sábado, 11 de fevereiro de 2012

The Biology of the Soil - Kris Nichols



Kris Nichols has been a Soil Microbiologist with the USDA, Agricutural Research Service (ARS) Northern Great Plains Research Laboratory (NGPRL) in Mandan, ND for over seven years. She was raised on a primarily corn-soybean conventional farm in southwestern Minnesota. Kris received Bachelor of Science degrees in Plant Biology and in Genetics and Cell Biology from the University of Minnesota in 1995, a Masters degree in Enivronmental Microbiology from West Virginia University in 1999, and a Ph.D. in Soil Science from the University of Maryland in 2003. Since 1993, she has studied arbuscular mycorrhizal (AM) fungi – a plant-root symbiont. Her most recent work involves the investigation of glomalin – a substance produced by AM fungi. Glomalin contributes to nutrient cycling by protecting AM hyphae transporting nutrients from the soil to the plant and to soil structure and plant health by helping to form and stabilize soil aggregates. Kris has been examining the impacts of management such as crop rotation, tillage practices, organic production, cover crops, and livestock grazing on soil aggregation, water relationships, and glomalin at NGPRL.