrate addition affects soil respiration, nitrogen mineralization, and microbial community structure.
The soil is sitting in a modified vacuum filter unit with a 0.2 micron filter. Sitting on a teflon plug in the middle of the soil is an alkaline carbon dioxide trap (the little flask). When we seal the chamber we can measure total respiration, and when we open it and run water through the soil into the collection vessel in the bottom we can analyze the amount of nitrogen mineralized.
Welcome
Hello, I am a postdoctoral associate in the Horticulture department at Cornell University. My research focuses on the interaction of soil microbes and agricultural management practices, and how they affect soil productive and function. I will be adding more to this site later, but for the time being you can refer to my graduate school webpage.