Treesearch

Native wildflower seed is needed to restore rangelands of the Intermountain West. Commercial seed production is necessary to provide the quantity of seed needed for restoration efforts. A major limitation to economically viable commercial production of native wildflower (forb) seed is stable and consistent seed productivity over years. Variations in spring rainfall and soil moisture result in highly unpredictable water stress at flowering, seed set, and seed development, which for other seed crops is known to compromise seed yield and quality.

Native forb seed is needed to restore rangelands of the Intermountain West. Commercial seed production is necessary to provide the quantity of seed needed for restoration efforts. A major limitation to economically viable commercial production of native forb seed is weed competition. Weeds are adapted to growing in disturbed soil, and native forbs are not competitive with these weeds. There is a considerable body of knowledge about the relative efficacy of different herbicides to control target weeds, but few trials have tested the tolerance of native forbs to commercial herbicides. The...

Effective control methods need to be developed to reduce crested wheatgrass (Agropyron cristatum [L.] Gaertner) monocultures and promote the establishment of native species. This research was designed to determine effective ways to reduce crested wheatgrass and establish native species while minimizing weed invasion. We mechanically (single- or double-pass disking) and chemically (formula available in PDF) treated two crested wheatgrass sites in northern Utah followed by seeding native species in 2005 and 2006. The study was conducted at each site as a randomized block split plot design...

Spotted knapweed (Centaurea stoebe ssp. micranthos) is one of the most troublesome rangeland weeds in western North America. As part of a larger investigation evaluating the use of targeted sheep grazing to control spotted knapweed, we examined sheep preference and forage quality of dried spotted knapweed in different phenological stages. We collected spotted knapweed for preference evaluation trials from a sagebrush steppe community near Dubois, Idaho throughout the 1999 growing season and analyzed the plants for nutritional quality. Preference for spotted knapweed was evaluated in a...

The objective of the study was to determine the effects of season and intensity of clipping using simulated browsing on suckers' (Populus tremulaides Michx.) basal area growth on Cedar Mountain, Southern Utah, Western United States of America. Three randomly selected stands measuring 70 m x 70 m were clear-felled in mid-July, 2005, and fenced. Simulated browsing treatments of 0%, 20%, 40%, and 60% removal of current year's growth on aspen suckers were randomly applied in early, mid-, and late summers of 2006 and 2007 on permanently demarcated quadrats. Sucker basal area was monitored by...

The answer to the title question should be "yes"! Currently, there is a lot of chatter about sustainable forestry and alternative fuels, including conversion of wood to bioenergy. At first glance it may seem like there is a conflict - how can removal of woody biomass be sustainable? Whether you are a small woodlot owner doing sustainable harvesting, looking for rotational forest products, chasing bioenergy products, or looking to use forest "waste" left from thinning or harvesting, one question I am repeatedly asked is: "How much woody material should I leave on my forest site?"

This synthesis of post-fire treatment effectiveness reviews the past decade of research, monitoring, and product development related to post-fire hillslope emergency stabilization treatments, including erosion barriers, mulching, chemical soil treatments, and combinations of these treatments. In the past ten years, erosion barrier treatments (contour-felled logs and straw wattles) have declined in use and are now rarely applied as a post-fire hillslope treatment. In contrast, dry mulch treatments (agricultural straw, wood strands, wood shreds, etc.) have quickly gained acceptance as...

Montreal Process Criteria and Indicators (MPCI) were established to monitor forest conditions and trends to promote sustainable forest management. The Soil Indicator of forest health was developed and implemented within the USFS Forest Inventory and Analysis (FIA) program to assess condition and trends in forest soil quality in U.S. forests regardless of ownership. The Soil Indicator differs from intensive site monitoring programs in that it is a nationally applied, landscape-scale, grid-based design across all ecoregions,forest types, and land ownership categories. To date, the Soil...

Development of the best sampling design to answer a research question should be an interactive venture between the land manager or researcher and statisticians, and is the result of answering various questions. A series of questions that can be asked to guide the researcher in making decisions that will arrive at an effective sampling plan are described, and a case study is used to explain how the sampling effort was designed for the Forest Soil Monitoring Protocol.

Forest managers and resource scientists and specialists are engaged in a partnership to sustain the natural resource value of our national forests. Managers are faced with deciding which activities provide the best resource benefits with the least resource damage. Many, but not all, aspects of the decision process must be based on the science supporting our current understanding of natural resources. Scientists are charged with continuing to build these understandings and interpreting their effects in an applications setting. The roles of land managers, subject matter experts (field soil...