35,099 research outputs found

    Virus diseases of trees and shrubs

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    Occurrence and management of oak in southern Swedish forests

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    This article describes the current proportions of forest types with oak (Quercus robur and Q. petraea) in southern Sweden, provides an overview of oak distribution over time and reviews literature about oak regeneration relevant for the region. Further we discuss silvicultural possibilities to maintain and promote oak in Scandinavia. In Götaland pure oak forest covers 1% of the forest area and mixed forest types with > 10% oak proportion cover approximately 10% of the area. Common types of mixture are spruce-oak and pine-oak forest. Both mixtures are frequent in mature forest, especially pine-oak. Additionally, about one third of spruce-oak mixtures can be found in medium-aged forest. Intensive management would be necessary to promote single oak trees in old pine stands or spruce plantations, but the proportion of oak in coniferous forest provides some potential to maintain additional oak trees. The distribution of acorns by Jays, enhanced measures against browsing, and the release of single oak trees from competing tree species could help to maintain more oak trees for nature conservation. However, regarding management of oak for timber production, conventional methods are recommended. Planting after clear cutting of coniferous forest, or short shelter periods after mast years in oak stands, are established methods to regenerate pure oak stands. Another possibility to develop mature oak forest are mixed oak-spruce plantations, as traditionally practised in a small region in southern Sweden. The different approaches of oak management in Sweden were presented in April 2012 on the annual meeting of the section silviculture of DVFFA (German Union of Forest Research Organizations) in Wermsdorf near Leipzig to give an overview and access to recent forest research in Sweden

    Stewardship Plan for the 5 Corners Reserve, Lee, NH

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    The 20.7–acre Lee Five Corners Reserve (Reserve) is located north of Route 4 and west of Snell Road in the northern “Five Corners” region of Lee, New Hampshire. The property is accessed at the end of Old Concord Turnpike, which leads northwest from Snell Road near the intersection of Route 155 (Map 1). The gravel access road continues through the Five Corners Reserve and onto a Town of Durham parcel that houses a public drinking water well. An iron gate that blocks public access to the Durham well site is located on the Five Corners Reserve. A small parking area is located along the east side of the access road, just before the gate

    Stewardship Plan for Garrity Reserve, Lee, NH

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    The 16.02-acre Garrity Reserve lies on the west side of Garrity Road in the northeast region of the Town of Lee, New Hampshire (Map 1). The Garrity Reserve is identified on the Lee Tax Map as Map 9 Lots 3- 0 and 3-1 (Appendix A). The parcel has just over 790-feet of frontage on Garrity Road. There is no parking on the property; visitors park on the opposite side of Garrity Road, alongside the Gluke cemetery. The property is bordered by a residential subdivision to the west and rural residences to the north and south. A large portion of the property was a former sand and gravel pit operated by the Town of Durham. The two entrances to the pit are gated and the “roads” into the pit are overgrown. The remaining land is upland white pine forest. A few pockets of wetland are found at the bottom of the pit, resulting from the excavation. Early successional species including gray birch and aspen, along with white pine and pitch pine are growing in the previously excavated area. Invasive species, including multiflora rose and Japanese knotweed, heavily infest the northern entrance road and the north slope of the pit. Piles of asphalt and a large boulder pile remain. A portion of the northern slope of the pit is laden with debris, similar to an old farm dump. The steeper areas of the un-reclaimed pit are exposed sandy slopes

    East Kingston Buffer Outreach, CTAP Program

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    Rockingham Planning Commission worked with the East Kingston Conservation Commission to identify buffer areas on the Pheasant Run conservation property, install buffer boundary markers and interpretive signage for entrances, buffers and wetlands on the Pheasant Run conservation property, develop and distribute brochures about the Pheasant Run conservation property, develop an outreach program about buffers at the East Kingston library, and develop a newspaper about protecting wetlands and water resources, including water quality protection measures, buffer planting and maintenance, functions and values of buffers, and wildlife and aquatic habitat

    Livestock feed resources in West African Sahel: A review

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