Class IV are well suited to one or more of the special crops, such as 

 fruits and ornamental trees and shrubs, but this suitability itself is 

 not sufficient to place a soil in Class IVo 



In subhumid and semiarid regions soils in Class IV may produce good yields 

 of adapted cultivated crops during years of above average rainfall; low 

 yields during years of average rainfall| and failures during years of be- 

 low average rainfall. During the low rainfall years the land must be pro- 

 tected even though there can be little or no expectancy of a marketable 

 crop. Special treatments and practices to prevent soil blowing, conserve 

 moisture, and maintain soil productivity are required. Sometimes crops 

 must be planted or emergency tillage used for the primary purpose of main- 

 taining the soil during years of low rainfall. These treatments must be 

 applied more frequently or more intensively than on soils in Class III. 



Land limited in use — generally not suited for cultivation 



Class V . — Soils in Class V have little or no erosion hazard but have other 

 limitations that are impractical to remove that limit their use largely to 

 pasture, range, woodland, or wildlife food and cover. 



Soils in this class have limitations that restrict the kind of plants that 

 can be grown and that prevent normal tillage of cultivated crops. They are 

 nearly level but some are wet, are frequently overflowed by streams, are 

 stony, have climatic limitations, or have some combination of these limi- 

 tations. Examples of Class V are (1) soils of the bottom lands subject to 

 frequent overflow that prevents the normal production of cultivated crops, 

 (2) nearly level soils with a growing season that prevents the normal pro- 

 duction of cultivated crops, (3) level or nearly level stony or rocky 

 soils, and (4) ponded areas where drainage for cultivated crops is not 

 feasible but where soils are suitable for grasses or trees. Because of 

 these limitations, cultivation of the common crops is not feasible but 

 pastures can be improved and benefits from proper management can be ex- 

 pected. 



Class VI . — Soils in Class' VI have severe limitations that make them gener- 

 ally unsuited for cultivation and limit their use largely to pasture or 

 range, woodland, or wildlife food and cover. 



Physical conditions of soils placed in Class VI are such that it is prac- 

 tical to apply range or pasture improvements, if needed, such as seeding, 

 liming, fertilizing, ard water control with contour furrows, drainage, 

 ditches, diversions, or water spreaders. Soils in Class VI have continu- 

 ing limitations that cannot be corrected, such as (1) steep slope, (2) 

 severe erosion hazard, (3) effects of past erosion, (4-) stoniness, (5) 

 shallow rooting zone, (6) excessive wetness or overflow, (7) low-moisture 

 capacity, (8) salinity or alkalinity, or (9) severe climate. Due to one 

 or more of these limitations these soils are not generally suited for 

 cultivated crops. But they may be used for pasture, range, woodland, or 

 wildlife cover or some combination of these. 



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