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bud
bud in lower plants and animals, a protuberance from which a new organism or limb develops; in seed plants, a miniaturized twig bearing compressed rudimentary lateral stems (branches), leaves, or flowers, or all three, and protected in cold climates by overlapping bud scales. In warm climates buds ...
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zone
zone [Gr.,=girdle], in geography, area with a certain physical and/or cultural unity that distinguishes it from other areas. The division of the earth into five climatic zones probably originated (5th cent. BC) with Parmenides, who recognized a torrid zone (see tropics ) and north and south temper...
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climate
climate average condition of the atmosphere near the earth's surface over a long period of time, taking into account temperature, precipitation (see rain ), humidity , wind , barometric pressure, and other phenomena.
Primary Influence on Climate
The major influence governing the climat...
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varve
varve in geology, pair of thin sedimentary layers formed annually by seasonal climatic changes. Usually found in glacial lake deposits, varves consist of a coarse-grained, light-colored summer deposit and a finer-grained, dark-colored winter deposit formed when fine sediment settles out from the wa...
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craquelure
craquelure , hairline surface cracking of paintings into characteristic patterns determined by age, climatic conditions, and the materials used in the work. Cracking was so common in works by 18th-century English painters that it became known as craquelure anglaise. Forgers and restorers often imi...
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Integrated Pest Management
Integrated Pest Management (IPM), planned program that coordinates economically and environmentally acceptable methods of pest control with the judicious and minimal use of toxic pesticides. IPM programs are based on a careful assessment of local conditions, including such factors as climate, crop ...
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cline
cline in biology, any gradual change in a particular characteristic of a population of organisms from one end of the geographical range of the population to the other. Gradients of characteristics usually accompany, and are responses to, environmental gradients; for example, a mountain range featur...
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growing season
growing season period during which plant growth takes place. In temperate climates the growing season is limited by seasonal changes in temperature and is defined as the period between the last killing frost of spring and the first killing frost of autumn, at which time annual plants die and bienni...
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annual rings
annual rings the growth layers of wood that are produced each year in the stems and roots of trees and shrubs. In climates with well-marked alternations of seasons (either cold and warm or wet and dry), the wood cells produced when water is easily available and growth is rapid (generally correspo...
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tropics
tropics also called tropical zone or torrid zone, all the land and water of the earth situated between the Tropic of Cancer at lat. 23 1/2 °N and the Tropic of Capricorn at lat. 23 1/2 °S. Every point within the tropics receives the perpendicular rays of the sun at noon on at least ...
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