Treesearch

The demand for native plants continues to increase, but published information on how to propagate natives is extremely limited. The Native Plants Journal, a full-color publication produced as a cooperative between the University of Idaho and the USDA Forest Service, provides a forum for sharing practical information about growing and planting native plants.

Soil was collected from used containers before and after they were cleaned at four nurseries that produce longleaf pine seedlings. The nurseries were located in Florida (FL), Georgia (GA), North Carolina (NC), and Mississippi (MS). The GA and MS nurseries used 5% and 10% bleach (sodium hypochlorite), respectively to clean containers, while the NC nursery used chlorine (5 g/L). The FL nursery did not clean their containers. Fusarium spp. were routinely isolated from the residual container soil; no Pythuim spp. or Pyhtophthora spp. were isolated. The most common Fusarium spp. isolated were...

Many countries grow seedlings for reforestation in polybags where root spiraling and root egression can decrease seedling survival and growth following outplanting. The overall objectives of this study were to investigate the effect of chemical root pruning on root spiraling, root egression, and nursery performance of Pinus pseudostrobus, P. montezumae, and P. greggii seedlings and in addition, evaluate the effect of morphological characteristics of those seedlings on survival and field performance after outplanting. This research was carried out in 2 nurseries located at New Mexico State...

Containerized seedlings of Engelmann spruce (Picea engelmannii), sugar pine (Pinus lambertiana), Douglas-fir (Pseudotsuga menziesii), western redcedar (Thuja plicata), and western hemlock (Tsuga heterphylla) transplanted in the early fall and later in the early spring were compared for differences in stem diameter, height, root area, and shoot area. Fall-transplanted P. mensizesii and the Thuja plicata showed an increase in stem diamter of 13% (2.0 mm) and 4% (0.4 mm) respectively. Fall-transplanted seedlings developed larger root systems - Picea engelmannii by 18%, Pinus lambertiana by...

The Towner State Nursery is owned and operated by the North Dakota Forest Service. The nursery is 160 acres in size and is located in north-central North Dakota. The Towner Nursery specializes in the production of conifer seedlings, transplants, and greenhouse-grown container stock for conservation tree plantings. Transplants constitute 80% of the stock produced. The Towner Nursery sells 33 size classes representing 17 tree species. Sales for 1999 totaled 1.4 million trees.

Brazil has established extensive Eucalyptus plantations to support a growing forest products industry. During the past 25 years, the country has been a pioneer in developing clonal propagation systems to regenerate these highly productive plantations. Original clonal selections optimized disease resistance, coppicing ability, and volume growth, while recent priorities have moved to improve volume growth and wood quality. The techniques used for the establishment and management of clone banks has seen fundamental changes during the development of clonal systems. From early clone banks,...

1-page document listing the cover crop and nonproduction ares, fumigation, and production areas of the Louisiana Department of Agriculture and Forestry weed control program.

Use of rooted cuttings for planting of pine trees has become increasingly popular. Vegetative propagation can deliver planting stock of higher genetic quality, increasing productivity and shortening rotations. Clonal forestry can also provide stands of higher uniformity, which can reduce logging and processing cost and yield a much more uniform product. One of the largest disadvantages of rooted cuttings is keeping the cost low compared to bareroot nursery stock. Several large companies in the southeastern United States are in the initial stages of developing operational rooted cutting...

The southern portion of Argentina is called Patagonia, and is located between 37° and 55° south latitude. Across this region, there is a strong topographic and environmental gradient. Precipitation decreases from the western mountains towards the east and temperatures from north to south. These geographic gradients impose different structural patterns of soils and vegetation, as well as different patterns of ecosystem functioning (soil water dynamics, nutrient cycling, net primary production, etc).

Insects, weeds, and diseases are a significant part of the production process that nursery growers must consider in order to effectively grow the desired conifer seedling. For the pests and seedlings, the underlying theme is survival, which encompasses 3 major components: stimulus, recognition, and response (Shigo 1991). Thus, the continuation of any system depends on its ability to recognize a stimulus that, in the case of the seedling, threatens or, in the case of the insect, enhances its survival. Once recognized, there must be the ability to respond rapidly and effectively. The speed...