Field Border Plantings 



Vegetation established on the borders of fields to conserve 

 soil and to provide cover and food for wildlife, e.g., a strip 

 of multiflora rose. 



Field Capacity 



The moisture content of a soil, expressed as the per- 

 centage of oven-dry weight (100-110 C.) after the Gravita- 

 tional water has drained away; the field moisture content 

 two or three days after a soaking rain. cf. Capillary water, 

 Water-holding capacity. 



Field Crops 



Crops such as grain, hay, root, and fiber in contrast to 

 vegetable (truck) and fruit crops. 



Field Layer 



The stratum of vegetation formed by grasses, forbs, and 

 dwarf shrubs. 



Field Strip Cropping 



The kind of Strip cropping in which crops are grown 

 in parallel strips across a slope but which do not follow 

 contour lines, and strips of grass or other close-growing plants 

 are grown alternately with the strips of cultivated crops. 



Field Test 



An experiment conducted under ordinary field condi- 

 tions, usually less subject to control than a precise experi- 

 ment. 



Filament 



The stalk of an Anther or of a down-feather. 



Filter Bridge 



A land connection, temporary in duration and restricted 

 in extent, limiting the kinds of organisms which can migrate 

 over it, e.g., the Bering Strait in the Pleistocene, cf . Corridor, 

 Sweepstakes bridge. 



