soil constituents
81Geoarchaeology — is a sub field of archaeology which uses the techniques and subject matter of geology and other earth sciences to examine topics which inform archaeological knowledge and thought.Geoarchaeologists study the natural physical processes that affect… …
82ion-exchange reaction — ▪ chemical reaction Introduction any of a class of chemical reactions between two substances (each consisting of positively and negatively charged species called ions (ion)) that involves an exchange of one or more ionic components.… …
83Xylem — Multiple cross sections of a flowering plant stem showing primary and secondary xylem and phloem[1] Xylem is one of the two types of transport tissue in vascular plants. (Phloem is the other). The word xylem is derived from the Classical Greek… …
84Illuvium — is material displaced across a soil profile, from one layer to another one, by the action of rainwater. The removal of material from a soil layer is called eluviation. The transport of the material may be either mechanical or chemical. The… …
85Evolutionary history of plants — Plants have evolved through increasing levels of complexity, from the earliest algal mats, through bryophytes, lycopods, ferns and gymnosperms to the complex angiosperms of today. While the simple plants continue to thrive, especially in the… …
86microclimate — microclimatic /muy kroh kluy mat ik/, adj. microclimatically, adv. /muy kreuh kluy mit/, n. the climate of a small area, as of confined spaces such as caves or houses (cryptoclimate), of plant communities, wooded areas, etc. (phytoclimate), or of …
87Drosera — Sundew redirects here. For other uses, see Sundew (disambiguation). For other uses, see Drosera (disambiguation). Drosera Drosera tokaiensis …
88Sundew — Taxobox name = Drosera image width = 250px image caption = Drosera tokaiensis regnum = Plantae divisio = Magnoliophyta classis = Magnoliopsida ordo = Caryophyllales familia = Droseraceae genus = Drosera genus authority = L. subdivision ranks =… …
89Salvia miltiorrhiza — Red sage redirects here. Lantana camara (Spanish Flag) is sometimes called this although it is not a sage. Salvia miltiorrhiza Scientific classification Kingdom …
90biology — /buy ol euh jee/, n. 1. the science of life or living matter in all its forms and phenomena, esp. with reference to origin, growth, reproduction, structure, and behavior. 2. the living organisms of a region: the biology of Pennsylvania. 3. the… …
