- 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 ...
The minimum mass water content at which a small sample of soil will barely flow under a standard treatment.
Industry:Earth science
The replacement of one atom by another of similar size in a crystal structure without disrupting or seriously changing the structure. When a substituting cation is of a smaller valence than the cation it is replacing, there is a net negative charge on the structure.
Industry:Earth science
The process whereby primary soil particles (sand, silt, clay) are bound together, usually by natural forces and substances derived from root exudates and microbial activity.
Industry:Earth science
The state in which the variable (head, concentration, energy) changes with time.
Industry:Earth science
The ability of plants to resist the adverse, nonspecific effects of excessive soluble salts in the rooting medium.
Industry:Earth science
Suspension in water of particles so finely divided that they will not settle under the action of gravity, but will diffuse, even in quiet water, under the random impulses of Brownian motion. Particle sizes range from about 1 mm to about 1nm; however, there is no sharp differentiation by size between coarse ("true") suspension and colloidal suspension or between colloidal suspension and solution.
Industry:Earth science
Weakly cemented to indurated soil nodules cemented with SiO2. Durinodes break down in concentrated KOH after treatment with HCl to remove carbonates, but do not break down on treatment with concentrated HCl alone.
Industry:Earth science
The amount of water released between in situ field capacity and the permanent wilting point (usually estimated by water content at soil matric potential of -1. 5 MPa). It is not the portion of water that can be absorbed by plant roots, which is plant specific.
Industry:Earth science
The aluminum and hydrogen that can be replaced from an acid soil by an unbuffered salt solution such as KCl or NaCl.
Industry:Earth science
