This letter is a reference for Dariya Ordanovich's application from her research internship supervisor Daniel Fischer. The internship lasted from July 1st to August 26th 2011. During her internship, Dariya assisted with research on carbon sequestration in soil amended with biochar and compost, performing lab analyses and field work. She proved herself to be a very interested and responsible learner, making great contributions. Daniel Fischer recommends Dariya for the position she is applying to.