Based on a methodology developed in a previous study that estimated wood supply on four National Forests in northern Arizona [33], we subtracted from the total area of ponderosa pine in the watersheds — 0.68 million ha (1.68 million acres)-- those areas that are typically excluded from mechanical thinning projects due to steepness, restrictions in land management, previous treatments, or considerations of soil, habitat, or wildlife conditions (Table 1). (journals.plos.org)
Openings in ponderosa pine forests created by wildfire have persisted for more than a century on harsh, south - facing slopes in Colorado, the researchers noted in their report. (sciencedaily.com)
Mechanical thinning of ponderosa pine forests in the first analysis area of the 4FRI project — 6,190 ha / year for ten years totaling 61,900 ha (15,300 ac / year; 153,000 acres total)-- increased mean annual runoff from 3.13 million m3 (2,540 acre - feet) in a simulated drought to 7.27 million m3 (5,890 acre - feet) in a pluvial. (journals.plos.org)