- 行业: Earth science
- Number of terms: 26251
- Number of blossaries: 0
- Company Profile:
An international scientific society that fosters the transfer of knowledge and practices to sustain global soils. Based in Madison, WI, and founded in 1936, SSSA is the professional home for 6,000+ members dedicated to advancing the field of soil science. It provides information about soils in ...
A dark colored, ferromagnesium mineral representative of the pyroxene group.
Industry:Earth science
A large mass of snow, ice, soil, or rock, or mixtures of these materials, falling, sliding, or flowing very rapidly under the force of gravity. Velocities may sometimes exceed 500 km/hr.
Industry:Earth science
A soil layer with physical characteristics that limit root penetration and restrict water movement.
Industry:Earth science
(i) Genetic - A natural subsurface soil layer with low or very low hydraulic conductivity and differing in certain physical and chemical properties from the soil immediately above or below the pan. (ii) Pressure or Induced - A subsurface horizon or soil layer having a higher bulk density and a lower total porosity than the soil directly above or below it, as a result of pressure that has been applied by normal tillage operations or by other artificial means. Frequently referred to as plowpan, plowsole, or traffic pan.
Industry:Earth science
(i) Feeding by one organism on the cells of a second organism, which is usually larger than the first. The parasite is, to some extent, dependent on the host at whose expense it is maintained. (ii) An association whereby one organism (parasite) lives in or on another organism (host) and benefits at the expense of the host.
Industry:Earth science
A physical, meteorological, geological, or chemical aspect of the environment.
Industry:Earth science
A device for measuring the soil-water matric potential in situ; a porous, permeable ceramic cup connected through a water-filled tube to a manometer, vacuum gauge, pressure transducer, or other pressure measuring device.
Industry:Earth science
Grande quantidade de neve, gelo, solo ou rocha, ou misturas destes materiais, em queda, deslizamento ou que flui muito rapidamente sob a força da gravidade. As velocidades podem, por vezes exceder os 500 km / hr.
Industry:Earth science
A soil moisture regime that has no water available for plants for more than half the cumulative time that the soil temperature at 50 cm below the surface is >5°C, and has no period as long as 90 consecutive days when there is water for plants while the soil temperature at 50 cm is continuously >8°C.
Industry:Earth science
A dioctahedral smectite containing ferric iron with the majority of the charge originating in the tetrahedral layers.
Industry:Earth science
