frost cracks

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• frost rib — noun or frost ridge : a ridge on a tree trunk caused by the healing and recurrence of frost cracks …   Useful english dictionary

• Frost — is the solid deposition of water vapor from saturated air. It is formed when solid surfaces are cooled to below the dew point of the adjacent air. [cite web |url=http://www.weatherquestions.com/What causes frost.htm |title=What causes frost?… …   Wikipedia

• Frost flower — Frost flowers is the name commonly given to a condition in which thin layers of ice are extruded from long stemmed plants in autumn or early winter. The thin layers of ice are often formed into exquisite patterns that curl into petals that… …   Wikipedia

• Frost heaving — (or frost heave) occurs when soil expands and contracts due to freezing and thawing. This process can damage plant roots through breaking or desiccation, cause cracks in pavement, and damage the foundations of buildings, even below the frost line …   Wikipedia

• frost shattering —    The mechanical disintegration, splitting, or breakup of a rock or soil caused by the pressure exerted by freezing water in cracks or pores, or along bedding planes. Sometimes referred to as congelifraction.    GG …   Glossary of landform and geologic terms

• plant disease — ▪ plant pathology Introduction       an impairment of the normal state of a plant that interrupts or modifies its vital functions.       All species of plants, wild and cultivated alike, are subject to disease. Although each species is… …   Universalium

• Sun scald (flora) — un scaldCauses:Sun scald is the freezing of bark following the high temperatures in the winter season. The reason the sun can cause so much damage to trees is because of dormancy. When a tree is dormant in the winter it can be reactivated by warm …   Wikipedia

• wood — wood1 woodless, adj. /wood/, n. 1. the hard, fibrous substance composing most of the stem and branches of a tree or shrub, and lying beneath the bark; the xylem. 2. the trunks or main stems of trees as suitable for architectural and other… …   Universalium

• Wood — /wood/, n. 1. Grant, 1892 1942, U.S. painter. 2. Leonard, 1860 1927, U.S. military doctor and political administrator. * * * I Hard, fibrous material formed by the accumulation of secondary xylem produced by the vascular cambium. It is the… …   Universalium

• polar ecosystem — Introduction       complex of living organisms in polar regions such as polar barrens and tundra.  Polar barrens and tundra are found at high latitudes on land surfaces not covered by perpetual ice and snow. These areas lying beyond the tree line …   Universalium

• Serpent Mound — This article is about the site in the USA. For the one in the UK, see Skelmorlie. Serpent Mound U.S. National Register of Historic Places …   Wikipedia