This project is an affiliate site in the North American long term soil productivity (LTSP) network located on Green Diamond Resources property near Matlock, WA in Mason Co., Washington. The site was harvested in early 2003 and then replanted with Douglas-fir seedling in early 2004. The study is a randomized complete block design with 4 replications each of non-harvested forest and four harvested treatments in 0.3 ha plots. The study focuses on two harvesting intensities (bole only or simulated whole-tree harvest) with or without suppression of competing vegetation with herbicides. Negative tension tube lysimeters are installed as pairs to depths of 20 and 100 cm at each plot and samples are collected monthly and analyzed for total dissolved N (ammonium, nitrate and organic N) and organic C. Potential evapotranspiration (Thornwaite method) is subtracted from on-site precipitation to determine net soil water flux. The soil is a coarse, glacial outwash bordering between an entisol and inceptisol. The objective of the study is to determine whether harvesting intensity and vegetation control affect soil carbon and nitrogen flux.