The following additional subdivisions were mades dry cropland, irrigated 

 cropland, tame pasture, range, irrigated native grassland, and grazed wood- 

 land. These subdivisions were additions to, rather than substitutions for, 

 the four main land use groups. 



The following definitions of land use were used in making the Inventory: 



Cropland — Land currently tilled including cropland harvested, crop fail- 

 ure, summer fallow, idle cropland, cropland in cover crops or soil-improve- 

 ment crops not harvested or pastured, rotation pasture, and cropland being 

 prepared for crops or newly seeded crops. Cropland also includes land in 

 vegetables and fruits, including those grown on farms for home use. All 

 tame hay was included as cropland. Meadowland was considered as cropland 

 when (1) it had soil and water conditions capable of producing a hay crop 

 in normal years, (2) was used primarily for the production of hay which is 

 harvested nearly every year, and (3) was locally considered as cropland 

 rather than as pasture or range. 



Non-irrigated cropland — Land to which no supplemental water is applied 



artificially. 



Irrigated cropland ~ Land to which water is usually applied by artificial 

 means. The 1958 acreage includes only land which was considered as irri- 

 gated cropland in 1957. 



Permanent grassland — All land in grass for five years or longer. 



Pasture ™ Land in tame grass or other long-term forage that is used pri- 

 marily for grazing. Does not include pasture in crop rotation. 



Range — Natural grazing land. Forage produced primarily by native grass, 

 forb, legume and browse species. May contain scattered trees with less 

 than 10 percent canopy, but the natural vegetation is such as to identify 

 its use primarily as permanent grazing land. 



Irrigated native grassland — Natural meadows, lowlands and benchlands 

 irrigated to increase production when water is available. Forage may be 

 cut for hay, as in the Big Hole area in Beaverhead County, or harvested 

 by grazing. Forage produced consists primarily of native species. 



Forest and woodland — (a) Lands which are at least 10 percent stocked"""^ 1 

 by forest trees of any size and capable of producing timber or other for- / 

 est products, or capable of exerting an influence on the water regimej / 

 (b) lands from which the trees described in (a) have been removed to less I 

 than 10 percent stocking and which have not been developed for other use; / 

 and (c) afforested (planted) areas. i 



Grazed woodland — This is land which meets the definition of wood- ' 

 land (10 percent or more stocked or cut-over woodland) but which is 

 grazed. Problems are determined in relation to management and im- 

 provement of the forage resource, in addition to those associated 

 with woodland management. 



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