Edaphic Factors. Ecological influences characteristic of the soil, brought about by its physical and chemical characteristics.
Edaphology. ( Ped.). The scientific study of the relationships between soils and living things, including man's use of the land. ( SSSA).
Eluviation. ( Ped.). Removal of soil material from the upper to the lower horizon in solution or in colloidal suspension . ( SSSA).
Enclave. A patch of territory completely surrounded by a larger area from which it differs in some essential respect, e.g., an area within but not forming part of a forest reserve; a specific consociation within can association. ( BCFT).
Endemic. (a) ( Genl.). Confined in its indigenous occurrence to a particular region. (b) ( Entom). The normal population level of a potentially destructive species. Cf. Epidemic. ( BCFT).
Erosion. The removal of soil and rock material by water, wind and gravity; generally refers to accelerated erosion.
Erosion, Accelerated. Abnormally rapid erosion in an environment disturbed by animal life, chiefly man, and due primarily to such disturbance. ( BCFT.).
Erosion, Normal. The removal of soil and rock material by water, wind and gravity, in a manner and at a rate characteristic of the land surface in its natural environment; sometimes referred to as geological erosion. ( BCFTmodif.).
Erosion, Pavement. A layer of more resistant material left exposed by the erosion of soil overlying it. ( BCFT).
Error, Experimental ( Stat.). The variations between plots or other experimental units, due to causes other than the treatments that have been applied . May refer to a variance of a staandard error. Does not imply a mistarke, but limitations a of material and method. ( BCFT).
Error, Standard ( S.E.) ( Stat.). A measure of the exent to which repeated determinations of a quantity of a sample mean or of a comparison between the means, would vary among themselves. The standard error can be obtained by dividing the standard deviation by the square root of the number of observations. ( BCFT).
Escape. A plant originally cultivated, now found wild. ( BCFT).
Establishment. Development of a new, crop, naturally or assisted, to a stage where the young Regeneration, natural or artificial, is considered safe from normal adverse influences such as frost, drought or weeds, and no longer needs special protection or tending operations other that cleaning, thinning and pruning. ( BCFT),
Even-Aged. Applied to a stand consisting of trees of approximately the same age. Differences upto 25% of the rotation age may be allowed in cases where a stand is not harvested for 100 or more years. Anton. Uneven-aged.